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Research Article
Next step in Monacha cantiana (Montagu, 1803) phylogeography: northern French and Dutch populations (Eupulmonata, Stylommatophora, Hygromiidae)
expand article infoJoanna R. Pieńkowska, Giuseppe Manganelli§|, Małgorzata Proćków, Debora Barbato§|, Katarzyna Sosnowska, Folco Giusti§, Andrzej Lesicki
‡ Adam Mickiewicz University in Poznań, Poznań, Poland
§ Università di Siena, Siena, Italy
| NBFC (National Biodiversity Future Center), Palermo, Italy
¶ University of Wrocław, Wrocław, Poland
Open Access

Abstract

Features of shell and genitalia as well as nucleotide sequences of selected mitochondrial and nuclear genes of specimens of Monacha cantiana from ten northern French and two Dutch populations were compared with the same features of British and Italian populations. They were found to be very similar to populations previously identified as belonging to the CAN-1 lineage of M. cantiana. This confirms previous suggestions that M. cantiana was introduced to western Europe (England, France and the Netherlands) in historical times.

Key words

16SrDNA, COI, genitalia, H3, ITS2, mitochondrial and nuclear genes, nucleotide sequences, population distribution, shell

Introduction

Monacha Fitzinger, 1833 is a species-rich genus including numerous nominal species diversified mainly in the Anatolian and European parts of Turkey, in the southern parts of the Balkans and in Italy (Hausdorf 2000a, 2000b; Welter-Schultes 2012; Neiber and Hausdorf 2017). Only two species, Monacha cantiana (Montagu, 1803) and M. cartusiana (Müller, 1774), used to be reported from Western Europe. Two more were introduced not long ago, namely M. ocellata (Roth, 1839) and M. samsunensis (Pfeiffer, 1868), the latter until recently reported as M. atacis Gittenberger & de Winter, 1985 (Welter-Schultes 2012; Anderson et al. 2018; Pieńkowska et al. 2018a, 2022).

Monacha cantiana, commonly known as the Kentish snail, was described by Montagu (1803: 422) from Kent in Britain “where it is found chiefly upon the chalky soil”. Type material consists of three syntypes, which were probably collected around Sandwich in Kent (51°16'26.46"N, 1°20'14.74"E) by William Boys, and are kept with the Montagu Collection in the Royal Albert Memorial Museum & Art Gallery, Exeter (Oliver et al. 2017). Montagu later added several localities in other counties of southern Britain to the original description (Montagu 1808: 145, pl. 23, fig. 1).

Figure 1. 

Map of localities of the populations of Monacha cantiana analysed. See Table 1 for details of populations 1–26, Brulé and Bichain (2019) for populations 27 and 28, and Pieńkowska et al. (2019a) for populations 29–32.

It has been suggested that this species was introduced to the British Isles in historical times (Kerney 1970, 1999; Evans 1972). Our previous research on several M. cantiana populations, using an integrative approach combining analysis of the shell structure and genital anatomy with that of nucleotide sequences of mitochondrial and nuclear gene fragments, revealed six lineages, namely CAN-1, CAN-2, CAN-3, CAN-4, CAN-5 and CAN-6 (Pieńkowska et al. 2018b, 2019a). CAN-1 (representing true M. cantiana) was found to occur in the Latium region of Italy and in Spain and Britain (Pieńkowska et al. 2018b; Čejka et al. 2020), in line with the suggestion that this lineage probably spread with the Roman conquests (Pieńkowska et al. 2018b). Populations of CAN-2 were found in regions of Italy (Emilia Romagna) north of Latium (Pieńkowska et al. 2018b) and somewhat surprisingly in Slovakia (Bratislava) (Čejka et al. 2022), while those of CAN-3 were reportedly widespread even further north in Italy (Friuli-Venezia Giulia) as far as Vienna in Austria (Pieńkowska et al. 2018b, 2019b) and Bratislava in Slovakia (Čejka et al. 2022). The lineage CAN-4, corresponding to Monacha cemenelea (Risso, 1826), was found in south-eastern France (Pieńkowska et al. 2018b; Čejka et al. 2020). CAN-5 and CAN-6 are reported from the Apuan Alps and represent one or two different species, the naming of which requires further studies on topotypical material (Pieńkowska et al. 2019a).

Monacha cantiana has been reported from France (Kerney et al. 1983; Falkner et al. 2002; Cucherat 2005; Lecaplain 2007; Gargominy et al. 2011; Welter-Schultes 2012; Bichain et al. 2019; Brulé and Bichain 2019; INPN 2019). Brulé and Bichain (2019) carefully analysed shell and genitalia features of M. cantiana specimens collected at two sites in north-eastern France near the towns of Cutry and Longwy. However since the CAN-1, CAN-2, CAN-3, and CAN-4 lineages of M. cantiana do not differ in shell or genital features, the phylogenetic relationships of populations from north-eastern France had to be clarified by genetic analysis. Although M. cantiana is known to occur in the Netherlands (Kerney et al. 1983; Gittenberger et al. 1984; Welter-Schultes 2012), it has never been confirmed genetically.

The aim of the present research was: 1) to study morphological (shell and genitalia) and molecular variation in specimens of M. cantiana collected in northern France and the Netherlands in order to clarify their relations to the British and Italian populations; 2) to test the hypothesis that the English, French and Dutch populations originated from the same introduced propagules.

Materials and methods

Taxonomic samples

Specimens from ten French and two Dutch populations of Monacha cantiana were considered for analysis of the variability of their molecular and morphological (shell and genitalia) features (Table 1, Fig. 1). Specimens from four new British and one new Italian population were used for comparative molecular analysis with other populations of M. cantiana s.l. (Table 1, Fig. 1). Sequences deposited in GenBank for M. cantiana s.l. from other populations (Manganelli et al. 2005; Duda et al. 2011; Kruckenhauser et al. 2014; Cadahia et al. 2014; Pieńkowska et al. 2015, 2018b, 2019a, 2019b; Razkin et al. 2015; Neiber and Hausdorf 2017; Čejka et al. 2020, 2022) and three other Monacha species (M. cartusiana: Pieńkowska et al. 2015, 2022; Neiber and Hausdorf 2017; Caro et al. 2019; Čejka et al. 2020; M. pantanellii (De Stefani, 1879): Pieńkowska et al. 2020; M. parumcincta (Rossmässler, 1834): Pieńkowska et al. 2018b) were also selected for molecular analysis (Suppl. materials 14) and supplemented with several new sequences of mitochondrial (16SrDNA) and nuclear (ITS2 flanked with 5.8SrDNA and 28SrDNA) genes (Table 1). Sequences of Trochulus hispidus (Linnaeus, 1758) deposited in GenBank by Neiber et al. (2017), Neiber and Hausdorf (2017), Caro et al. (2019) and Proćków et al. (2021) were used as an outgroup to construct phylogenetic trees (Suppl. materials 14). The localities for reference populations of M. cantiana s.l. CAN-1 – CAN-6, M. pantanellii, M. cartusiana, and M. parumcincta were shown on maps published in our previous papers (Pieńkowska et al. 2018b: fig. 63, 2020: fig. 1).

