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Research Article
Contribution to the knowledge of Galumnoidea (Acari, Oribatida) of Cuba
expand article infoSergey G. Ermilov, Andrey T. Tolstikov
‡ Tyumen State University, Tyumen, Russia
Open Access

Abstract

An annotated checklist of identified oribatid mites of the superfamily Galumnoidea collected from Cuba, including ten species from four genera and two families, is provided. Galumna flabellifera Hammer, 1958, Pergalumna bifissurata Hammer, 1972, P. bryani (Jacot, 1934), P. decorata Balogh & Mahunka, 1977 and Galumnopsis secunda Sellnick, 1923 are recorded for the first time in the Cuban fauna. A new species of Pergalumna, P. cubaensis sp. n., is described; it is morphologically similar to P. decorata Balogh & Mahunka, 1977, but differs from the latter by the larger body size, heavily granulated prodorsum and well-developed interlamellar setae. The adult of Allogalumna cubana Balogh & Mahunka, 1979 is redescribed.

Keywords

Oribatid mites, Galumnoidea, new species, systematics, morphology, supplementary description, new record, Cuba

Introduction

At present, oribatid mites of the superfamily of Galumnoidea (Acari, Oribatida) are poorly known in the Cuban fauna (Balogh and Mahunka 1979; Jeleva et al. 1984; Palacios-Vargas and Socarrás 1993; Socarrás and Palacios-Vargas 1999). During taxonomic identification of material collected from Cuba, ten galumnoid species were found, including one new for science. The main goal of the paper is to describe this species under the name Pergalumna cubaensis sp. n.

The genus Pergalumna is a large genus with more than 140 species having a cosmopolitan distribution (Subías 2004, updated 2015). The updated generic diagnosis and identification key to known species in the Neotropical region were presented by Ermilov et al. (2013, 2014b).

Additionally, data are presented on the specific localities, with notes on new records, overall known distributions of registered taxa, and a supplementary description of Allogalumna cubana Balogh & Mahunka, 1979, which was described briefly and incompletely by Balogh and Mahunka (1979) from Cuba.

Material and methods

These results are based on collections from three localities in Cuba (unknown date and collector, mites were previously deposited in the Museum of Zoology of Tyumen State University, Russia):

  • Cuba 1: Parque Nacional Alejandro de Humboldt, 20°30'N, 74°40'W, leaf litter in forest.

  • Cuba 2. Cuba, Valle de Viñales National Park, 22°40'56.8"N, 83°42'57.5"W, Ancon, leaf litter in forest.

  • Cuba 3: Cayo Santa Maria, 22°66'21"N, 78°96'88"W, leaf litter in forest.

Specimens were mounted in lactic acid on temporary cavity slides for measurement and illustration. The body length was measured in lateral view, from the tip of the rostrum to the posterior edge of the ventral plate. Notogastral width refers to the maximum width in dorsal aspect. Lengths of body setae were measured in lateral aspect. All body measurements are presented in micrometers. Formulas for leg setation are given in parentheses according to the sequence trochanter–femur–genu–tibia–tarsus (famulus included). Formulas for leg solenidia are given in square brackets according to the sequence genu–tibia–tarsus. General terminology used in this paper follows that of Grandjean (summarized by Norton and Behan-Pelletier 2009). Drawings were made with a camera lucida using a Carl Zeiss transmission light microscope “Axioskop-2 Plus”.

Systematics

Pergalumna cubaensis sp. n.

Figs 1–2, 3–4, 5–11

Diagnosis

Body size: 962–1029 × 763–780. Prodorsum, epimeral region and antero-lateral parts of pteromorphs heavily granulated. Notogaster, anogenital region, pteromorphs and genital and anal plates striate. Rostral, lamellar, interlamellar and bothridial setae setiform, slightly barbed. Anterior notogastral margin well-developed. Three pairs of porose areas (Aa, A2, A3) rounded. Median pore and postanal porose area absent.

Description

Measurements. Body length: 1012 (holotype: female), 962, 1029 (two paratypes: female and male); notogaster width: 763 (holotype), 763, 780 (two paratypes).

Integument. Body color black-brownish. Prodorsum, epimeral region and antero-lateral parts of pteromorphs heavily granulated; granules rounded or slightly elongated, their diameter or length up to 6. Notogaster, anogenital region, pteromorphs and genital and anal plates striate.

