Research Article |
Corresponding author: Marko Prous ( mprous@ut.ee ) Academic editor: Stephan M. Blank
© 2019 Marko Prous, Andrew Liston, Katja Kramp, Henri Savina, Hege Vårdal, Andreas Taeger.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Prous M, Liston A, Kramp K, Savina H, Vårdal H, Taeger A (2019) The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae). ZooKeys 875: 63-127. https://doi.org/10.3897/zookeys.875.35748
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Keys to adults and larvae of the genera of West Palaearctic nematine sawflies are presented. Species of some of the smaller genera are keyed, and their taxonomy, distribution, and host plants reviewed, with a geographic focus on north-western Europe, particularly Sweden. Dinematus Lacourt, 2006 is a new junior subjective synonym of Pristiphora Latreille, 1810, resulting in the new combination Pristiphora krausi (Lacourt, 2006) for the type species of Dinematus. Hemichroa monticola Ermolenko, 1960 is a new junior subjective synonym of Hemichroa australis (Serville, 1823). Lectotypes are designated for Tenthredo opaca Fabricius, 1775, Mesoneura opaca var. nigerrima Enslin, 1914, Mesoneura opaca var. obscuriventris Enslin, 1914, Nematus hypogastricus Hartig, 1837, Nematus alnivorus Hartig, 1840, Leptopus rufipes Förster, 1854, Nematus protensus Förster, 1854, and Platycampus luridiventris var. pleuritica Enslin, 1915. A phylogenetic analysis based on four genes (mitochondrial COI and nuclear NaK, POL2, and TPI) supports the current generic classification.
Distribution, keys, lectotype designations, sawflies, Sweden, synonymy
In 2012 a project funded by the Swedish Taxonomy Initiative was launched, with the main objective of improving our knowledge of the taxonomy and distribution of nematine sawflies in Fennoscandia, and Sweden in particular (STI Nematinae Group 2013). As a first step, the generic classification of the world Nematinae was revised by
The Swedish Malaise Trap Project is abbreviated to SMTP. Abbreviations for the names of collections referred to in the text are as follows:
LSUK Linnean Society, London, United Kingdom
NFVG Niedersächsische Forstliche Versuchsanstalt, Göttingen, Germany
TUZ Natural History Museum, Tartu, Estonia
ZMHB Naturkundemuseum, Berlin, Germany
In the specimen data the dates are given as dd.mm.yyyy, and coordinates as positive (north or east) or negative (south or west) decimal degrees latitude and longitude.
Morphological terminology mostly follows
First drafts of the key to larvae were based mainly on
DNA was extracted and purified with an EZNA Tissue DNA Kit (Omega Bio-tek) according to the manufacturer’s protocol and stored at -20 °C for later use. Typically, one or two legs were used for DNA extraction, but for males the whole genital capsule was often additionally used to increase DNA yield and to free penis valves from muscles before photography. In some cases, the whole specimen was used for extraction. One mitochondrial and four nuclear regions were used in the phylogenetic analyses, although not all of these genes were obtained for all species. Primers used for amplification and sequencing are listed in Table
Primers used for PCR and sequencing (preferred primers in bold), with information provided on respective gene fragment, primer name, direction (forward, F or reverse, R), primer sequence, standard PCR annealing temperature, utilization (PCR/ sequencing), and reference. Primer annealing temperatures used for sequencing at Macrogen were usually 50 °C (47–50 °C).
Gene region | Primer name | F/R | Primer sequence 5'–3' | PCR annealing temperature (°C) | PCR/ Sequencing | Reference |
---|---|---|---|---|---|---|
COI | SymF1 | F | TTTCAACWAATCATAAARAYATTGG | 49 | PCR, seq | ( |
COI | SymF4 | F | AAATGATTATTYTCWACWAATCAYAA | 50 | PCR, seq | This study |
COI | sym-C1-J1718 | F | GGAGGATTTGGAAAYTGAYTAGTWCC | 49 | PCR, seq | ( |
COI | symC1-J1751 | F | GGAGCNCCTGATATAGCWTTYCC | 47 | seq | ( |
COI | SymR1 | R | TAAACTTCWGGRTGICCAAARAATC | 47 | PCR, seq | ( |
COI | SymR2 | R | TAAACTTCTGGRTGTCCAAARAATCA | 47 | PCR, seq | ( |
COI | A2590 | R | GCTCCTATTGATARWACATARTGRAAATG | 49 | PCR, seq | ( |
NaK | NaK_263F | F | CTYAGCCAYGCRAARGCRAARGA | 59 | PCR, seq | ( |
NaK | NaK_809F | F | GCWTTYTTCTCNACSAAYGCSGTNGARGG | 55 | PCR, seq | ( |
NaK | NaK_907Ri | R | TGRATRAARTGRTGRATYTCYTTIGC | 54 | PCR, seq | ( |
NaK | NaK_910R | R | TGRATRAARTGRTGRATYTCYTT | 50 | PCR, seq | ( |
NaK | NaK_1250Fi | F | ATGTGGTTYGAYAAYCARATYATIGA | 56 | PCR, seq | ( |
NaK | NaK_1250Fv2 | F | ATGTGGTTYGAYAAYCARATHATIGA | 56 | PCR, seq | This study |
NaK | NaKRev475 | R | TCGATRATYTGRTTRTCRAACCACAT | 56 | seq | ( |
NaK | NaK_1498R | R | ACYTGRTAYTTGTTNGTNGARTTRAA | 52 | PCR, seq | ( |
NaK | NaK_1918R | R | GATTTGGCAATNGCTTTGGCAGTDAT | 59 | PCR, seq | ( |
POL2 | POL2_104Fi | F | GYATGTCAGTYACNGATGGIGG | 59 | PCR, seq | ( |
POL2 | POL2_104Fv2 | F | CGNATGTCNGTNACNGAYGGIGG | 60 | PCR, seq | ( |
POL2 | POL2_574R | R | TCYTCRTTNACRTGYTTCCAYTCNGC | 59 | seq | ( |
POL2 | POL2_599F | F | GARTGGAARCAYGTVAAYGARGA | 54 | PCR, seq | ( |