Table 1.

List of localities of Monacha cantiana s.l. populations used for molecular and morphological (SH shell, AN genitalia) research.

Localities Current taxonomy Clade Designation of DNA voucher sps COI Long 16SrDNA H3 5.8SrDNA + ITS2 + 28SrDNA PCA and RDA Figs
No. coordinates country and site collector / date / no. of specimens (collection) new haplotype GenBank ## new haplotype GenBank ## new haplotype GenBank ## new haplotype GenBank ##
1 50°47'56.7"N, 02°00'57.5"E France, Pas-de-Calais, Bonningues-lès-Ardres, vegetation under shrubs, 42 m a.s.l. M. Proćków / 20.06.2018 / 5 (MNHW* F.18.13) M. cantiana CAN-1 Ard1 16S 1 OR918363 H3 1 OR939858 ITS2 1 OR917347 AN
Ard2 COI 1 OR918493 16S 1 OR918364 H3 2 OR939859 ITS2 2 OR917348 AN
Ard3 16S 1 OR918365 H3 1 OR939860 ITS2 1 OR917349
Ard4 COI 1 OR918494 16S 2 OR918366 H3 1 OR939861 ITS2 1 OR917350
Ard5 H3 3 OR939862
2 50°49'28.1"N, 01°44'01.9"E France, Pas-de-Calais, Blecquenecques n. Marquise, roadside, 26 m a.s.l. M. Proćków / 20.06.2018 / 5 (MNHW F.18.10) M. cantiana CAN-1 Ble1 COI 1 OR918495 16S 3 OR918367 H3 1 OR939863 SH/AN SH/AN
Ble2 COI 1 OR918496 16S 1 OR918368 H3 1 OR939864 ITS2 3 OR917351
Ble4 COI 1 OR918497 16S 3 OR918369 H3 1 OR939865
Ble5 COI 1 OR918498 H3 1 OR939866 ITS2 4 OR917352
3 50°40'56.7"N, 02°03'39.1"E France, Pas-de-Calais, Larré, vegetation along stream, 65 m a.s.l. M. Proćków / 20.06.2018 / 5 (MNHW F.18.14) M. cantiana CAN-1 Lar1 COI 1 OR918499 16S 3 OR918370 H3 3 OR939867 ITS2 5 OR917353
Lar2 COI 2 OR918500 16S 4 OR918371 H3 1 OR939868 ITS2 6 OR917354
Lar3 COI 1 OR918501 16S 4 OR918372 H3 1 OR939869 ITS2 1 OR917355
Lar4 COI 3 OR918502 H3 4 OR939870 ITS2 7 OR917356
Lar5 COI 1 OR918503 16S 4 OR918373 H3 1 OR939871 ITS2 7 OR917357
4 50°47'48.2"N, 01°56'34.4"E France, Pas-de-Calais, Licques, vegetation along road, 81 m a.s.l. M. Proćków / 20.06.2018 / 5 (MNHW F.18.12) M. cantiana CAN-1 Lic1 COI 1 OR918504 16S 1 OR918374 H3 1 OR939872 ITS2 1 OR917358
Lic2 COI 1 OR918505 16S 3 OR918375 H3 1 OR939873 ITS2 8 OR917359
Lic3 16S 5 OR918376 H3 3 OR939874 ITS2 1 OR917360
Lic4 COI 1 OR918506 16S 5 OR918377 H3 1 OR939875 ITS2 9 OR917361
Lic5 COI 1 OR918507 16S 1 OR918378 H3 1 OR939876 ITS2 1 OR917362
5 49°54'23.6"N, 01°30'58.9"E France, Seine-Maritime, Béthencourt n. Grandcourt, vegetation under trees, 97 m a.s.l. M. Proćków / 23.06.2018 / 5 (MNHW F.18.22) M. cantiana CAN-1 Bet1 COI 1 OR918508 16S 3 OR918379 H3 1 OR939877 ITS2 10 OR917363 SH/AN SH/AN
Bet2 COI 1 OR918509 H3 1 OR939878 ITS2 11 OR917364
Bet3 16S 6 OR918380 H3 1 OR939879
Bet4 COI 1 OR918510 16S 6 OR918381 H3 1 OR939880 ITS2 12 OR917365
Bet5 COI 1 OR918511 16S 3 OR918382 H3 1 OR939881 ITS2 13 OR917366
6 49°55'05.6"N, 01°31'38.1"E France, Seine-Maritime, Pierrepont, forest edge, 146 m a.s.l. M. Proćków / 23.06.2018 / 5 (MNHW F.18.21) M. cantiana CAN-1 Pie1 COI 1 OR918512 16S 3 OR918383 H3 1 OR939882 ITS2 14 OR917367 SH/AN SH/AN
Pie2 COI 1 OR918513 H3 1 OR939883 ITS2 1 OR917368
Pie3 COI 1 OR918514 H3 1 OR939884
Pie4 COI 1 OR918515 16S 3 OR918384 H3 1 OR939885 ITS2 15 OR917369
7 50°04'05.1"N, 01°52'20.9"E France, Somme, Épagne-Épagnette, roadside, 13 m a.s.l. M. Proćków / 19.06.2018 / 5 (MNHW F.18.08) M. cantiana CAN-1 Epa1 COI 1 OR918516 16S 7 OR918385 H3 3 OR939886 ITS2 16 OR917370 SH/AN AN
Epa2 COI 1 OR918517 16S 3 OR918386 H3 1 OR939887 ITS2 1 OR917371
Epa3 COI 4 OR918518 H3 1 OR939888 ITS2 17 OR917372
Epa4 16S 8 OR918387 H3 5 OR939889 ITS2 18 OR917373
Epa5 COI 1 OR918519 16S 9 OR918388 H3 1 OR939890
8 50°16'54.7"N, 01°37'41.9"E France, Somme, Froise, forest edge, 86 m a.s.l. M. Proćków / 19.06.2018 / 5 (MNHW F.18.20) M. cantiana CAN-1 Fro1 16S 4 OR918389 H3 2 OR939891
Fro2 COI 1 OR918520 16S 10 OR918390 H3 1 OR939892 ITS2 19 OR917374
Fro3 COI 1 OR918521 16S 11 OR918391 H3 1 OR939893 ITS2 1 OR917375
Fro4 COI 1 OR918522 16S 12 OR918392 H3 1 OR939894
Fro5 COI 1 OR918523 16S 13 OR918393 H3 2 OR939895
9 49°44'14.7"N, 01°47'53.9"E France, Oise, Escales-Saint-Pierre, roadside, 164 m a.s.l. M. Proćków / 19.06.2018 / 5 (MNHW F.18.06) M. cantiana CAN-1 Esc1 COI 1 OR918524 16S 14 OR918394 H3 1 OR939896 ITS2 20 OR917376 SH/AN SH/AN
Esc2 COI 1 OR918525 H3 2 OR939897 ITS2 21 OR917377
Esc3 COI 1 OR918526 16S 14 OR918395 H3 6 OR939898 ITS2 22 OR917378
Esc4 COI 1 OR918527 H3 1 OR939899 ITS2 23 OR917379
Esc5 COI 1 OR918528 16S 15 OR918396 H3 6 OR939900 ITS2 17 OR917380
10 49°27'38.2"N, 02°03'35.0"E France, Oise, Fouquenies, vegetation along forest road, 29 m a.s.l. M. Proćków / 19.06.2018 / 5 (MNHW F.18.05) M. cantiana CAN-1 Fou1 COI 1 OR918529 16S 3 OR918397 H3 3 OR939901 ITS2 24 OR917381