Prodorsum. Rostrum broadly rounded. Lamellar (L) and sublamellar (S) lines distinct, parallel, curving backwards. Rostral (ro, 77–86) and lamellar (le, 53–65) setae thin, slightly barbed, directed antero-medially. Interlamellar setae (in, 86–90) setae setiform, indistinctly barbed, directed medially. Bothridial setae (bs, 110–123) setiform, slightly barbed, directed postero-laterad. Exobothridial setae and their alveoli absent. Porose areas Ad absent.

Notogaster. Anterior notogastral margin well developed. Dorsophragmata (D) of medium size, elongated longitudinally. Notogastral setae represented by ten pairs of alveoli. Three pairs of porose areas (Aa, A2, A3) rounded, similar in diameter (20–24), with clear borders. Areas Aa located between setal alveoli la and lm, equal distanced from them. Median pore absent in male and females. All lyrifissures (ia, im, ip, ih, ips) distinct, im and opisthonotal gland openings (gla) located antero-laterally to A2.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae typical for Pergalumna (Engelbrecht 1972; Ermilov and Anichkin 2011; Ermilov et al. 2014a). Subcapitulum size: 200–205 × 196–200. Subcapitular setae setiform, slightly barbed, a (36–41) longer than m (28–32) and h (24–28); a thickest, h thinnest. Two pairs of adoral setae (or1, or2, 24–28) setiform, barbed. Palp length: 176. Axillary sacculi (sac) distinct. Chelicera length: 303. Cheliceral setae setiform, barbed, cha (106) longer than chb (61).

Epimeral and lateral podosomal regions. Anterior tectum of epimere I smooth. Setal formula: 1–0–2–3. Setae thin, slightly barbed, 1b, 3b, 3c and 4c (41–49) longer than 4a and 4b (24–28) Pedotecta II trapezoid in ventral view. Discidia sharply triangular. Circumpedal carinae (cp) reaching insertions of 3b.

Anogenital region. Six pairs of genital (g1, g2, 36–45; g3g6, 20–28), one pair of aggenital (ag, 20–28), two pairs of anal (an1, an2, 20–28) and three pairs of adanal (ad1ad3, 20–28) setae thin, indistinctly barbed. Genital plates with two genital setae on anterior edge. Adanal lyrifissures (iad) located diagonally to anal plates. Distance ad1ad2 shorter than ad2ad3. Setae ad3 inserted laterally to iad. Postanal porose area absent.

Legs. Morphology of leg segments, setae and solenidia typical for Pergalumna (see Engelbrecht 1972; Ermilov and Anichkin 2011; Ermilov et al. 2014a). Tridactylous, claws smooth. Formulas of leg setation and solenidia: I (1–4–3–4–20) [1–2–2], II (1–4–3–4–15) [1–1–2], III (1–2–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1. Solenidion φ of tibiae IV inserted dorsally at about 2/3 length of segment.

Figures 1–2.

Pergalumna cubaensis sp. n., adult: 1 dorsal view (striae and granules are shown partially) 2 anterior part of body, lateral view (gnathosoma and leg I not illustrated, striae and granules are shown partially). Scale bar 200 µm.

Figures 3–4.

Pergalumna cubaensis sp. n., adult: 3 ventral view (gnathosoma and legs not illustrated, striae and granules are shown partially) 4 posterior view. Scale bar 200 µm.

Figures 5–11.

Pergalumna cubaensis sp. n., adult: 5 rostrum, frontal view (granules are shown partially) 6 interlamellar seta and part of sejugal region 7 bothridial seta 8 subcapitulum (in dissected specimen), ventral view 9 right genital plate and part of epimeral and aggenital regions (granules are shown partially) 10 right anal plate and part of adanal region 11 tibia of leg IV, left, antiaxial view. Scale bars 100 µm (5, 6, 8–11), 50 µm (7).

Leg setation and solenidia of adult Pergalumna cubaensis sp. n. (same data for Allogalumna cubana Balogh & Mahunka, 1979).

Leg Tr Fe Ge Ti Ta
I v d, (l), bv’’ (l), v’, σ (l), (v), φ1, φ2 (ft), (tc), (it), (p), (u), (a), s, (pv), v’, (pl), l’’, ε, ω1, ω2
II v d, (l), bv’’ (l), v’, σ (l), (v), φ (ft), (tc), (it), (p), (u), (a), s, (pv), ω1, ω2
III v d, ev l’, σ l’, (v), φ (ft), (tc), (it), (p), (u), (a), s, (pv)
IV v d, ev d, l l’, (v), φ ft’’, (tc), (p), (u), (a), s, (pv)

Material examined

Locality Cuba 1: holotype (female) and two paratypes (female and male).

