Pergalumna cubaensis, Ermilov, Sergey G. & Tolstikov, Andrei V., 2015

Ermilov, Sergey G. & Tolstikov, Andrei V., 2015, Contribution to the knowledge of Galumnoidea (Acari, Oribatida) of Cuba, ZooKeys 537, pp. 65-78 : 66

Taxon classification Animalia Sarcoptiformes Galumnidae

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. 2014 a). 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; g3-g6, 20-28), one pair of aggenital (ag, 20-28), two pairs of anal (an1, an2, 20-28) and three pairs of adanal (ad1-ad3, 20-28) setae thin, indistinctly barbed. Genital plates with two genital setae on anterior edge. Adanal lyrifissures (iad) located diagonally to anal plates. Distance ad1-ad2 shorter than ad2-ad3. 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. 2014 a). 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.

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 Pergalumna 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 Pergalumna decorata ), a heavily granulated prodorsum (vs. striate in Pergalumna decorata ), and the interlamellar setae being of medium size (vs. minute in Pergalumna decorata ).