Fou2 COI 5 OR918530 16S 16 OR918398 H3 1 OR939902 ITS2 1 OR917382
Fou3 16S 3 OR918399 H3 7 OR939903
Fou4 16S 17 OR918400 H3 7 OR939904 ITS2 25 OR917383
Fou5 COI 1 OR918531 16S 18 OR918401 H3 1 OR939905 ITS2 26 OR917384
11 51°32'57.0"N,, 03°39'27.9"E The Netherlands, Veere, edge of forest, 15 m a.s.l. M. Proćków / 6.06.2019/ 5 (MNHW NL.19.02) M. cantiana CAN-1 Vee1-1 COI 1 OR918532 16S 19 OR918402 H3 1 OR939906
Vee1-2 COI 1 OR918533 16S 1 OR918403 H3 8 OR939907
Vee1-3 COI 1 OR918534 16S 3 OR918404 H3 1 OR939908
Vee1-4 COI 1 OR918535 16S 19 OR918405 H3 1 OR939909
Vee1-5 COI 6 OR918536 16S 3 OR918406 H3 1 OR939910
12 51°32'57.1"N,, 03°39'40.1"E The Netherlands, Veere 6, vegetation near windmill, 81 m a.s.l. M. Proćków / 7.06.2019/ 5 (MNHW NL.19.07) M. cantiana CAN-1 Vee2-1 16S 3 OR918407 H3 1 OR939911
Vee2-2 COI 7 OR918537 16S 3 OR918408 H3 5 OR939912
Vee2-3 COI 1 OR918538 16S 19 OR918409 H3 1 OR939913
Vee2-4 COI 1 OR918539 16S 3 OR918410 H3 1 OR939914
Vee2-5 OR918540 16S 3 OR918411 H3 1 OR939915
13. 50°46'23.5"N, 01°50'06.3"W United Kingdom, Hurn, vegetation along road, 7 m a.s.l. M. Proćków / 15.06.2022/ 2 (MNHW GB.22.04) M. cantiana CAN-1 Hum1 16S 1 OR918412 H3 1 OR939916 ITS2 1 OR917385
Hum2 COI 8 OR918541 H3 9 OR939917
14. 51°17'43.7"N, 01°29'34.9"W United Kingdom, Vernhams Dean, vegetation along shaded path, 136 m a.s.l. M. Proćków / 15.06.2022/ 4 (MNHW GB.22.05) M. cantiana CAN-1 Ver1 16S 3 OR918413 H3 9 OR939918 ITS2 1 OR917386
Ver2 16S 3 OR918414 H3 9 OR939919 ITS2 1 OR917387
Ver3 H3 10 OR939920 ITS2 27 OR917388
Ver4 16S 3 OR918415 H3 1 OR939921 ITS2 1 OR917389
15. 51°17'32.3"N, 01°29'10.9"W United Kingdom, Upton, vegetation along road, 120 m a.s.l. M. Proćków / 15.06.2022/ 2 (MNHW GB.22.06) M. cantiana CAN-1 Upt1 16S 3 OR918416 H3 1 OR939922 ITS2 1 OR917390
Upt2 16S 3 OR918417 H3 1 OR939923 ITS2 1 OR917391
16. 55°02'13.6"N, 01°42'51.0"W United Kingdom, Newcastle upon Tyne, vegetation near airport, 80 m a.s.l. M. Proćków / 15.06.2022/ 6 (MNHW GB.22.07) M. cantiana CAN-1 New1 COI 9 OR918542 16S 20 OR918418 H3 9 OR939924 ITS2 1 OR917392
New2 16S 20 OR918419 H3 9 OR939925 ITS2 1 OR917393
New3 COI 10 OR918543 16S 20 OR918420 H3 9 OR939926 ITS2 1 OR917394
New4 COI 9 OR918544 16S 20 OR918421 H3 1 OR939927 ITS2 1 OR917395
New5 COI 1 OR918545 16S 3 OR918422 H3 9 OR939928 ITS2 1 OR917396
New6 COI 9 OR918546 16S 20 OR918423 H3 1 OR939929 ITS2 1 OR917397
17. 53°31'29"N, 01°27'54"W United Kingdom, Barrow near Barnsley R.A.D. Cameron / 10.2011 / 5 (FGC* 40329) M. cantiana CAN-1 8FG-1 MG208884 16S 1 OR918424 MG209031 ITS2 1 OR917398
8FG-2 MG208885 16S 1 OR918425 MG209032 ITS2 1 OR917399
18. 53°25'04.2"N, 01°24'00.5"W United Kingdom, Rotherham R.A.D. Cameron / 07.2015 / 7 (DCBC*) M. cantiana CAN-1 Sit1-1 MG208893 16S 1 OR918426 MG209035 ITS2 28 OR917400
19. 53°24'49.1"N, 01°24'36.6"W United Kingdom, Sheffield R.A.D. Cameron / 07.2015 / 6 (DCBC) M. cantiana CAN-1 Sit2-1 MG208899 16S 21 OR918427 MG209038 ITS2 1 OR917401
20 42°28'41.05"N, 13°05'09.46"E Italy, Latium, Gole del Velino, near Sigillo (Posta, Rieti) A. Hallgass / 30.09.2012 / 8 (FGC 42960) M. cantiana CAN-1 4FG-1 MG208905 16S 24 OR918428 MG209039 ITS2 29 OR917402
4FG-2 MG208910 16S 25 OR918429 MG209042 ITS2 29 OR917403
21. 42°43'39.87"N, 13°16'01.44"E Italy, Latium, Valle del Tronto (Accumoli, Rieti) A. Hallgass / 30.09.2012 / 4 (FGC 42963) M. cantiana CAN-1 Tro1 MG208921 16S 26 OR918430 MG209043 ITS2 1 OR917404
22. 42°07'53.39"N, 13°01'39.81"E Italy, Latium, Valle del Turano, near Turania (Rieti) A. Hallgass / 04.11.2013 / 2 (FGC 42969) M. cantiana CAN-1 Tur5-1 MG208923 16S 27 OR918431 MG209048 ITS2 29 OR917405
Tur5-2 MG208924 16S 28 OR918432
23. 43°44'26.18"N, 12°17'13.71"E Italy, Tuscany, Sasso di Simone, Rifugio Casa del Re (Sestino, Arezzo) G. Manganelli / 21.10.2017 / 4 (FGC 47484) M. cantiana CAN-2 Sim-1 COI 11 OR918547 16S 22 OR918433 H3 1 OR939930
Sim-2 COI 11 OR918548 16S 23 OR918434 H3 1 OR939931
24. 45°11'59.85"N, 10°58'49.30"E Italy, Venetum, Sorgà (Verona) A. Hallgass / 09.2012 / 6 (FGC 42964) M. cantiana CAN-2 12FG-1 MG208925 16S 29 OR918435 MG209050 ITS2 30 OR917406
12FG-2 MG208928 16S 30 OR918436 H3 1 OR939932 ITS2 31 OR917407
25. 48°15'25.50"N, 16°30'46.38"E Austria, Breitenlee, abandoned railway station M. Duda / 09.2015 / 3 (FGC 44020) M. cantiana CAN-3 Dud-2 MG208938 16S 31 OR918437 MG209056 ITS2 32 OR917408
26. 43°46'11.79"N, 07°22'21.50"E France, Alpes-Maritimes, Vallée de Peillon, Sainte Thècle A. Hallgass / 24.10.2011/ 5 (FGC 40320) M. cemenelea CAN-4 3FG-1 MG208939 16S 32 OR918438 MG209058 ITS2 33 OR917409
3FG-2 MG208940 16S 32 OR918439 MG209059 ITS2 34 OR917410