Type deposition

The holotype is deposited in the collection of the Senckenberg Museum, Görlitz, Germany; two paratypes are in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology

The specific name cubaensis refers to the country of origin, Cuba.

Remarks

Pergalumna cubaensis sp. n. is morphologically most similar to P. decorata Balogh & Mahunka, 1977 from the Neotropical region (see Balogh and Mahunka 1977) in having a rounded rostrum, a striate notogaster, an anterior margin of notogaster, three pairs of rounded porose areas on the notogaster, and setiform bothridial setae. However, the new species differs from the latter by the larger body size (962–1029 × 763–780 vs. 637–653 × 469–494 in P. decorata), a heavily granulated prodorsum (vs. striate in P. decorata), and the interlamellar setae being of medium size (vs. minute in P. decorata).

Allogalumna cubana Balogh & Mahunka, 1979

Figs 12–13, 14–15, 16–23

Supplementary description

Measurements. Body length: 332–348 (12 specimens: six females and six males); notogaster width: 232–249 (12 specimens). Without sexual dimorphism.

Integument. Body color brown to light brown. Body surface punctate (visible under high magnification, ×1000).

Prodorsum. Rostrum broadly rounded. Sublamellar lines distinct, curving backwards. Rostral (12–16) and lamellar (6–8) setae thin, smooth, directed antero-medially. Interlamellar setae minute (2). Bothridial setae (65–73) with elongated, unilaterally dilated and sparsely ciliated head, directed postero-laterad. Exobothridial setae and their alveoli absent. Porose areas Ad oval, transversally oriented (8 × 4), usually visible only in dissected specimens.

Notogaster. Anterior notogastral margin not developed. Dorsophragmata of medium size, elongated longitudinally. Notogastral setae represented by 10 pairs of alveoli. Four pairs of porose areas without clear borders: Aa oval, slightly transversally oriented (32–41 × 20), but it seems round in dorsal view; A1 rounded (12–16); A2 (16–20 × 10–12) and A3 (16–24 × 12–16) oval. Areas Aa located antero-medially to la. Often small additional porose parts (Aad; one to three represented by five to nine heavily pores) present nearly of Aa, but they visible only high magnification (Fig. 19). Median pore absent in males and females. All lyrifissures distinct, im located between lm and A1. Opisthonotal gland openings located laterally to A1.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae similar to Pergalumna cubaensis sp. n. Subcapitulum size: 86–90 × 82–86. Subcapitular setae setiform, slightly barbed, a (14–16) longer than m (10–12) and h (8); a thickest, h thinnest. Two pairs of adoral setae (8) setiform, barbed. Palp length: 69. Axillary sacculi distinct. Chelicera length: 127. Cheliceral setae setiform, barbed, cha (32) longer than chb (20).

Epimeral and lateral podosomal regions. Anterior tectum of epimere I smooth. Setal formula: 1–0–1–2. Setae thin, smooth, 1a, 3b and 4a (10) longer than 4b (6) Pedotecta II rectangular, rounded distally in ventral view. Discidia sharply triangular. Circumpedal carinae clearly not reaching insertions of 3b.

Anogenital region. Six pairs of genital (g1, g2, 10; g3g6, 6), one pair of aggenital (4), two pairs of anal (4) and three pairs of adanal (4) setae thin, smooth. Genital plates with two genital setae on anterior edge. Adanal lyrifissures located parallel to anal plates. Distance ad1ad2 shorter than ad2ad3. Setae ad3 inserted laterally to iad. Postanal porose area oval, transversally oriented (12–16 × 6–10).

Legs. Morphology of leg segments, setae and solenidia, formulas of leg setation and solenidia similar to Pergalumna cubaensis sp. n. (Table 1), but solenidion φ of tibiae IV inserted dorsally at about 1/3 length of segment, directed backwards in basal part.

Figures 12–13.

Allogalumna cubana Balogh & Mahunka, 1979, adult: 12 dorsal view (microfoveolae are shown partially) 13 anterior part of body, lateral view (gnathosoma and leg I not illustrated). Scale bar 100 µm.

Figures 14–15.

Allogalumna cubana Balogh & Mahunka, 1979, adult: 14 ventral view (gnathosoma and legs not illustrated) 15 posterior view. Scale bar 100 µm.

Figures 16–23.

