Ctenobelba (Berndamerus) bugiamapensis, Ermilov, Sergey G., Shtanchaeva, Umukusum Ya., Subias, Luis S. & Anichkin, Alexander E., 2014

Ermilov, Sergey G., Shtanchaeva, Umukusum Ya., Subias, Luis S. & Anichkin, Alexander E., 2014, The family Ctenobelbidae (Acari, Oribatida), with description of a new species and discussion on systematic placement and taxonomic status of the genus Berndamerus Mahunka, 1977, ZooKeys 395, pp. 1-10 : 2-4

Ctenobelba (Berndamerus) bugiamapensis sp. n. Figs 1-9

Diagnosis.

Body length 315-365 × 199-232. Dorsal body surface smooth, ventral body surface microfoveolate. Rostrum rounded. Transcostula poorly developed. All prodorsal setae setiform, barbed; lamellar setae longest and thickest. Sensilli setiform, ciliate Notogastral setae c longest, barbed; p1-p3 of medium size, barbed; other setae short, smooth. Setae c, la, lm inserted in one longitudinal row; lp, h2, h3 inserted close to each other. Aggenito-adanal neotrichy present: eight pairs of setiform, barbed setae developed.

Description.

Measurements. Body length: 348 (holotype), 315-365 (five paratypes); notogaster width: 215 (holotype), 199-232 (five paratypes).

Integument. Body color yellow-brownish to brown. Dorsal body surface smooth; ventral body surface (including subcapitular mentum, genital and anal plates) microfoveolate (diameter of foveolae up to 0.5), which is visible only under high magnification ( × 1500). The region adjacent to the anal aperture striate.

Prodorsum. Rostrum rounded. Costulae (cos) well developed, almost straight, as long as half of prodorsum (in lateral view). Transcostula (tcos) present, poorly visible. All prodorsal setae setiform, barbed: rostral setae (ro, 36-41) thin, inserted dorso-laterally; interlamellar setae (in, 73-82) slightly thicker than rostral setae, inserted posteriorly to costulae; lamellar setae longest (le, 94-98) and thickest, inserted on the costular tips; exobothridial setae shortest (ex, 24-32) and thinnest, inserted laterally on prodorsum. Sensilli (ss, 114-118) setiform, thickened, ciliate unilaterally. Lateral carinae (not tutoria) distinct (car).

Notogaster. Anterior border straight, slightly developed, with one pair of blunt-ended medial condyles. One pair of short humeral cristae present. Ten pairs of notogastral setae present: c (36-41) and p1-p3 (18-20) setiform, thin, barbed; other setae short (6-8), smooth. Setae c, la, lm, lp, h2, h3 located dorsally: c, la, lm inserted in one longitudinal row; lp, h2, h3 inserted close to each other. Setae h1 located dorso-posteriorly. Setae p1-p3 located posteriorly, in one transverse row; p1 inserted close to each other. Opisthonotal gland openings (gla) small, located laterally to setae lm. Lyrifissures ia located posteriorly to cristae. Lyrifissures im, ip, ih located dorso-laterally, ips–posteriorly; all nearly to muscle sigillar band. Circumventral carina (cv) distinct.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae typical for Ctenobelba ( Ermilov et al. 2012b). Subcapitulum longer than wide: 73-82 × 53-57. Subcapitular setae setiform, barbed; h and m (both 24-26) longer than a (12-16). Adoral setae absent. Palps (49-53) with setation 0 –2–1–3– 8(+ω). Solenidion long, thickened, not fused with acm, pressed to surface of palptarsus. Chelicerae (82-86) with two long, setiform, barbed setae; cha (24-26) longer than chb (16-18). Trägårdh’s organ (Tg) distinct.

Lateropodosomal and epimeral regions. Pedotecta I (Pd I), II (Pd II) large, scale-like. Apodemes I, II well developed; sejugal apodemes absent, represented only epimeral borders. Epimeral setal formula: 3 –1–3– 3. Setae setiform, barbed: 1b, 1c, 3b, 3c, 4c longer (73-77) and thicker than other (32-41).

Anogenital region. All anogenital setae setiform, barbed. Six pairs of genital (g1, 20-24; g2-g6, 12) and two pairs of anal (an1, an2, 20-24) setae short; genital setae inserted in one longitudinal row. Eight pairs of aggenito-adanal setae present (from these: two pairs of aggenital setae, ag; three pairs of adanal setae, ad1-ad3; three pairs of additional, neotrichial setae, n). Two pairs of lateral neotrichial setae longer (53-61) than other (32-41). Lyrifissures iad located in inverse apoanal position, distanced from the anal plates.

Legs. Claw of each leg smooth. Morphology of leg segments, setae and solenidia typical for Ctenobelba ( Ermilov et al. 2012b). Formulae of leg setation and solenidia: I (1 –5–3–4– 20) [1 –2– 2], II (1 –5–3–4– 15) [1 –1– 2], III (2 –3–2–3– 15) [1 –1– 0], IV (1 –2–3–3– 12) [0 –1– 0]; homology of setae and solenidia indicated in Table 1. Setae setiform, barbed (except smooth s on tarsi I and p). Famulus (e) short, thin. Solenidia slightly thickened, blunt-ended.

Type deposition.

The holotype (ethanol) is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; two paratypes (ethanol) are deposited in the collection of the Siberian Zoological Museum, Novosibirsk, Russia; three paratypes (ethanol) are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology.

The specific name “bugiamapensis” refers to the Vietnamese park of origin, Bu Gia Map National Park.

Comparison.

The new species is most similar to Ctenobelba (Berndamerus) eremuloides (Berlese, 1910) comb. n. in having the lamellar setae longer than rostral and interlamellar setae and the localization of notogastral setae, however, it differs from the latter by the smooth rostrum (versus with teeth), heterotrichy of notogastral setae (versus heterotrichy absent), aggenito-adanal region with eight pairs of setae (versus with six), and adanal lyrifissures located in inverse apoanal position (versus apoanal position).