POL2 | POL2_797F | F | ATGTAYGGNTCNGCNAARAAYCARGA | 58 | PCR, seq | ( |
POL2 | POL2_889R | R | TGRAAYTGYARCATYTTWATRTTYTC | 52 | PCR, seq | ( |
POL2 | POL2_928R | R | GGCATNCCNGGCATRTCRTTRTCNAC | 59 | PCR, seq | ( |
POL2 | POL2_1388F | F | CAYAARATGAGTATGATGGG | 51 | PCR, seq | ( |
POL2 | POL2_1459R | R | TTCATYTCRTCNCCRTCRAARTC | 52 | PCR, seq | ( |
POL2 | POL2_1706F | F | TGGGAYGGNAARATGCCNCARCC | 60 | PCR, seq | ( |
POL2 | POL2_1732R | R | GARAADATYTGYTTNCCNGTCCA | 55 | PCR, seq | This study |
POL2 | POL2_1759R | R | ATCATRTTNACRTTNCCNGGDATDAT | 55 | PCR, seq | ( |
POL2 | POL2_1777Ri | R | GTRCTGTGIGTYCKDATCATRTT | 55 | PCR, seq | ( |
POL2 | POL2 hym 3F | F | ACNCACAGYACNCAYCCN GAYGA |
56 | seq | ( |
POL2 | POL2_2423F | F | CATTTYATHAARGAYGAYTAYGG | 51 | seq | ( |
POL2 | POL2_2509R | R | TTNACRGCRGTATCRATNAGACCYTC | 60 | PCR, seq | ( |
POL2 | POL2_2569R | R | TGNACCATNACNGAYTCCATAGCYTTDAT | 60 | PCR, seq | This study |
POL2 | POL2_2725R | R | GGATCRAAYTTRAAYTTYTTYTC | 50 | PCR, seq | ( |
TPI | TPI_29Fi | F | GYAAATTYTTYGTTGGNGGIAA | 52 | PCR, seq | ( |
TPI | TPI385Fi | F | GTRATYGCNTGYATYGGIGARA | 52 | seq | ( |
TPI | TPI 275Ri | R | GCCCANACNGGYTCRTAIGC | 56 | seq | ( |
TPI | TPI706R | R | ACNATYTGTACRAARTCWGGYTT | 52 | PCR, seq | ( |
TRRAP | TRRAP_833F | F | AAYAARGARGTNTTYGTNGAYTTYATGGG | 58 | PCR, seq | This study |
TRRAP | TRRAP_1658F | F | CARTCNAARCARTTYCARCCNAARGARAC | 60 | seq | This study |
TRRAP | TRRAP_1702R | R | GGNGGNCCDATNGTRTARATRTC | 56 | seq | This study |
TRRAP | TRRAP_1831R | R | AADATYTCYTGRAANGTYTGNGGRTTCAT | 59 | seq | This study |
TRRAP | TRRAP_2648Fi | F | ATGATGATHGARCCNCARAARYTNGAITA | 58 | PCR, seq | This study |
TRRAP | TRRAP_3046R | R | TGNGCDATNGCNACCATNGTRTARTG | 60 | PCR, seq | This study |
TRRAP | TRRAP_3482Fi | F | GTNTCNAAYGGNGCHATHGAYATGGCIAA | 62 | seq | This study |
TRRAP | TRRAP_3685Ri | R | ACYTCYTTRTGNGGYTCCATNACYTCIGT | 62 | PCR, seq | This study |
TRRAP | TRRAP_4086F | F | CARGARGCNGCNTTYGARTGYATG | 59 | seq | This study |
TRRAP | TRRAP_4213Ri | R | CTRAANGTRCTNGGRAANARYTGIGT | 56 | PCR, seq | This study |
PCR reactions were carried out in a total volume of 15–35 μl containing 1.0–2.5 μl of extracted DNA, 1.5–3.5 μl (5.0–15 pmol) of primers and 7.5–17.5 μl of 2× Multiplex PCR Plus Master mix (QIAGEN). The PCR protocol consisted of an initial DNA polymerase (HotStar Taq) activation step at 95 °C for 5 min, followed by 38–40 cycles of 30 s at 95 °C, 90–120 s at 49–60 °C (depending on the primer set used), and 70–180 s (depending on the amplicon size) at 72 °C; the last cycle was followed by a final 30 min extension step at 68 °C. COI (primers symF4 [or symF1] + A2590), NaK (NaK_263F + 1918R) and TPI (TPI_29Fi + TPI706R) were in most cases amplified in one fragment, POL2 in one to three fragments, and TRRAP in two fragments (TRRAP_833F + 3046R and TRRAP_2648Fi + 4213Ri). Three μl of PCR product was visualised on a 1.4% agarose gel and the remaining product was then purified with FastAP and Exonuclease I (Thermo Scientific). 1.0–2.2 U of both enzymes were added to 12–32 μl of PCR solution and incubated for 15 min at 37 °C, followed by 15 min at 85 °C. 2–5 μl of purified PCR product per primer in a total volume of 10 μl (5–8 μl of sequencing primer at concentration 5 pmol/μl) were sent to Macrogen Europe (Netherlands) for sequencing. Both sense and antisense strands were sequenced using the primers listed in Table
Previous taxonomic publications have mostly recognised several tribes within the Nematinae. For example, Vikberg (1982) allocated the North European genera to six tribes, of which his Nematini was further divided into three sub-tribes. Subsequently, additional tribes were erected, often for species-poor lineages with more or less distinctive morphological and biological characters, e.g., Pristicampini (
Dineurini: Anoplonyx, Dineura, Hemichroa, Nematinus, Platycampus [and Neodineura?]
Nematini: Euura, Mesoneura, Nematus, Pristiphora [and Nescianeura?]
Pseudodineurini: Endophytus, Pseudodineura
Cladiini: Cladius
Hoplocampini: Hoplocampa
Stauronematini: Stauronematus
Maximum likelihood tree of Nematinae based on four genes (COI, NaK, POL2, TPI). Only specimens sequenced for all four genes were included. Short introns from POL2 and TPI were excluded. The best-fit model chosen according to Bayesian information criterion was GTR+R4. Numbers at branches show SH-aLRT support (%) / ultrafast bootstrap support (%) values. Support values for weakly supported branches (<90) are not shown. Letters “f” and “m” stand for “female” and “male”, and are not given for larvae. Numbers at the end of the tip labels refer to the length of the sequence and the number of ambiguous positions (e.g., heterozygosities). The number of ambiguous positions given for two males are due to variation in mitochondrial COI because of possible heteroplasmy. The tree was rooted as in
Genera and species represented in Fennoscandia are marked with an asterisk (*). Species numbers are for the West Palaearctic realm, followed by Fennoscandia.