Material examined

The material examined originated from the populations listed in Table 1 with the following data: geographic coordinates, country and region, short description of collection site, name of collector, date, number of specimens studied and the collection where the material is stored (in brackets). The origin of the material used for comparison has been described in previous publications (Pieńkowska et al. 2015: appendix 1; Pieńkowska et al. 2018b, 2019a, 2019b, 2020, 2022: table 1).

Morphological study

Sixty-six specimens of the six lineages of M. cantiana s.l. (CAN-1, CAN-2, CAN-3, CAN-4, CAN-5, and CAN-6) (Pieńkowska et al. 2018b, 2019a) and five specimens suitable for morphological analysis of the French populations were considered for shell variability (Table 1). Twelve shell variables were measured to the nearest 0.1 mm using ADOBE PHOTOSHOP 7.0.1 on digital images of standard apertural and umbilical views taken with a Canon EF 100 mm 1:2.8 L IS USM macro lens mounted on a Canon F6 camera (see also Pieńkowska et al. 2018b: fig. 1):

AH aperture height,

AW aperture width,

LWfW last whorl final width,

LWmW last whorl medial width,

LWaH height of adapical sector of last whorl,

LWmH height of medial sector of last whorl,

PWH penultimate whorl height,

PWfW penultimate whorl final width,

PWmW penultimate whorl medial width,

SD shell diameter,

SH shell height,

UD umbilicus diameter.

Sixty-four specimens of the six lineages of M. cantiana s.l. (CAN-1, CAN-2, CAN-3, CAN-4, CAN-5 and CAN-6) (Pieńkowska et al. 2018b, 2019a) and seven adult specimens of the French populations were analysed for anatomical variability (Table 1). Snail bodies were dissected under a light microscope (Wild M5A or Zeiss SteREO Lumar V12). Anatomical details were drawn using a Wild camera lucida. Abbreviations/acronyms are as follows (see also Pieńkowska et al. 2018b: fig. 2):

Figure 2. 

Shells of Monacha cantiana from France. Specimen Esc1 from Oise, Escales-Saint-Pierre (A), specimen Ble1 from Pas-de-Calais, Blecquenecques n. Marquise (B), specimen Pie1 from Seine-Maritime, Pierrepont (C) and specimen Bet1 from Seine-Maritime, Béthencourt n. Grandcourt (D).

BC bursa copulatrix,

BW body wall,

DBC duct of bursa copulatrix,

DG digitiform glands,

E epiphallus (from base of flagellum to beginning of penial sheath),

F flagellum,

FO free oviduct,

GA genital atrium,

GAR genital atrium retractor,

P penis,

PP penial papilla,

SOD spermoviduct,

V vagina,

VA vaginal appendix (also known as appendicula),

VAS vaginal appendix sac,

VD vas deferens.

Six anatomical variables (DBC, E, F, P, V, VA) were measured using a calliper under a light microscope (0.01 mm) (Pieńkowska et al. 2018b: fig. 2).

Detailed methods of multivariate ordination by Principal Component Analysis (PCA) and Redundancy Analysis (RDA), performed on the original shell and genitalia matrices as well as on the Z-matrices (shape-related matrices), are described in our previous papers (Pieńkowska et al. 2018b, 2019a).

We used 95% confidence interval ellipses to evaluate the uncertainty of the estimate of the population mean (centroid) of the data sample. The function ordiellipse with standard errors in the package vegan (Oksanen et al. 2022) was used. Convex hulls (function ordihull in vegan) were used to visually enclose the individuals forming each clade as a measure of data spread. All analyses were performed with RStudio (R version 4.2.1; R Core Team 2021).

Molecular study

Eighty-eight specimens representing 26 populations of the four lineages of M. cantiana s.l. (CAN-1, CAN-2, CAN-3, and CAN-4; Pieńkowska et al. 2018b, 2019a) were used for molecular analysis (Table 1). Molecular methods including DNA extraction, amplification and sequencing are described in our previous paper (Pieńkowska et al. 2018a).