Allogalumna cubana Balogh & Mahunka, 1979, adult: 16 rostrum, frontal view 17 interlamellar seta and part of sejugal region 18 bothridial seta 19 left setal alveolus c and porose area Aa with additional areas 20 subcapitulum (in dissected specimen), ventral view (microfoveolae are shown partially) 21 right genital plate and part of epimeral and aggenital regions (microfoveolae are shown partially) 22 left anal plate and part of adanal region (microfoveolae are shown partially) 23 tibia of leg IV, left, antiaxial view. Scale bars 20 µm.

Material examined

Locality Cuba 2: 12 specimens (six females and six males).

Remarks

The Cuban specimens of A. cubana from Balogh and Mahunka’s description (1979) and our specimens are identical morphologically. Hence, based on these data, the main characters of A. cubana are: small body size (328–348 × 232–251); body surface indistinctly punctate; rostrum rounded; rostral setae longer than lamellar setae, all thin, smooth; interlamellar setae minute; bothridial setae with elongated, unilaterally dilated and sparsely ciliated head; anterior notogastral margin not developed; four pairs of oval/rounded porose areas, Aa slightly transversally oriented; median pore absent; epimeral and anogenital setae thin, smooth; setae ad3 inserted laterally to iad; postanal porose area present; tridactylous.

Records

Galumna angularis Jeleva, Scull & Cruz, 1984 (see Jeleva et al. 1984; Mahunka 1985; Pérez-Íñigo and Baggio 1994). Distribution: Neotropical region.

Material examined. Locality Cuba 1: 11 specimens.

Galumna flabellifera Hammer, 1958 (see Hammer 1958; Aoki 1964, 1982; Mahunka 1978). Distribution: Pantropical and Subtropical regions. New record in Cuba.

Material examined. Locality Cuba 2: 16 specimens.

Galumna sp. Species is morphologically similar to Galumna lunaris Jeleva, Scull & Cruz, 1984 (see Jeleva et al. 1984).

Material examined. Locality Cuba 3: 4 specimens.

Remarks. Jeleva et al. (1984) unclearly described G. lunaris from Cuba, therefore we could not identify our species without studying of the type material.

Pergalumna bifissurata Hammer, 1972 (see Hammer 1972; Ermilov et al. 2014). Distribution: Polynesia and Neotropical region. New record in Cuba.

Material examined. Locality Cuba 1: 22 specimens.

Pergalumna bryani (Jacot, 1934) (see Jacot 1934; Hammer 1973). Distribution: Pacific Islands and Neotropical region. New record in Cuba.

Material examined. Locality Cuba 2: 5 specimens.

Pergalumna decorata Balogh & Mahunka, 1977 (see Balogh and Mahunka 1977). Distribution: Neotropical region. New record in Cuba.

Material examined. Locality Cuba 1: 7 specimens.

Pergalumna sp. Species is morphologically similar to Galumna brasiliensis Sellnick, 1923 (see Sellnick 1923).

Material examined. Locality Cuba 1: 22 specimens; Locality Cuba 2: 18 specimens; Locality Cuba 3: 6 specimens.

Remarks. Sellnick (1923) briefly described several species of Galumna (including G. brasiliensis) from Brazil. To date, G. brasiliensis has not been redescribed in detail. Lamellar seta appear to be inserted medially to the lamellar line according to figure 27 in Sellnick (1923); therefore there is a probability, that G. brasiliensis is a representative of Pergalumna. Hence, the systematic position of G. brasiliensis should be investigated further.

Galumnellidae

Galumnopsis secunda Sellnick, 1923 (see Sellnick 1923). Distribution: Neotropical region. New record in Cuba.

Material examined. Locality Cuba 2: 5 specimens.

Acknowledgements

We cordially thank Prof. Dr. Badamdorj Bayartogtokh (National University of Mongolia, Ulaanbaatar, Mongolia) and one anonymous reviewer for the valuable comments and Dr. Dania Prieto (University of Havana, Cuba) for collaboration. The taxonomic study on Galumnoidea was supported by the Russian Foundation for Basic Research (project: 15-04-02706 A).