1 |
a Fore wing normal, veins normally developed (Figs |
12 |
– |
aa Fore wing shortened, apex usually not reaching to the tip of the abdomen, veins often strongly aberrant (Figs |
* Euura abnormis (Holmgren, 1883) ♀ |
2(1) |
a Vein 2A of hind wing complete, cell A closed (Fig. |
3 |
– |
aa Vein 2A of hind wing incomplete, cell A open distally (Fig. |
12 |
3(2) |
a Vein 2r-rs absent (Fig. |
4 |
– |
aa Vein 2r-rs present (Fig. |
13 |
4(3) |
a Base of vein 2A+3A incomplete and straight, cell PA open distally (Fig. |
5 |
– |
aa Base of vein 2A+3A complete and curved up to 1A, cell PA closed (Fig. |
9 |
5(4,18) |
a Apex of vein C of fore wing swollen; at the point of origin of vein Rs+M from R, cell c usually only approx. as wide as R (Fig. |
* Pristiphora Latreille, 1810 |
– |
aa Apex of vein C of fore wing often less swollen; at the point of origin of vein Rs+M from R, cell c approx. twice as wide as R or wider (Fig. |
6 |
6(5) |
a Claws with basal lobe in addition to subapical tooth, subapical tooth erect and well separated from apical tooth, longer than apical tooth (Fig. |
* Stauronematus Benson, 1953 |
– |
aa Claws without basal lobe (Figs |
7 |
7(6) |
a Vein Sc before point of origin of vein M from R (Fig. |
8 |
– |
aa Vein Sc beyond point of origin of vein M from R (Fig. |
16 |
8(7) |
a In female, abdominal tergum 9 in lateral view more than 3 times as long as tergum 8 (Fig. |
* Nematinus Rohwer, 1911 |
– |
aa In female, abdominal tergum 9 in lateral view usually less than 2 times as long as tergum 8 (Fig. |
*Euura Newman, 1837 and (13 /10* species) *Nematus Panzer, 1801 |
Generic characters of Nematinae 2–3 Euura abnormis ♂ 4, 5 Euura abnormis ♀ (drawings after
Generic characters of Nematinae 14 Pristiphora dedeara clypeus 15 Nematus septentrionalis clypeus 16 Stauronematus platycerus claw (arrow: basal lobe) 17 Euura pumilio claw 18 E. clitellata claw 19 Nematus lucidus claw 20 E. ribesii claw 21 Pristiphora pallidiventris valvula 3 (arrow: emargination) 22 Euura reticulata valvula 3 (arrow: not emarginate) 23 Pristiphora subopaca tergum 8 24 Euura ribesii 25 Pristiphora astragali lancet (arrow: campaniform sensilla on tangium) 26 Euura bertilpoppii lancet (arrow: no campaniform sensilla on tangium) 27 Pristiphora pseudodecipiens penis valve (arrow: valvispina) 28 Euura jugicola penis valve (arrow: valvispina).
Generic characters of Nematinae 29 Nematinus fuscipennis fore wing 30 Dineura virididorsata fore wing 31 Nematinus fuscipennis abdomen tip 32 Euura vesicator abdomen tip 33 Nematinus fuscipennis penis valve 34 Nematinus bilineatus penis valve 35 Euura vesicator penis valve 36 Nematinus fuscipennis left mandible 37 Dineura virididorsata left mandible 38 Pristiphora krausi left mandible 39 Nematus septentrionalis metatarsus 40 Euura caeruleocarpus metatarsus.
Preliminarily, the European Nematus species may be separated morphologically from Euura as follows:
A | (a) 1st metatarsomere 2.0–3.0 times as wide as width of 2nd metatarsomere (Fig. |
* Nematus septentrionalis group |
– | (b) 1st metatarsomere only slightly wider than width of 2nd metatarsomere (Fig. |
B |
B(A) | (a) Pterostigma dark brown to black (Figs |
C |
– | (aa)–(cc) Characters not in the combination of (a)–(c): (aa) Pterostigma often mainly pale; (bb) Antennae frequently (especially ventrally) pale; (cc) Pronotal angles and / or tegulae may be black | F |
C(B) | (a) Mesepisternum densely sculptured, ± matt; (b) Terga (1–)2–3(–6), femora, tibiae, and tarsi of fore and middle legs reddish (Figs |
* Nematus lucidus (Panzer, 1801) |
– | (aa) Mesepisternum shiny, at most weakly sculptured; (bb) Coloration different (Figs |
D |
D(C) | (a) Abdomen black (Fig. |
* Nematus wahlbergi group |
– | (aa) Abdomen usually at least partly yellowish or reddish (Fig. |
E |
E(D) | (a) Valvula 3 in dorsal view hardly tapering towards apex, and visible parts approx. as long as broad (Fig. |
* Nematus umbratus Thomson, 1871 |
– | (aa) Valvula 3 in dorsal view tapering towards apex, and visible parts often longer than broad (Fig. |
Euura part. (*melanocephalus, *bohemani, *ribesii species group, *salicis) |
F(B) | (a) Pronotal angles black (Figs |
* Nematus princeps Zaddach, 1876 |
– | (aa) Pronotal angles often pale marked; (bb) Body length frequently less than 8 mm, usually not torpedo-shaped; (cc) Abdomen coloured differently (dd) Penis valve different | Euura part |
9(4) |
a Vein 2m-cu running into cell 2Rs (Fig. |
10 |
– |
aa Vein 2m-cu running into cell 1Rs (Fig. |
11 |
10(9) |
a Claw usually with large or small inner tooth; exceptionally, simple; b Scape and pedicellus together much shorter than the first flagellomere, sometimes in male the latter with basal projection (Fig. |
* Cladius Illiger, 1807 |
– |
aa Claw simple; bb Scape and pedicellus together approx. as long as the first flagellomere, the latter without projection (Fig. |
[Armenocampus Zinovjev, 2000] |
11(9) |
a Claw simple, without subapical tooth; b Apex of vein C of fore wing swollen; at the point of origin of vein Rs+M from R, cell c usually only approx. as wide as R (cf. Fig. |
* Anoplonyx Marlatt, 1896 |
– |
aa Claw with subapical tooth; bb Apex of vein C of fore wing less swollen; at the point of origin of vein Rs+M from R, cell c approx. twice as wide as R or wider (cf. Fig. |
* Platycampus Schiödte, 1839 |
12(2) |
a Base of vein 2A+3A incomplete and straight (Fig. |
* Pseudodineura Konow, 1885 |
– |
aa Base of vein 2A+3A more or less complete and curved up to 1A (Fig. |
*Endophytus Hering, 1934 |
13(3) |
a Base of vein 2A+3A complete and curved up to 1A (Fig. |
14 |
– |
aa Base of vein 2A+3A incomplete and straight (Fig. |
15 |
14(13) |
a Vein 2m-cu running into cell 2Rs (Fig. |
*Hoplocampa Hartig, 1837 |
– |
aa Vein 2m-cu running into cell 1Rs (Fig. |
*Hemichroa Stephens, 1835 |
15(13) |
a Vein Sc before point of origin of vein M from R (cf. Fig. |
17 |
– |
aa Vein Sc beyond point of origin of vein M from R (Fig. |
*Dineura Dahlbom, 1835 |
16(7) |
a Left mandible in lateral view markedly constricted near middle (cf. Fig. |
Nescianeura Lacourt, 2006 |
– |
aa Left mandible in lateral view tapered regularly towards apex (Figs |
*Dineura Dahlbom, 1835 |
17(15) |
a Clypeus long (Fig. |
Neodineura Taeger, 1989 |
– |
aa Clypeus short (Fig. |
18 |
18(17) | a Antenna rather short, ca. 1.5 times as long as width of head; b Claw with large inner tooth (2 / 1* species) | *Mesoneura Hartig, 1837 |
– |
aa Antenna longer, ca. 2–3 times as long as width of head; bb Claw simple or with small inner tooth (few specimens of Pristiphora; see key in |
5 |