Two mitochondrial and two nuclear gene fragments were analysed, namely cytochrome c oxidase subunit 1 (COI), 16S ribosomal DNA (16SrDNA), histone 3 (H3) and an internal transcribed spacer 2 of rDNA (ITS2) flanked by the 3’end of 5.8SrDNA and the 5’end of 28SrDNA, respectively. Sequences were edited by eye using BioEdit, v. 7.0.6 (Hall 1999; BioEdit 2017) and aligned using ClustalW, implemented in BioEdit (Thompson et al. 1994). Fragments of COI were amplified using two pairs of primers: F01/R04 (Dabert et al. 2010) or bcsmF1/bcsmR1 (Proćków et al. 2013). Fragments of 16SrDNA were amplified using 16Scs1/16Scs2 primers (Chiba 1999). Sequences containing the 3’end of 5.8SrDNA, complete sequence of ITS2 and 5’end of 28SrDNA were amplified using two sets of primers: LSU1/LSU3 (Wade and Mordan 2000) and NEWS2/ITS2-RIXO (Almeyda-Artigas et al. 2000). Products of the two PCR reactions were aligned and used to assemble single sequences. Fragments of H3 gene were amplified using the primers H3F and H3R (Colgan et al. 1998). The protein coding sequences were aligned according to the translated amino acid sequences. The ends of all sequences were trimmed. After trimming, the lengths of sequences were 615 bp for COI, 804–821 bp for 16SrDNA, 303 bp for H3, and 749–753 bp for ITS2 flanked by the 3’end of 5.8SrDNA and 5’end of 28SrDNA (including 45 bp 5.8SrDNA + 489–493 bp ITS2 + 215 bp 28SrDNA). The borders of ITS2 sequence were searched using ITS2-Database (http://its2.bioapps.biozentrum.uni-wuerzburg.de) (Eddy 1998; Koetschan et al. 2010). The sequences were collapsed to haplotypes using the programme ALTER (Alignment Transformation EnviRonment) (Glez-Peña et al. 2010). The following alignments were made for phylogenetic inference: 591 bp long for COI, 292 or 809 positions long for 16SrDNA, and 775 positions long for ITS2 flanked by the 3’end of 5.8SrDNA and 5’end of 28SrDNA. Finally, the sequences of COI, 16SrDNA, ITS2, and H3 were concatenated. Three sets of concatenated sequences were created: 1) COI16S of 1444 positions in length (615 COI + 829 16SrDNA); 2) H3ITS2 of 1054 positions in length (279 H3 + 775 ITS2 with flanks); 3) CS of 2498 positions in length (615 COI + 829 16SrDNA + 279 H3 + 775 ITS2 with flanks).

Estimates of genetic distances between the COI sequences obtained in this study and other sequences from GenBank were conducted with MEGA7 using the Kimura two-parameter model (K2P) (Kimura 1980). All positions containing gaps and missing data were eliminated. There were a total of 591 positions in the final dataset. The analysis involved 53 nucleotide sequences.

To infer the phylogenetic relationships the following programmes were used: MEGA7 (Hasegawa et al. 1985; Nei and Kumar 2000; Kumar et al. 2016), IQ-Tree (http://iqtree.cibiv.univie.ac.at/) (Trifinopoulos et al. 2016), RAxML v1.0.0 (Stamatakis 2014) and MrBayes 3.2.6 (Ronquist et al. 2012). For phylogenetic inference Neighbour-Joining, Maximum-Likelihood and Bayesian Inference methods were used.

For each alignment file, best nucleotide substitution models were specified according to the Bayesian Information Criterion (BIC) (see captions to figures). Phylogenetic analyses performed with IQ-Tree, RAxML and MrBayes for three sets of concatenated sequences were done dividing the data set into 2 or 4 partitions: (1) COI, (2) 16SrDNA or (1) COI, (2) 16SrDNA, (3) H3, (4) 5.8SrDNA + ITS2 + 28SrDNA. Best substitution models were inferred according to the Bayesian Information Criterion (BIC) for each of the partitions by MODELFINDER (Kalyaanamoorthy et al. 2017) implemented in IQ-TREE. Bayesian analysis were conducted with four Monte Carlo Markov chains running for 1 million generations, sampling every 100 generations (the first 25% of trees were discarded as ‘burn-in’).

The robustness of the NJ and ML trees generated by MEGA7 were assessed by bootstrap analysis with 1000 replicates (Felsenstein 1985). ML trees built by RAxML were tested by bootstrap analysis with 100 replicates. ML trees obtained with IQ-Tree were constructed under 1000 ultrafast bootstrap replicates (Minh et al. 2013). Finally, BI trees were supported by posterior probability (PP) values. Bootstrap support values from NJ and ML analysis as well as posterior probability (PP) values obtained on 50% majority rule consensus Bayesian tree were mapped onto the ML tree obtained by MEGA7. All the resulting trees were rooted with Trochulus hispidus sequences obtained from GenBank.

Results

Morphological study: shell

Shells of French specimens of M. cantiana (Fig. 2A–D) are globose-subglobose in shape, variable in size and usually whitish or pale yellowish in colour, with slightly descending, roundish to oval aperture, similar to those of the other populations of the lineage CAN-1 (Pieńkowska et al. 2018b: figs 8–11).

RDA with French specimens and “lineage” constraint on the shape and size matrix (Fig. 3B, C) showed that RDA 1 (22.2%, P < 0.01) separated CAN-6 from CAN-4, with CAN-5 and the large group CAN-1, CAN-2, CAN-3, and FRA in intermediate position, as confirmed by 95% confidence interval ellipses (Fig. 3B). The convex hull measure of data spread showed considerable overlap of some clusters. In both cases, FRA specimens fell within CAN-1 variability (Fig. 3B). The preliminary classic PCA showed that size was the first major source of morphological variation, since PC1 (69%) was a positive combination of all variables (Fig. 3A). On the contrary, RDA 2 was not significant (p > 0.05) and accounted for little morphological variation (2.6%). PC2 (15%) mostly reflected a contrast between LWaH and PWH versus LWmH and UD.

Figure 3. 

Analysis of French specimens with “lineage” constraint on the original matrix (A–C) and Z-matrix (shape-related) (D–F) of selected shell sections. Principal component analysis (PCA) (A, D) and redundancy analysis (RDA) with groups shown as ellipses representing 95% confidence intervals with standard errors (B, E) and as convex hull polygons (C, F).

RDA on the shape (Z) matrix (Fig. 3E, F) showed that RDA 1 (34%, P < 0.001) clearly separated CAN-5 and CAN-6 from the group CAN-1, CAN-2, CAN-3, CAN-4, and FRA, as confirmed by the 95% confidence interval ellipses (Fig. 3E) and the convex hulls (Fig. 3F). On the contrary, the RDA2 axis was not significant (P > 0.05), reflecting little morphological variation (5.3%). Shape-related PCA indicated that SH, LWaH and PWH vs LWmW, SD, LWfW, LWmH, and UD were the principal shape determinants on PC1, and AH and AW vs PWH, LWmH, and UD on PC2 (Fig. 3D).

Morphological study: anatomy

French specimens of M. cantiana have distal genitalia (Figs 46) resembling the other populations assigned to CAN-1, which are in turn similar to those of the populations belonging to the CAN-2, CAN-3 and CAN-4 lineages (Pieńkowska et al. 2018b: figs 20–30).

Figure 4. 

Distal genitalia of Monacha cantiana from France. Specimen Bet1 from Seine-Maritime, Béthencourt n. Grandcourt (A–C) and specimen Ble1 from Pas-de-Calais, Blecquenecques n. Marquise (D–F). Distal genitalia (A, D), transverse sections of medial epiphallus (B, E) and apical penial papilla (C, F).

Figure 5. 

Distal genitalia genitalia of Monacha cantiana from France. Specimen Esc1 from Oise, Escales-Saint-Pierre (A–C) and specimen Epa1 from Somme, Épagne-Épagnette, roadside (D). Distal genitalia (A), transverse sections of medial epiphallus (B), apical penial papilla (C) and internal structure of distal genitalia (D).

