Cycloppia asetosa, Ermilov, Sergey G. & Kalúz, Stanislav, 2013

Ermilov, Sergey G. & Kalúz, Stanislav, 2013, Three new species of Oppioidea (Acari: Oribatida) from India, Zootaxa 3670 (4), pp. 482-492 : 483-486

Cycloppia asetosa sp. nov.

( Figs 1–15 )

Diagnosis. Body size 547–581 × 315–348. Body surface smooth. Rostrum with median indentation. Rostral seta longer than lamellar seta. Interlamellar and exobothridial setae and their alveoli absent. Sensillus spindle-form. Lamellar seta inserted nearer to bothridium than to rostral seta. Alveolus of setae c present, the other nine pairs of notogastral setae of medium length. Lyrifissure iad located in inverse apoanal position.

Description. Measurements. Body length 547 (holotype), 547–581 (mean 564; six paratypes); notogaster width 332 (holotype), 315–348 (mean 329; six paratypes).

Integument ( Figs 1, 3 , 8 ). Body color light brown. Body surface smooth. Subcapitular mentum and genae densely microfoveolate (visible under high magnification, × 1000). Lateral side of prodorsum microgranulate, latero-dorsal side with three to four muscle sigillae and transversal, short, thin fold (fl).

Prodorsum ( Figs 1, 3, 4–6 ). Rostrum with median indentation. Lamellar and translamellar lines absent. Rostral (ro, 41–49) and lamellar (le, 32–36) setae setiform, barbed. Lamellar seta inserted nearer to bothridium than to rostral seta. Interlamellar and exobothridial setae and their alveoli absent. Sensillus (ss, 90–102) spindle-form, slightly barbed. Interbothridial region with one pair of tubercles, which are directed to anterior margin of notogaster.

Notogaster ( Figs 1, 3 , 7 ). Anterior margin weakly convex. Alveolus of setae c present. Nine pairs of notogastral setae of medium length; p 1 and p 2 (41–49) shorter than others (57–77). Seta la inserted lateroposteriorly to lm. Lyrifissures ia, im, ip, ih and ips distinct, thin, located typically for genus. Opisthonotal gland opening (gla) located latero-posteriorly to seta h 3.

Gnathosoma ( Figs 8–10 ). Subcapitulum longer than wide (110–123 × 77–82). Subcapitular setae setiform, slightly barbed; h and m (both 32–36) longer than a (24–28). Adoral setae (or 1, or 2) short (6), thorn-like, smooth. Palp (61–73) with setation 0–2–1–3–8(+ω). Solenidion long, thickened, blunt-ended, pressed to the palptarsus surface. Chelicera (118–123) with two setiform, barbed setae; cha (32–36) longer than chb (16–20). Trägårdh’s organ (Tg) long, conical.

Epimeral and lateral podosomal regions ( Figs 2, 3 ). Epimeral setae 1c, 3c and 4c (41–57) longer than others (20–28). Pedotectum I (Pd I) convex. Discidium (dis) large, triangular.

Anogenital region ( Fig. 2 ). Four pairs of genital (g 1– g 4, 10–16), one pair of aggenital (ag, 24–36), two pairs of anal (an 1, an 2, 20–32) and three pairs of adanal (ad 1– ad 3, 36–41) setae setiform, slightly barbed. Lyrifissure iad located in inverse apoanal position.

Legs ( Figs 11–15 ). Generally, the morphology is similar to other representatives of Cycloppia ( Ohkubo 2003) . Formulae of leg setation and solenidia: I (1–5–2–4–20) [1–2–2], II (1–5–2–4–16) [1–1–2], III (2–3–1–3–15) [1–1– 0], IV (1–2–2–3–12) [0–1–0]; homology of setae and solenidia indicated in Table 1 . Seta p setiform on tarsus I and thorn-like, very small on tarsi tarsi II–IV. Famulus (e) straight, blunt-ended. Solenidia ω 1 on tarsus I, ω 1 and ω 2 on tarsus II, σ on tibia III thickened, blunt-ended; other solenidia setiform, thinner and longer.

Roman letters refer to normal setae (e to famulus), Greek letters to solenidia. Single prime (') marks setae on anterior and double prime (") setae on posterior side of the given leg segment. Parentheses refer to a pair of setae.

Type deposition. The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; six paratypes are in the collection of the Siberian Zoological Museum, Novosibirsk, Russia.

Etymology. The specific name “ asetosa ” refers to the absence of interlamellar setae.

Remarks. Cycloppia asetosa sp. nov. clearly differs from all species of the genus Cycloppia by the presence of median indentation on rostrum (versus rounded rostrum) and the absence of interlamellar setae and their alveoli (versus developed interlamellar setae or their alveoli).

Figures

FIGURES 1 – 4. Cycloppia asetosa sp. nov., adult: 1 — dorsal view (legs not shown); 2 — ventral view (gnathosoma and legs not shown); 3 — lateral view of prodorsum (gnathosoma, epimeral setae and legs not shown) and anterior part of notogaster; 4 — rostrum and rostral setae. Scale bars (1 – 3) 100 μm, (4) 20 μm. The following figures to same scale: 1 – 3.

FIGURES 5 – 15. Cycloppia asetosa sp. nov., adult: 5 — lamellar seta; 6 — sensillus; 7 — notogastral seta lm; 8 — subcapitulum, right half; 9 — palptarsus; 10 — anterior part of chelicera; 11 — tarsus and tibia (posterior part not shown) I, antiaxial view; 12 — genu II, dorsal view; 13 — genu III, antiaxial view; 14 — tarsus IV, antiaxial view; 15 — tibia IV (posterior part not shown), antiaxial view. Scale bars (5 – 7, 9, 10) 10 μm, (8) 20 μm, (11 – 15) 50 μm. The following figures to same scale: 5 – 7; 11 – 15.

Tables

TABLE 1. Leg setation and solenidia of Cycloppia asetosa sp. nov. (same for C. spindleformis sp. nov. and Hammerella (H.) excisa sp. nov.).

Leg	Trochanter	Femur	Genu	Tibia	Tarsus
I	v'	d, (l), bv'', v''	(l), σ	(l), (v), φ1, φ2	(ft), (tc), (it), (p), (u), (a), s, (pv), v', (pl), l'', e, ω1, ω2
II	v'	d, (l), bv'', v''	(l), σ	(l), (v), φ	(ft), (tc), (it), (p), (u), (a), s, (pv), l'', ω1, ω2
III	l', v'	d, l', 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)