Generic characters of Nematinae 41–42 Nematus lucidus ♀ 43 N. wahlbergi ♀ 44 N. wahlbergi valvula 3 45 N. umbratus valvula 3 46 Euura melanocephalus valvula 3 47 E. bohemani valvula 3 48 E. ribesii valvula 3 49 E. salicis valvula 3 50 Nematus wahlbergi penis valve 51 N. umbratus penis valve 52 Euura salicis penis valve 53 E. ribesii penis valve 54 E. bohemani penis valve 55 Nematus princeps penis valve 56 Nematus umbratus ♀ 57–58 Nematus princeps ♀. Scale bars: 2 mm (41–43, 56), 5 mm (57–58)
Generic characters of Nematinae 59 Cladius compressicornis fore wing 60 Platycampus luridiventris fore wing 61 Cladius ulmi ♂ flagellomere 1 62 Armenocampus necopinus antenna (after
Numbers of setae on dorsal annulets are for only one side of the body, as in
1 |
a Prolegs present on abdominal segments 2–8 and 10 (Fig. |
2 |
– |
aa Prolegs present on abdominal segments 2–7 and 10 (Fig. |
3 |
2(1) | a Prolegs normally developed on segment 8; b Antenna with 1–5 antennomeres; c Abdominal segment 3 with 2–6 annulets | [not Nematinae] |
– |
aa Prolegs on segment 8 reduced to protuberances much smaller than prolegs on segment 7 (Fig. |
Mesoneura opaca |
3(1) |
a Leaf-miners of Ranunculaceae; b Prosternum with median dark fleck and pair of lateral flecks (Fig. |
Pseudodineura [3 species] and Endophytus anemones [1 species] |
– | aa Exophytic on leaves of many plant families, or in galls on Salix, fruits of Ribes or Rosaceae, or catkins of Salix; bb Prosternum without dark markings, or only with a median fleck; dorsum of thorax often with markings | 4 |
4(3) | a Abdominal segment 3 with less than 6 dorsal annulets | 5 |
– | aa Abdominal segment 3 with 6 dorsal annulets | 24 |
5(4) | a Abdominal segment 3 with 3–4 dorsal annulets | 6 |
– | aa Abdominal segment 3 with 5 dorsal annulets | 15 |
6(5) |
a Body flat, woodlouse-shaped (Figs |
Platycampus [1 species] |
– | aa Body at most slightly flattened; bb Upper head normal | 7 |
7(6) |
a Supra-anal lobe with pseudocerci (cf. Figs |
Euura
[part: ca. 50 species of Salix gall-makers of former Pontania, Phyllocolpa, Tubpontania, and also some exophytic species; overview of galls and larvae of gall-makers in |
– | aa Supra-anal lobe without pseudocerci | 8 |
8(7) |
a Setae on dorsal body annulets arising singly and not from warts (Fig. |
9 |
– |
aa Setae on dorsal body annulets arising from warts, singly or partly in groups (Figs |
Cladius , 10 |
9(8) |
a Dorsal body annulets with some very long setae: as long as length of head (Fig. |
Pristiphora dasiphorae and malaisei [former Pristicampus] |
– | aa Dorsal body annulets with short setae: longest much shorter than length of head; bb Abdomen segments with 4 dorsal annulets |
Euura
[part: approx. 16 Salix gall-makers of atra group; overview of galls and larvae in |
10(8) | a Setae on dorsal annulets 2 and 3 of abdominal segment 3 arise in groups from large, pale warts | 11 |
– |
aa Setae on dorsal annulets 2 and 3 of abdominal segment 3 arise singly on small warts which are close to each other (Fig. |
Cladius brullei , C. compressicornis |
11(10) |
a Annulet 1 of abdominal segment 3 with 5–8 setae of which 3–4 arise together from a single wart; b Head without black markings (Fig. |
Cladius pectinicornis |
– |
aa Annulet 1 of abdominal segment 3 with 2–5 setae each arising singly from a small wart; bb Head at least partly black (Fig. |
12 |
12(11) |
a Head black (Fig. |
13 |
– | aa Head green to reddish-yellow with small black flecks; bb Surpedal lobe without black markings; cc Anal lobe without black fleck [Ulmus] | 14 |
13(12) | a Surpedal lobe with small black fleck; b Body of younger instars yellow-green, apart from yellow-orange caudal and distal parts [mature: entirely yellow-orange] [Populus, rarely Salix] | Cladius grandis |
– | aa Surpedal lobe without small black fleck; bb Body of younger instars whitish, apart from yellow-orange caudal and distal parts [Salix spp.] | Cladius aeneus |
14(12) | a A black fleck only medially on upper head | Cladius rufipes |
– | aa A black fleck medially on upper head, a pair of black flecks around stemmata, and a black frontal fleck | Cladius ulmi |
15(5) |
a Tips of setae on dorsal annulets modified: spatulate or slightly cleft [Betula, Prunus padus, Crataegus, or Sorbus: known larvae keyed by |
Dineura [4 species] |
– | aa Tips of setae not modified | 16 |
16(15) |
a In female catkins of Salix species; b Antenna completely flat, comprising several incompletely formed antennomeres (Fig. |
Euura [part: ca. 6 species of former Pontopristia] |
– | aa Exophytic on leaves, or endophytic in fruits of Rosaceae; bb Antenna completely flat, or at least apical antennomere clearly conic | 17 |
17(16) |
a Body somewhat dorso-ventrally flattened (Figs |
[Nematinus, 6 species], 18 |
– |
aa Body cylindrical (cf. Figs |
22 |
18(17) | a Dorsum of body sooty-black; with rows of white warts [Betula] | Nematinus caledonicus |
– | aa Dorsum of body green; with or without white warts | 19 |
19(18) |
a Dorsum of body without white warts (Fig. |
Nematinus acuminatus |
– |
aa Dorsum of body with white warts (Figs |
20 |
20(19) |
a Top of head with pair of dark brown flecks, one each side of coronal suture (Figs |
21 |
– | aa Top of head without dark brown flecks [Alnus spp.] | Nematinus fuscipennis |
21(20) |
a Dark brown around orbits, particularly towards temples and rear of head (Fig. |
Nematinus luteus |
– |
aa Not dark brown around orbits (Fig. |
Nematinus steini |
22(17) |
a Dorsum of body with extensive dark pattern of brown patches, or grey longitudinal stripes (Figs |
Anoplonyx |
– | aa Dorsum of body at most with small, separate dark markings on abdomen; bb Dorsal annulets [2 and 3] or [1–4] of abdominal segment 3 with setae | 23 |
23(22) |
a Dorsal annulets [2 and 3] of abdominal segment 3 with setae; b Body without colour pattern except for dark dorsum of abdomen apex (Fig. |
Hoplocampa [9 species] |
– | aa Dorsal annulets [1–4] of abdominal segment 3 with setae; bb Body usually with different colour pattern [Exophytic on leaves, mostly Salix] | Euura [part: some former Amauronematus] |
24(4) | a Supra-anal lobe without pseudocerci or protuberances | 25 |
– | aa Supra-anal lobe with pseudocerci or protuberances | 33 |
25(24) | a Stipes of maxilla with 0–1 setae | 26 |
– | aa Stipes of maxilla with 2–3 setae | 29 |
26(25) |
a 3 dorsal annulets [1, 2 and 4] of abdominal segment 3 with setae (Fig. |
27 |
– | aa 2 dorsal annulets [2 and 4] of abdominal segment 3 with setae | 28 |
27(26) |
a Setae on surpedal and substigmal lobes approx. twice as long as those on body dorsum; b All antennomeres incomplete; antenna completely flat [Populus, sometimes Salix: leaf around larva usually surrounded by pillars of dried white secretion: Fig. |
Stauronematus platycerus |
– |
aa Setae on surpedal and substigmal lobes not longer than setae on body dorsum (Fig. |