Figure 6. 

Distal genitalia of of Monacha cantiana from France. Specimen Pie1 from Seine-Maritime, Pierrepont. Distal genitalia (A), transverse sections of medial epiphallus (B), apical penial papilla (C) and internal structure of distal genitalia (D).

RDA with French specimens and “lineage” constraint on the shape and size matrix (Fig. 7B, C) showed that RDA 1 (24.3%, P < 0.001) separated CAN-2 and CAN-6 from FRA and CAN-5, with CAN-1, CAN-3, CAN-4 in intermediate position, as confirmed by 95% confidence interval ellipses (Fig. 7B). The preliminary classic PCA showed that size was the first major source of morphological variation, since PC1 (48.3%) was a positive combination of all variables (Fig. 7A). On the other hand, RDA 2 (21.7%, P < 0.001) clearly separated the group CAN-1, CAN-2, CAN-3, CAN-4 and FRA from CAN-5 and CAN-6. PC2 (17.9%) reflected a contrast between P, VA and DBC vs F and V. Differences between clusters were confirmed visually by 95% confidence interval ellipses (Fig. 7B) and convex hulls (Fig. 7C).

Figure 7. 

Analysis of French specimens with “lineage” constraint on the original matrix (A–C) and Z-matrix (shape-related) (D–F) of selected genital sections. Principal component analysis (PCA) (A, D) and redundancy analysis (RDA) with groups shown as ellipses representing 95% confidence intervals with standard errors (B, E) and as convex hull polygons (C, F).

RDA on the shape (Z) matrix (Figs 7E, F) showed that RDA 1 (33.7%, P < 0.001) separated the 95% confidence interval ellipses of CAN-5, CAN-6 and CAN-4 from the large group CAN-1, CAN-2, CAN-3, and FRA; RDA 2 (8%, P < 0.001) separated CAN-5 and the group CAN-1, CAN-2, CAN-3, FRA from CAN-6 and CAN-4 (Fig. 7E). Convex hulls showed some overlaps, especially in the data spread of CAN-1 (Fig. 7F). Shape-related PCA indicated that P and E vs VA and F were the two principal shape determinants on PC1 and DBC and VA vs V and F on PC2 (Fig. 7D).

Molecular study

Although sequences of all the genes analysed (COI, 16SrDNA, H3, and ITS2 with 5.8SrDNA and 28SrDNA) were not obtained from all 88 specimens (Table 1), as a result of molecular analysis, 272 new sequences were deposited in GenBank. These were 56 new sequences of COI: OR918493OR918548, 77 of 16SrDNA (long): OR918363OR918439, 75 of H3: OR939858OR939932 and 64 of ITS2 (with flanking fragments of 5.8SrDNA and 28SrDNA): OR917347OR917410 (Table 1). Eleven haplotypes of the COI gene were identified (COI 1 – COI 11), 32 of 16SrDNA (16S 1 – 16S 32), 10 of H3 (H3 1 – H3 10), and 34 of ITS2 with flanking sequences (ITS2 1 – ITS2 34) (Table 1). These haplotypes were used for phylogenetic analysis based on single gene sequences and concatenated mitochondrial and nuclear gene data sets of sequences.

The phylogenetic analysis of COI sequences obtained from the specimens and comparative sequences derived from GenBank is shown in Fig. 8. The results are consistent with previously published findings (Pieńkowska et al. 2018b, 2019a, 2019b, 2020, 2022), distinguishing six lineages (CAN-1 – CAN-6) in M. cantiana s.l. that clustered separately from COI sequences of other species including M. parumcincta, M. pantanellii and M. cartusiana. The new COI sequences (haplotypes 1–10) from France, the Netherlands and England clustered in the CAN-1 lineage. Only the COI 11 haplotype obtained from two specimens of the Italian population from Sasso di Simone (population no. 23 in Table 1) grouped with the CAN-2 lineage.

Figure 8. 

Maximum Likelihood (ML) tree of COI haplotypes of Monacha cantiana. New COI sequences of M. cantiana (Table 1) were compared with COI sequences of M. cantiana s.l., M. parumcincta, M. pantanellii and M. cartusiana obtained from GenBank (Suppl. material 1). Sequences were cut to 591 bp. HKY+G+I was the best nucleotide substitution model according to the Bayesian Information Criterion (BIC). The tree was rooted with Trochulus hispidus sequences obtained from GenBank (Suppl. material 1).

K2P genetic distances (Table 2) showed small genetic differentiation between COI sequences of particular CAN-1 populations (infra-populational distances ranged from 0.2% in Dutch populations to 1.1% in French populations). The K2P distances between these populations were also small (in the range 0.5–1.2%). The K2P distances between French, Dutch, English and Italian populations of CAN-1 and CAN-2 were also small (in the range 3.5–4.1%) while the distance separating the CAN-1 populations from the CAN-3 and CAN-4 populations was much larger (in the range 18.0–18.8%). In turn, the distance separating the CAN-3 and CAN-4 populations was 5.6–6.1%.

Table 2.

K2P genetic distances between COI sequences of the populations analysed.

1 2 3 4 5 6 7 8
M. cantiana CAN-1 of French populations 1 1.1
M. cantiana CAN-1 of Dutch populations 2 0.7 0.2
M. cantiana CAN-1 of English populations 3 0.9 0.5 0.7
M. cantiana CAN-1 of Italian populations 4 1.2 0.8 0.9 0.6
M. cantiana CAN-2 of Italian populations 5 4.1 3.7 3.8 3.5 2.4
M. cantiana s.l. CAN-3 of Italian populations 6 18.7 18.6 18.6 18.5 18.3 1.0
M. cantiana s.l. CAN-3 of Austrian populations 7 18.8 18.7 18.7 18.7 18.5 1.5 1.0
M. cantiana s.l. CAN-4 (M. cemenelea) of French populations 8 18.3 18.2 18.1 18.0 18.6 5.6 6.1 0.9

Results similar to those of COI analysis were obtained for other single gene analyses (Suppl. materials 8, 9 for 16SrDNA, Suppl. material 10 for the ITS2 gene with flanking 5.8S and 28S gene fragments). Note that the newly obtained 16SrDNA sequences in Suppl. material 8 were trimmed to 292 positions in alignment length because GenBank lacks the reference long 16SrDNA sequences of the 809 positions used to construct the tree in Suppl. material 9. Analysis of newly obtained longer sequences (i.e. ITS2 flanked by 5.8SrDNA and 28SrDNA gene fragments) (ITS2 1 – ITS2 34 haplotypes) and the only comparable sequence of Neiber and Hausdorf (2017) showed that this gene did not differentiate the CAN-1, CAN-2 and CAN-3 lineages. Similar results were obtained previously using ITS2 gene sequences without flanking fragments of 5.8SrDNA and 28SrDNA (Pieńkowska et al. 2018b: fig. 64). Only in the case of sequences assigned to the CAN-4 lineage were they distinct from CAN-1, CAN-2 and CAN-3, as shown in Pieńkowska et al. (2018b: fig. 64).