References

  • Aoki J (1964) Some oribatid mites (Acarina) from Laysan Island. Pacific Insects 6(4): 649–664.
  • Aoki J (1982) New species of oribatid mites from the southern island of Japan. Bulletin Institute of Environmental Science and Technology, Yokohama National University 8: 173–188.
  • Balogh J, Mahunka S (1977) New data to the knowledge of the oribatid fauna of Neogaea (Acari). I. Acta Zoologica Academiae Scientiarum Hungaricae 23(1–2): 1–28.
  • Balogh J, Mahunka S (1979) New data to the knowledge of the oribatid fauna of the Neogaea (Acari). IV. Acta Zoologica Academiae Scientiarum Hungaricae 25(1–2): 35–60.
  • Engelbrecht CM (1972) Galumnids from South Africa (Galumnidae, Oribatei). Acarologia 14(1): 109–140.
  • Ermilov SG, Alvarado-Rodríguez O, Retana-Salazar AP (2014a) Contribution to the knowledge of Costa Rican oribatid mite fauna, with supplementary descriptions of Pergalumna silvatica and P. sura (Acari: Oribatida Galumnidae). Systematic and Applied Acarology 19(2): 216–222. doi: 10.11158/saa.19.2.12
  • Ermilov SG, Alvarado-Rodríguez O, Retana-Salazar AP (2014b) Two new species of Pergalumna (Acari, Oribatida, Galumnidae) from Costa Rica, including a key to all species of the genus from the Neotropical region. ZooKeys 435: 7–23. doi: 10.3897/zookeys.435.8213
  • Ermilov SG, Anichkin AE (2011) New oribatid mites of the genera Pergalumna and Galumnella (Acari, Oribatida, Galumnoidea) from Vietnam. Acarina 19(2): 242–251.
  • Ermilov SG, Starý J, Sandmann D, Marian F, Maraun M (2013) New taxa and new records of oribatid mites of the family Galumnidae (Acari: Oribatida) from Ecuador. Zootaxa 3700(2): 259–270. doi: 10.11646/zootaxa.3700.2.4
  • Ermilov SG, Tolstikov AV, Salavatulin VM (2014) Supplementary description of two galumnid mites, Pergalumna tsavoensis and P. bifissurata (Acari, Oribatida, Galumnidae). Acarina 22(2): 63–70.
  • Hammer M (1958) Investigations on the oribatid fauna of the Andes Mountains. I. The Argentine and Bolivia. Det Kongelige Danske Videnskabernes Selskab Biologiske Skrifter 10(1): 1–129.
  • Hammer M (1972) Investigations on the oribatid fauna of Tahiti, and some oribatids found on the Atoll Rangiroa. Det Kongelige Danske Videnskabernes Selskab Biologiske Skrifter 19(3): 1–66.
  • Hammer M (1973) Oribatids from Tongatapu and Eua, the Tonga Islands, and from Upolu, Western Samoa. Det Kongelige Danske Videnskabernes Selskab Biologiske Skrifter 20(3): 1–70.
  • Jacot AP (1934) Some Hawaiian Oribatoidea (Acarina). Bernice P. Bishop Museum Bulletin, Honolulu 121: 1–99.
  • Jeleva M, Scull I, Cruz J (1984) Acaros oribátidos de los suelos pecuarios cubanos. Primera parte. Revista Cubana de Ciencias Veterinarias 15(2): 165–169.
  • Mahunka S (1978) Neue und interessante milben aus dem Genfer museum XXXIV. A compendium of the oribatid (Acari) fauna of Mauritius, Reunion and the Seychelles Is. II. Revue suisse de Zoologie 85(2): 307–340. doi: 10.5962/bhl.part.82234
  • Mahunka S (1985) Mites (Acari) from St. Lucia (Antilles). 2. Oribatida. Acta Zoologica Hungarica 31(1–3): 119–178.
  • Norton RA, Behan-Pelletier VM (2009) Chapter 15: Oribatida. In: Krantz GW, Walter DE (Eds) A Manual of Acarology. Texas Tech University Press, Lubbock, 430–564.
  • Palacios-Vargas JG, Socarrás AA (1993) Nuevos registros de acaros oribátidos (Acarida: Oribatei) de suelos pecuarios de Cuba. Boletin de la Siciedad Mexicana de Entomologica 13: 13–15.
  • Pérez-Íñigo C, Baggio D (1994) Oribates édaphiques du Brésil (VIII). Oribates de l’état de São Paulo (Cinquieme partie). Acarologia 35(2): 181–198.
  • Sellnick M (1923) Oribatideos Brasilieros, I. Galumnidae. Arch Mus Nac 24: 303–320.
  • Socarrás AA, Palacios-Vargas JG (1999) Catálogo de los Oribatei (Acarina) de Cuba. Poeyana 470–475: 1–8.
  • Subías LS (2004) Listado sistemático, sinonímico y biogeográfico de los ácaros oribátidos (Acariformes: Oribatida) del mundo (excepto fósiles). Graellsia 60(número extraordinario): 3–305. Online version accessed in March 2015, 587 pp.