Pristiphora malaisei [see taxon commentary under that name, below] |
28(26) | a Stipes without setae. If with one seta, then supra-anal lobe in the middle with conspicuous protuberance [coniferous trees, or diverse dicot plants] | Pristiphora [larger part: ca. 90 species] |
– | aa Stipes with one seta. Supra-anal lobe dorsally with brown-marked depressions [grasses and sedges] | Euura clitellata group |
29(25) | a Two dorsal annulets [2 and 4] of abdominal segment 3 with setae | Euura [part: E. spiraeae, some former Pachynematus] |
– | aa More than 2 dorsal annulets of abdominal segment 3 with setae | 30 |
30(29) | a Four dorsal annulets [1–4] of abdominal segment 3 with setae | Euura [part: some former Amauronematus] |
– | aa Three dorsal annulets [1, 2 and 4] of abdominal segment 3 with setae | 31 |
31(30) | a Annulet 1 of abdominal segment 3 with only one seta, annulet 2 without warts bearing several setae | Euura [part: some former Pachynematus] |
– | aa Annulet 1 of abdominal segment 3 with two setae, if not, then annulet 2 with 2 warts each bearing several setae | 32 |
32(31) | a Body somewhat dorso-ventrally flattened; b Annulet 2 of abdominal segment 3 with 4 setae [Salix] | Euura flavescens |
– | aa Body cylindrical; bb Annulet 2 of abdominal segment 3 with more than 4 setae | Euura [part: some former Amauronematus] |
33(24) | a Caudal margin of supra-anal lobe with 10–12 blunt-conic protuberances; b Antenna with 5 antennomeres | 34 |
– | aa Supra-anal lobe with 2 pseudocerci, and without blunt-conic protuberances; bb Antenna with 4 antennomeres | 35 |
34(33) |
a Each body side with three longitudinal black stripes (Fig. |
Hemichroa crocea |
– |
aa Body without black stripes (Fig. |
Hemichroa australis |
35(33) | a Three dorsal annulets [1, 2 and 4] of abdominal segment 3 with setae | 36 |
– | aa Two dorsal annulets [2 and 4] of abdominal segment 3 with setae | 40 |
36(35) | a Dorsal annulet 1 of abdominal segment 3 with 1 seta; annulet 2 with 6–7 setae [Surpedal lobe with 8–9 setae; Picea] | Euura insignis |
– | aa Dorsal annulet 1 of abdominal segment 3 with 2–6 setae | 37 |
37(36) | a All antennomeres incomplete and flat [Dorsal annulet 1 of abdominal segment 3 with 2 large and 1 small setae; setae arise from dark flecks] | Euura [part: some former Amauronematus] |
– | aa At least antennomere 4 button-, peg- or cone-shaped | 38 |
38(37) |
a Exophytic on Lonicera, rarely on Symphoricarpos; b Pseudocerci in dorsal view very close to each other, near median line of abdomen (Fig. |
39 |
– |
aa Exophytic on many plant genera, but not Lonicera or Symphoricarpos; bb Pseudocerci in dorsal view much further apart, near lateral edges of tergum (Fig. |
Euura [part: former Pteronidea] |
39(38) |
a Whole upper head darkened (Fig. |
Nematus lonicerae |
– |
aa Head pale with rather narrow median stripe (Fig. |
Nematus wahlbergi |
40(35) | a Substigmal lobe with at least 8 setae | 41 |
– | aa Substigmal lobe with no more than 6 setae | 42 |
41(40) |
a Pseudocerci apically blunt, and widening towards apex (Fig. |
Nematus lucidus |
– | aa Pseudocerci apically pointed, and cone-shaped; distance between them 3–4 × the length of one pseudocercus [Salix, Rumex, rarely Betula] | Euura vicina |
42(40) |
a Abdominal segments ventrally between the prolegs with large black flecks, or body except for more or less pale 1st and last 3 segments nearly completely brown-black (Fig. |
43 [Nematus part: former Craesus] |
– |
aa Abdominal segments without large black flecks ventrally, body markings different [if with black markings, these as more complicated pattern of small flecks: cf. Fig. |
46 |
43(42) |
a Either nearly whole dorsum black (Fig. |
44 |
– |
aa Dorsum largely green, more or less with black flecks on sides of body, but individual black flecks much smaller than half the length of an abdomen segment (Figs |
45 |
44(43) |
a At least dorsum of body broadly black, except at most for prothorax and tip of abdomen (Fig. |
Nematus latipes |
– |
aa Dorsal midline of body entirely without black markings (Fig. |
Nematus septentrionalis |
45(43) | a Abdominal prolegs yellow; b Coxae entirely pale [Carpinus betulus, Corylus avellana] | Nematus brischkei |
– |
aa Abdominal prolegs green (Fig. |
Nematus alniastri |
46(42) | a Pseudocerci visible in dorsal view; subparallel or diverging, and more or less symmetrical [Various plant genera] | Euura [part: former Pteronidea] |
– |
aa Pseudocerci not visible in dorsal view; directed inwards, and curved [Betula. Body entirely green, except for dark marks on coxae, and small flecks at bases of the more ventral setae: Fig. |
Nematus princeps |
Synonymy of genus-group names was given by
No reliable key or species treatments are available to date.
This genus was erected for a single species, Armenocampus necopinus (Zhelochovtsev, 1941), originally described as Caulocampus necopinus, known only from the small type series of both sexes collected in Armenia. Nothing is known about its biology.
No reliable key or species treatments are available to date.
See key and species treatments in
See species treatment in
Pontania Costa, 1852
Amauronematus Konow, 1890
Pachynematus Konow, 1890
Pteronidea Rohwer, 1911
Pontopristia Malaise, 1921 (
Brachycoluma Strand, 1929
Decanematus Malaise, 1931 (
Pikonema Ross, 1937
Phyllocolpa Benson, 1960 (
Eitelius Kontuniemi, 1966
Gemmura E.L.Smith, 1968
Eupontania Zinovjev, 1985
Larinematus Zhelochovtsev, 1988
Polynematus Zhelochovtsev, 1988
Bacconematus Zhelochovtsev, 1988
Alpinematus Lacourt, 1996
Epicenematus Lacourt, 1998
Kontuniemiana Lacourt, 1998
Lindqvistia Lacourt, 1998
Tubpontania Vikberg, 2010
1 | a Female | 2 |
– | aa Male | 3 |
2 |
a Abdomen yellow or orange except for black valvula 3 and more or less tergum 1 (Figs |
*Hemichroa crocea (Geoffroy, 1785)♀ |
– |
aa Abdomen black except for more or less red terga 8, 9, 10 and hypopygial area (Figs |
*Hemichroa australis (Serville, 1823)♀ |
3 |
a Penis valve: upper edge of pseudoceps convex, distal part more evenly tapering; distal projections small (Fig. |
*Hemichroa crocea (Geoffroy, 1785) ♂ |
– |
aa Penis valve: upper edge of pseudoceps concave, distal part more abruptly tapering; distal projections larger (Figs |
*Hemichroa australis (Serville, 1823) ♂ |
Tenthredo alni
Linné, 1767: 925. Lectotype ♀, designated by
Tenthredo luctuosa
Hill, 1773: 5–6, pl. 1. Syntype(s) ♀, lost. Type locality: Uxbridge (United Kingdom). Treated as nomen oblitum and synonymised with australis by
Tenthredo australis
Serville, 1823: 16. Syntype(s) ♀, lost. Type locality: Midi (France). Nomen protectum, as stated by
Tenthredo australis Lepeletier, 1823:71. Syntype(s) ♀, lost. Type locality: Midi (France). Primary homonym of Tenthredo australis Serville, 1823.