The phylogenetic tree for concatenated sequences were similar in ML analyses obtained with different software. The tree for mitochondrial gene sequences (COI+16SrDNA) in Fig. 9 shows that the sequences obtained from specimens of the French, Dutch, and English populations (see also Suppl. material 5) grouped with the reference sequences for CAN-1. In a tree of concatenated nuclear genes (Fig. 10: H3+ITS2 with flanks), the sequences from the French populations grouped with CAN-1, CAN-2, and CAN-3 lineages, only sequences of the CAN-4 lineage being distinguished. However, note that the bootstrap and posterior probability values weakly supported the results of the concatenated H3+ITS2 gene sequences. The tree for the concatenated sequences of all the genes analysed in this paper (Fig. 11, see also Suppl. material 7) showed that concatenated sequences CS 1–CS 25 from northern French populations clustered together with CS 26–CS 34 and CS 35–CS 38 sequences obtained from English and Italian specimens, respectively. They all belonged to the CAN-1 lineage. The CAN-1, CAN-2, CAN-3, and CAN-4 lineages grouped separately.

Figure 9. 

Maximum Likelihood (ML) tree of concatenated COI and 16SrDNA haplotypes of Monacha cantiana. New COI and 16SrDNA sequences of M. cantiana (Table 1, Suppl. material 5) were compared with concatenated COI and 16SrDNA sequences of M. cantiana s.l. and M. cartusiana obtained from GenBank (Suppl. materials 1, 2, 5). Length of sequences was 1444 positions (615 of COI + 829 of 16SrDNA). The Bayesian Information Criterion (BIC) specified T92+G+I the best nucleotide substitution model in MEGA7, or HKY+F+G4 for COI and TIM2+F+G4 for 16SrDNA partition in IQ-Tree, RAxML and MrBayes. Numbers next to main branches indicate (left to right): bootstrap supports above 50% calculated by NJ-MEGA7 (Saitou and Nei 1987), ML-MEGA7 (Kumar et al. 2016), IQ-Tree (Trifinopoulos et al. 2016), RAxML (Stamatakis 2014), and posterior probabilities by BI (Ronquist et al. 2012). The tree was rooted with Trochulus hispidus concatenated sequences obtained from GenBank (Suppl. material 5).

Figure 10. 

Maximum Likelihood (ML) tree of concatenated H3 and ITS2 (flanked with 5.8S and 28SrDNA) haplotypes of Monacha cantiana. New H3 and ITS2 sequences of M. cantiana (Table 1) were compared with concatenated H3 and ITS2 sequences of M. cantiana s.l. obtained from GenBank (Suppl. materials 3, 4). Length of sequences was 1054 positions (279 of H3 + 775 of ITS2). The Bayesian Information Criterion (BIC) specified T92+G+I the best nucleotide substitution model in MEGA7, or K2P+I for H3 and K3P+I for ITS2 partition in IQ-Tree, RAxML, and MrBayes. Numbers next to main branches indicate (left to right): bootstrap supports above 50% calculated by NJ-MEGA7 (Saitou and Nei 1987), ML-MEGA7 (Kumar et al. 2016), IQ-Tree (Trifinopoulos et al. 2016), RAxML (Stamatakis 2014) and posterior probabilities by BI (Ronquist et al. 2012). The tree was rooted with Trochulus hispidus concatenated sequences obtained from GenBank (Suppl. material 6).

Figure 11. 

Maximum Likelihood (ML) tree of concatenated COI, 16SrDNA, H3, and ITS2 (flanked with 5.8S and 28SrDNA) haplotypes of Monacha cantiana. COI, 16SrDNA, H3, and ITS2 sequences of M. cantiana were compared with sequences of M. cantiana s.l. and M. cartusiana obtained from GenBank (Suppl. materials 14, 7). Length of sequences was 2498 positions (615 of COI, 829 of 16SrDNA, 279 of H3, and 775 of ITS2). Bayesian Information Criterion (BIC) specified GTR+G+I the best nucleotide substitution model in MEGA7, or HKY+F+G4 for COI, TIM2+F+I for 16SrDNA, TIM3e+I+G4 for H3, and K3P+I+G4 for ITS2 partition in IQ-Tree, RAxML, and MrBayes. Numbers next to main branches indicate (left to right): bootstrap support above 50% calculated by NJ-MEGA7 (Saitou and Nei 1987), ML-MEGA7 (Kumar et al. 2016), IQ-Tree (Trifinopoulos et al. 2016), RAxML (Stamatakis 2014), and posterior probabilities by BI (Ronquist et al. 2012). The tree was rooted with Trochulus hispidus concatenated sequences obtained from GenBank (Suppl. material 7).

Discussion

At a first glance, the shells and genitalia of the French specimens do not differ from those of the other populations assigned to CAN-1, which in turn are similar to those of the populations of the CAN-2, CAN-3 and CAN-4 lineages (see Pieńkowska et al. 2018b). This was fully confirmed by RDA and PCA: the French specimens fell entirely in CAN-1 on the basis of shell characters (Fig. 3C, F), and almost entirely, based on anatomical characters (Fig. 7C, F).

The results of molecular analysis were consistent with those of morphological analysis (shell and genital structure). Both showed that the populations from northern France should be assigned to the CAN-1 lineage. In this sense, the molecular results complement the conclusions of Brulé and Bichain (2019). Consequently, their results corroborate the results of four previous papers on M. cantiana lineages and their phylogeography (Pieńkowska et al. 2018b, 2019a, 2019b, 2020).

Prior suggestions that M. cantiana was introduced into England in historical times (Kerney 1970, 1999; Evans 1972; Pieńkowska et al. 2018b) appear to be correct. This allows us to speculate that the Roman conquests also spread M. cantiana in northern France (as well as in the area of modern-day Holland). The slightly greater genetic diversity of French populations compared to the English ones (expressed as slightly larger K2P distances) indicates that M. cantiana reached northern France earlier than England. Simultaneously, the occurrence of the CAN-2 and CAN-3 lineages in Italy implies that M. cantiana populations diversified for longer in this area. Nevertheless, further analysis of M. cantiana, especially specimens from northern Italy, is needed to determine the relationships between the CAN-1/CAN-2 and CAN-3/CAN-4 lineages. Until these results are available, we refrain from proposing any nomenclatural taxonomic framework for these lineages.

Acknowledgements

We thank Jarosław Bogucki (Poznań, Poland) for drawing the map (Fig. 1), Giovanni Cappelli (Siena, Italy) for taking photographs of the shells (Fig. 2), and Helen Ampt (Siena, Italy) for revising the English. We also thank Italian Ministry of University and Research and Adam Mickiewicz University, Poznań (Poland) for financial support of our research.