Hemichroa monticola Ermolenko, 1960: 208–210. Holotype ♀ (Schmalhausen Institute, Kiev: not examined) and 4 female paratypes (one examined). Type locality: Ukraine, Lvovskoj oblasti, Slavekogo rajona, Tuhovalskom perevale. Syn. nov.
– lower surface of antenna noticeably paler than the upper [uniformly dark]
– medial emargination of clypeus deep, usually exceeding half of its length [reaching half of its length]
– intercostal and lanceolate cells of the fore wing and main half of the hind wing are clearly darkened [wings nearly completely hyaline]
– the 2nd anal cell of the posterior wing is almost equal to the length of the median cells [2nd anal cell of the posterior wing noticeably shorter than median one]
– 9th tergum predominantly dark [9th tergum red]
– cerci yellow [cerci basally yellow, apically fuscous]
– valvula 3 of ovipositor on lower margin noticeably convex in lateral view [only slightly convex]
– teeth of the proximal half of the ovipositor have two or more smaller additional denticles at the base [these teeth with only one small additional tooth]
Only a single paratype of monticola was available for examination, but we also examined four females (
Previously published descriptions of the male of Hemichroa australis, and the colour characters which are claimed to distinguish it from that of crocea, are partly contradictory, and may not be reliable.
Body length: female 6.5–8.5 mm, male 6.0–6.5 mm. Wing colour highly variable in both sexes, from nearly entirely hyaline, to entire hind wing and basal fore wing up to about pterostigma conspicuously darkened. Female (Figs
Our characterisation of the male of australis is based primarily on three specimens from Germany (BC
See key, and notes on male (above, and under crocea, below). Compared with crocea (Fig.
Host plants (in Europe): Betula pendula, pubescens (
Trans-palaearctic from the British Isles, through north and central Europe (
Published records: Skåne (
Czech Republic: 1♀ (
Tenthredo crocea Geoffroy in Fourcroy, 1785: 364. Syntype(s) ♀, lost. Type locality: Paris (France).
Tenthredo rufa Panzer, 1799: 72:2. Syntype(s) ♀, lost. Type locality: Germany. Primary homonym of Tenthredo rufa Retzius, 1783.
Hemichroa stigma
Stephens, 1835: 56. Syntype(s) ♀, most likely lost. Type locality: Ripley (United Kingdom). Listed in synonymy with Hemichroa rufa (Panzer) by
Leptocercus nigriceps
Thomson, 1871: 78. Holotype ♀, not examined, in
Dineura (Leptocera) unicolor
Rudow, 1872: 218. Syntype(s) ♀, most likely lost. Type locality: not given [Germany]. Synonymy by
Dineura americana
Provancher, 1882: 292–293. Holotype ♀, not examined,
Nematus ardens
Zaddach in Brischke, 1883a: 133–134. Holotype ♀, lost. Type locality: Carolath (Siedlisko, Poland). Listed in synonymy by
Dineura pallida
Ashmead, 1890: 15. Holotype ♀, not examined, in
Hemichroa dyari
Rohwer, 1918: 170–171. Holotype ♀, not examined, in
Hemichroa (Hemichroa) orientalis
Rohwer, 1921: 108–109. Holotype ♀, not examined, in
Hemichroa (Hemichroa) washingtonia
Rohwer & Middleton, 1932: 97–98. Holotype ♀, not examined, in
Body length: female 5.5–8.5 mm, male 5.5 mm (only one examined). Female (Figs
We have only examined one old male specimen (DEI-GISHym31838), without genetic data, which we think belongs to crocea, because of the similarity of its penis valve to that illustrated by
See key and notes on australis, above.
Host plants: Alnus glutinosa, incana, viridis, Betula pendula, and sometimes Corylus avellana (
Found widely in the Holarctic, from the British Isles, through central and northern Europe (
Published records: Skåne (
Canada: Quebec: 1♀ (DEI-GISHym15340), Gatineau Park 1.8km N Eardley, Juniperus virginiana stand, 60–80 m, 45.56667N, 76.09139W, 31.08.–07.09.2012, leg. CNC Hymenoptera Team (
See key and species treatments in
Only two species are known from the West Palaearctic (
1 | a Females | 2 |
– | aa Males | 3 |
2(1) |
a Upper side of abdomen mainly black; at least with a continuous black dorsal vitta (Fig. |
*Mesoneura opaca ♀ |
– |
aa Upper side of abdomen mainly yellow apart from black 1st tergum and some black lateral spots (Fig. |
*Mesoneura lanigera ♀ |
3(1) |
a Abdominal terga 5–8 with a deep, sharply delimited medial depression edged with a row of long setae (Fig. |
Mesoneura opaca ♂ |
– |
aa Abdominal terga 5–8 with at most a shallow, ill-defined medial depression, without row of modified setae along edge (Fig. |
Mesoneura lanigera ♂ |
Tenthredo opaca
Fabricius, 1775: 323. Syntype(s) ♀, Suecia, lectotype ♀ here designated (
Tenthredo (Allantus) verna
Klug, 1816: 55–56. Syntypes ♀, Berlin, in ZMHB. Type locality: Berlin (Germany). Synonymy with Tenthredo opaca Fabricius, 1775 by
Tenthredo punctigera
Serville, 1823: 103. Lectotype ♀, designated by
Tenthredo punctigera
Lepeletier, 1823: 110. Lectotype ♀, designated by
Selandria biloba
Stephens, 1835: 54. Syntype(s) ♀, not examined, in
Dineura (Mesoneura) pallipes
Hartig, 1837: 229. Syntype(s) ♀, most likely lost. Type locality: Harz (Germany). Synonymy by
Dineura dorsalis
Förster, 1844: 263. Holotype ♀, most likely lost. Type locality: Aachen (Germany). Synonymy by
Mesoneura opaca var. nigerrima
Enslin, 1914: 271. Syntype(s) ♀, no data, lectotype ♀ here designated (GBIF-GISHym3158, images: https://doi.org/10.6084/m9.figshare.4775329), in
Mesoneura opaca var. lucida Enslin, 1914: 271. Syntype(s) ♀, no data, most likely lost. Type locality: Europe.