Additional information

Conflict of interest

The authors have declared that no competing interests exist.

Ethical statement

No ethical statement was reported.

Funding

DB and GM were funded under the National Recovery and Resilience Plan (NRRP), Mission 4 Component 2 Investment 1.4 – Call for tender No. 3138 of 16 December 2021, rectified by Decree n.3175 of 18 December 2021 of Italian Ministry of University and Research funded by the European Union – NextGenerationEU; Award Number: Project code CN_00000033, Concession Decree No. 1034 of 17 June 2022 adopted by the Italian Ministry of University and Research, CUPB63C22000650007 Project title “National Biodiversity Future Center - NBFC”. AL received support from Adam Mickiewicz University, Poznań (Poland), funded project 526000/REZ_PROJEKT “Powrót do badań”.

Author contributions

Conceptualization: AL, FG and GM; Methodology, Formal analysis, Investigation, Data Curation on shell and genitalia: FG, DB and GM; Methodology, Formal analysis, Investigation, Data Curation on molecular data: AL, JRP, KS and MP; Writing - Original draft & Writing - Review and Editing: AL, FG and GM; Supervision: FG, AL and GM; Funding Acquisition: AL and GM.

Author ORCIDs

Joanna R. Pieńkowska https://orcid.org/0000-0003-0372-121X

Giuseppe Manganelli https://orcid.org/0000-0002-8453-280X

Małgorzata Proćków https://orcid.org/0000-0003-2240-7306

Debora Barbato https://orcid.org/0000-0003-1105-1711

Katarzyna Sosnowska http://orcid.org/0000-0002-7506-4231

Folco Giusti https://orcid.org/0000-0001-8722-4653

Andrzej Lesicki https://orcid.org/0000-0002-1924-1934

Data availability

All of the data that support the findings of this study are available in the main text or Supplementary Information.

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Supplementary materials

Supplementary material 1 

COI sequences from GenBank used for molecular analysis comparisons (haplotypes in bold)

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: docx

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (38.37 kb)
Supplementary material 2 

16SrDNA sequences from GenBank used for molecular analysis comparisons (haplotypes in bold)

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: docx

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (37.01 kb)
Supplementary material 3 

H3 sequences from GenBank used for molecular analysis comparisons (haplotypes in bold)

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: docx

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (34.64 kb)
Supplementary material 4 

ITS2 sequences from GenBank used for molecular analysis comparisons (haplotypes in bold)

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: docx

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (33.02 kb)
Supplementary material 5 

Concatenated sequences of COI+16SrDNA used in NJ/ML-MEGA7/IQ Tree/RAxML/BI analysis (Fig. 9)

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: docx

Explanation note: COI sequences were 615 bp in length. Long 16SrDNA sequences were cut to 829 positions (the alignment of concatenated sequences COI and long 16SrDNA was then 1444 positions in length).

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (38.72 kb)
Supplementary material 6 

Concatenated sequences of H3 + [(5.8SrDNA)+ITS2+(28SrDNA)] used in NJ/ML-MEGA7/IQ Tree/RAxML/BI analysis (Fig. 10)

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: docx

Explanation note: H3 sequences were cut to 279 bp, 5.8SrDNA+ITS2+28SrDNA sequences were 775 positions in length (the alignment of concatenated sequences H3 + [(5.8SrDNA)+ITS2+(28SrDNA)] was therefore 1054 positions).

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (38.76 kb)
Supplementary material 7 

Concatenated sequences of COI + 16SrDNA long + H3 + [(5.8SrDNA)+ITS2+(28SrDNA)] used in NJ/ML-MEGA7/ML-IQ Tree/RAxML/BI analysis (Fig. 11)

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: docx

Explanation note: The lengths of the particular sequences were COI 615 bp, 16SrDNA – 829 bp, H3 – 279 bp, 5.8SrDNA+ITS2+28SrDNA – 775 bp (the alignment of concatenated sequences COI + 16SrDNA long + H3 + [(5.8SrDNA)+ITS2+(28SrDNA)] was therefore 2498 positions).

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (40.04 kb)
Supplementary material 8 

Maximum Likelihood (ML) tree of 16SrDNA haplotypes of Monacha cantiana

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: eps

Explanation note: New 16SrDNA sequences of M. cantiana (Table 1) were compared with 16SrDNA sequences of M. cantiana s.l., M. parumcincta, M. pantanellii and M. cartusiana from GenBank (Suppl. material 2). Sequences were cut to 292 positions. GTR+G+I (Nei and Kumar 2000; Kumar et al. 2016) was the best nucleotide substitution model according to the Bayesian Information Criterion (BIC). Numbers next to branches indicate bootstrap support above 50% calculated by ML-MEGA7 (Kumar et al. 2016) on 1000 replicates (Felsenstein 1985). The tree was rooted with Trochulus hispidus sequences from GenBank (Suppl. material 2).

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (1.64 MB)
Supplementary material 9 

Maximum Likelihood (ML) tree of 16SrDNA haplotypes of Monacha cantiana

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: eps

Explanation note: New 16SrDNA sequences of M. cantiana (Table 1) were compared with 16SrDNA sequences of M. cantiana s.l. and M. cartusiana from GenBank (Suppl. material 2). Sequences were cut to 809 positions. T92+G (Tamura 1992; Kumar et al. 2016) was the best nucleotide substitution model according to the Bayesian Information Criterion (BIC). Numbers next to branches indicate bootstrap support above 50% calculated by ML-MEGA7 (Kumar et al. 2016) on 1000 replicates (Felsenstein 1985). The tree was rooted with Trochulus hispidus sequences from GenBank (Suppl. material 2).

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (556.99 kb)
Supplementary material 10 

Maximum Likelihood (ML) tree of ITS2 (flanked with 5.8S and 28SrDNA) haplotypes of Monacha cantiana

Joanna R. Pieńkowska, Giuseppe Manganelli, Małgorzata Proćków, Debora Barbato, Katarzyna Sosnowska, Folco Giusti, Andrzej Lesicki

Data type: eps

Explanation note: New ITS2 sequences of M. cantiana (Table 1) were compared with ITS2 sequences of M. cantiana s.l. and M. cartusiana from GenBank (Suppl. material 3). Sequences of specimens representing CAN-2 and CAN-3 lineages are shown. Sequences were cut to 775 positions. JC+G (Jukes and Cantor 1969; Kumar et al. 2016) was the best nucleotide substitution model according to the Bayesian Information Criterion (BIC). Numbers next to branches indicate bootstrap support above 50% calculated by ML-MEGA7 (Kumar et al. 2016) on 1000 replicates (Felsenstein 1985). The tree was rooted with Trochulus hispidus sequences from GenBank (Suppl. material 4).

This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited.
Download file (600.21 kb)
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