Mesoneura opaca var. obscuriventris
Enslin, 1914: 271. Syntype(s) ♀, no data, lectotype ♀ here designated (GBIF-GISHym3160, images: https://doi.org/10.6084/m9.figshare.4775341), in
Body length: female 5.5–9.0 mm, male 6.5–8.0 mm. Female (Fig.
In the West Palaearctic, only Mesoneura lanigera Benson, 1954 (south-east Europe, Transcaucasus and Cyprus) could be mistaken for opaca: see key.
Host plants: Quercus species, including robur (
Widespread in central and southern Europe, from the British Isles, north to Finland (
Based on published records: Skåne, Småland (
Bulgaria: 10♀ (
No reliable key or species treatments are available to date.
No reliable key or species treatments are available to date.
Currently, fewer than 20 European taxa are considered to be Nematus species: Nematus lucidus
Neodineura Taeger, 1989: 150–151. Type species: Tenthredo (Allantus) arquata Klug, 1816 [= Neodineura arquata], by original designation and the only known species.
Body stocky, similar to Mesoneura. Fore wing radial cell divided. Radial cross vein (2r-rs) arises near the apex of stigma and meets the cell 1Rs2; basalis (M) and 1st medial cross vein (1m-cu) strongly converging; M clearly bent only basally; intercostal crossvein (Sc) lying before the junction of M with the Subcosta (Sc+R+Rs); 1st and 2nd medial cross vein (1m-cu and 2m-cu) join the 2nd cubital cell; submedial crossvein (cu-a) meeting medius (Cul) and brachius (lA) almost perpendicularly; anal cell stalked; humeral vein (3A) straight. Hind wing with 2 middle cells, anal cell with long stalk. Inner eye margins slightly converging downwards; distance between the lower eye corners little longer than the maximum eye diameter; clypeus long, shallowly emarginate, in the middle approx. as long as the diameter of a torulus or ca. 1.5 times as long as the distance between the antennal sockets; labrum weakly emarginate on anterior edge; malar space just under half as long as the anterior ocellus; mandibles almost symmetrical, with subapical tooth, in lateral view tapered approximately evenly to the tip. Antenna approx. twice as long as width of head; scape and pedicel distinctly wider than long. Prepectus separated from mesepisternum by a fine line; inner spur of the fore tibia apically divided. Claws bifid, without basal thickening; inner and outer tooth approx. the same thickness, inner tooth slightly shorter.
Tenthredo (Allantus) arquata
Klug, 1816: 51. Female (existence of syntypes must be assumed). Type locality: Deutschland. Type specimens lost (
This is based on a translation of
Female: upper half of mesepisternum pale, lower half black. Pronotum, mesepimeron, and metapleura entirely pale. Propleuron edged with black. Head behind eyes subparallel. Antennomere 8 approx. three times as long as wide. Lancet: Fig.
Male: mesepisternum completely black. Pronotum ventrally black. Mesepimeron and metapleura partly pale. Propleuron completely black. Anterior of abdominal tergum 2 also black. Fore wing length 6.5 mm; antennomere 8 3.5 times as long as wide; head behind the eyes clearly narrowed; tergite 8 without special structures; subgenital plate apically rounded. Penis valve: Fig.
In the West Palaearctic, Mesoneura opaca and lanigera are superficially similar in habitus to Neodineura arquata.
Unknown.
Only known from Germany, Switzerland (
No records.
(to the best of our knowledge, the following are the only known extant collection specimens of this species):
Czech Republic [not examined: data from
One species, Nescianeura noblecourti Lacourt, 2006, only known from three specimens collected in north-east France and south-west Germany. Females and males, which are similarly coloured, are easily recognised by their distinctive colour pattern (Figs
France: Holotype ♀ (DEI-GISHym20818), Lorraine, Saint-Maurice-sur-Moselle, 26.05.1995, leg. Bernard (
Two species have been considered to be represented in the West Palaearctic fauna (
Tenthredo alnicola
Bechstein & Scharfenberg, 1805: 867. Syntypes, larvae, lost. Type locality: Germany. Synonymy with Leptopus luridiventris by
Tenthredo luridiventris
Fallén, 1808: 115–116. Syntype(s) ♀, not examined (revised by
Nematus hypogastricus
Hartig, 1837: 184. Syntypes ♀, Deutschland, lectotype ♀ here designated, (GBIF-GISHym3464, images: https://doi.org/10.6084/m9.figshare.4788550), in
Nematus alnivorus
Hartig, 1840: 27. Syntypes ♀, Norddeutschland, lectotype ♀ here designated (GBIF-GISHym4675) in NFVG. Type locality: Harz, Roßtrappe (Germany). Paralectotype 1♀, in
Nematus rufipes
Tischbein, 1846: 77. Syntypes ♂♀(?), lost. Type locality: Eutin (Germany). Listed in synonymy with Leptopus luridiventris by
Leptopus rufipes
Förster, 1854: 276–277. Syntypes ♂, Aachen, lectotype ♂ here designated, (GBIF-GISHym3468, images: https://doi.org/10.6084/m9.figshare.4788580), in
Nematus protensus
Förster, 1854: 322–323. Syntype(s) ♀, Aachen, lectotype ♀ here designated, (GBIF-GISHym3467, images: https://doi.org/10.6084/m9.figshare.4788595), in
Camponiscus Healaei [sic!] Newman, 1869: 215–217. Syntypes ♂♀, larvae, lost. Type locality: United Kingdom. Synonymy with Tenthredo luridiventris by
Nematus Tischbeini [sic!] André, 1880: 120. Replacement name for Nematus rufipes Tischbein, 1846.
Nematus
Fennicus [sic!] André, 1880: 133. Syntype(s) ♀, deposition unknown. Type locality: Finland. Synonymy by
Nematus alnicola
Zaddach in Brischke, 1883b: 188–189. Holotype ♀, “wohl im westlichen Deutschland”, lost. Type locality: Germany(?). Synonymy with Leptopus luridiventris by
Nematus cellularis
Brischke, 1884: 138–139. Syntypes ♂♀, Danzig, lost. Type locality: Gdansk (Poland). Primary homonym of Nematus cellularis Dahlbom, 1836. Synonymy with Leptocercus luridiventris by
Platycampus luridiventris var. pleuritica
Enslin, 1915: 322. Syntype(s) ♀, no data, lectotype ♀ here designated (GBIF-GISHym3466, images: https://doi.org/10.6084/m9.figshare.4788727) in
W. Heitland, H. Pschorn-Walcher and J. Herbst studied European populations of P. luridiventris feeding on Alnus glutinosa, incana, and viridis. They found the populations on each host to be genetically segregated (
Playcampus luridiventris, lancets, variability and wear of teeth 128 DEI-GISHym21133, Sweden, Torne Lappmark 129 DEI-GISHym21134, Sweden, Torne Lappmark 130 DEI-GISHym31937, Sweden, Ångermanland 131 DEI-GISHym31938, Sweden, Småland 132 DEI-GISHym11313, Germany, Mecklenburg-Vorpommern 133 DEI-GISHym31936, Germany, Mecklenburg-Vorpommern, teeth worn.
Body length: female 5.0–7.0 mm, male 4.5–6.0 mm. Female: head black except for palps, and more or less labrum, underside of antennal flagellum, and sometimes more or less scape and pedicel. Thorax black, except for yellow tegula and more or less posteriodorsal edges of pronotum. Sometimes lateral edges of median mesoscutal lobe, and upper mesepisternum pale. Legs pale (orange), with dark metatarsus and apex of metatibia, and more or less dark bases of coxae. Wing venation mostly brown, with centre of fore wing stigma paler. Cerci pale; rest of abdomen from completely black except for obscurely brown area of hypopygium, to all sterna bright yellow, sometimes also with yellow on downturned lateral edges of terga. One reared female from Abisko has dorsal parts of terga 2–4 pale. Variability in the shape of the teeth of the lancet is considerable (Figs
If the nearly complete loop formed by the curved up base of fore wing vein 2A+3A in Platycampus is overlooked, then it might be mistaken for Stauronematus platycerus, which is similarly coloured and also has bifid claws (but with an additional basal lobe not found in Platycampus), or perhaps a Pristiphora species.
Host plants: Alnus glutinosa, incana, and viridis (
Widespread in Europe, from the British Isles to the Balkans, and north to Norway and Finland (
Published records:
Estonia: 3♀, 1♂ (
Pristiphora Latreille, 1810: 294, 435. Type species: Pteronus testaceus Jurine, 1807 [= Pristiphora testacea (Jurine, 1807], by original designation.
Dinematus Lacourt, 2006: 237–238. Type species: Dinematus krausi Lacourt, 2006, by original designation. Syn. nov.
As already suggested by
Dinematus krausi
Lacourt, 2006: 238–239. Holotype ♀ (
Pristiphora krausi is only known from the holotype. Its character combination of bifid claws, in dorsal view short and emarginate valvula 3, and yellow and black colour pattern of head and body, suggest that it may belong to the Pristiphora depressa group (
A single larva was obtained in northern Sweden by combing through the leaves of an isolated clump of Dryas octopetala, under which an inverted frisbee was held. The plant was growing on an otherwise bare patch of soil at the edge of a road. Gene sequences of the larva are nearly identical to those of Pristiphora malaisei imagines collected in the same area. Although the specimen (Fig.
Sweden: Torne Lappmark: 1 larva (DEI-GISHym83704), from Dryas octopetala, Abisko National Park (380 m), 68.35300N, 18.76300E, 06.08.2017, leg. Liston & Prous (
See
1 |
a Pronotum completely black, or only extreme upper and rear edges brown (Fig. |
*Stauronematus platycerus (Hartig, 1840) |
— |
aa Pronotum almost completely pale white or bright yellow, only ventral margins black (Fig. |
Stauronematus saliciphilus Liston, 2007 |
Stauronematus 134 platycerus DEI-GISHym19761 ♀ lateral 135 saliciphilus holotype ♀ DEI-GISHym11427 lateral 136 platycerus DEI-GISHym11317 lancet 137 saliciphilus DEI-GISHym11427 lancet 138 platycerus DEI-GISHym19762 penis valve 139 saliciphilus DEI-GISHym11435 penis valve. Scale bar: 1 mm (134).
Nematus platycerus
Hartig, 1840: 27. Lectotype ♂, designated by
Nematus vallator
Snellen van Vollenhoven, 1858: 191–194, pl. 12. Lectotype ♀, examined, designated by
Nematus cebrionicornis
Costa, 1859: 20. Syntype(s) ♂, not examined, most likely in
Nematus callicerus
Thomson, 1863: 619–620. Lectotype ♀, designated by
Body length: female 4.5–7.5 mm, male 4.5–6.0 mm. Head black, except for mandibles and palpi. Pronotum completely black, or only extreme upper and rear edges brown. Mesepisternum more densely pubescent above than below but usually without entirely glabrous area on lower half. Hind coxa with at least basal half black. Trochanters and femora completely pale (yellowish). Tibia more whitish: pro- and mesotibia and pro- and mesobasitarsus entirely pale, with rest of tarsus darkened. Metatibia with approx. apical third black but spurs pale. Metatarsus black. Wing membrane hyaline; venation largely pale except for dark fore wing stigma. Abdomen entirely black. Female: head in dorsal view subparallel behind eyes. Antennae normal; not laterally compressed. Cerci pale to dark. Lancet: Fig.
When the shape of the claw is overlooked, Stauronematus adults are frequently misidentified as Pristiphora. The long, thin cerci of female Stauronematus, and the shape of the valvula 3 in dorsal view, are however quite different to any West Palaearctic Pristiphora species.
Host plants: mainly Populus spp., especially tremula, but also nigra, balsamifera, deltoides, alba, and many cultivated forms (
Found through much of continental Europe, from the Iberian Peninsula and Balkans, to Finland and Norway, and also the British mainland (
Published records: Skåne (
France: 2♀ (
The conclusions on the phylogeny of Nematinae reached by
Although the Nematini and Dineurini both comprise a relatively large number of genera, the large majority of Holarctic nematine species belong to just two genera of Nematini, Euura and Pristiphora. The proportional representation of genera and species in the Oriental Realm is at present unclear, but compared to the Holarctic Realm, existing data point to a lesser number of Euura species, and more Pristiphora, while the number of species belonging to diverse genera of non-Nematini may also be greater (
As noted above, the striking abundance and species diversity of nematine sawflies in the northern parts of the Palaearctic, including Fennoscandia, results mainly from the presence of numerous species of Euura and Pristiphora. Although several factors probably contribute to this pattern (
As can be seen from the key to larvae, the larvae of Nematinae exhibit a high level of morphological variability. This is expressed, for example, in the number of dorsal annulets of abdomen segments varying between three and six. By contrast, all European Tenthredininae larvae have seven annulets, six in Selandriinae [only Dolerus] or seven, six in each Athaliinae and Allantinae (
Although the genera which we have treated in this paper are comparatively species-poor, cases nevertheless occur of the sort of taxonomic problems which are regularly encountered in the much larger genera Pristiphora and Euura. An interesting example is Platycampus luridiventris, where three different (mitochondrial) genetic lineages exist. Earlier studies on this species concluded that genetic segregation was correlated with differences in host plant use, behaviour, and partly even the length of setae of larvae. Our own genetic data partly conflicts with this conclusion. Perhaps the apparent differences are caused by differential gene expression: a sort of host plant conditioning. At present, there are no compelling reasons to treat the lineages as separate taxonomic entities. A similar situation may occur in several groups of closely related nominal species of Euura, such as the gall-makers of the dolichura group and oblita group (ischnocera complex), which are thought to be highly host specific, but often exhibit neither clear morphological nor genetic differences (
This work was made possible through funding by the Swedish Taxonomy Initiative. For the loan of material, and access to collections, we thank Kees van Achterberg (