Chistyakovella insolita, Ermilov, Sergey G., Aoki, Jun-Ichi & Anichkin, Alexander E., 2013

Ermilov, Sergey G., Aoki, Jun-Ichi & Anichkin, Alexander E., 2013, Description of Chistyakovella insolita gen. nov., sp. nov., and redescription of the type species of Diplobodes, D. kanekoi Aoki, 1958 (Acari: Oribatida: Carabodidae), Zootaxa 3608 (3), pp. 178-190 : 182-183

Chistyakovella insolita sp. nov.

( Figures 1 –21)

With character states of Chistyakovella gen. nov. as listed above.

Diagnosis. Body size 348–448 × 199–249. Surface of notogaster and anogenital region tuberculate. Rostral and interlamellar setae slightly thickened and barbed. Lamellar setae covered with spines. Notogastral setae (12–16) slightly thickened and barbed. Ventral setae short; epimeral and adanal setae slightly barbed, and genital, aggenital, anal setae smooth. Leg claws with small barbs on dorsal side. Tarsus IV with 12 setae. Solenidion φ on tibiae II with membrane on ventral side.

Description. Measurements. Body length 381 (holotype), 348–448 (mean 395; five paratypes); body width 215 (holotype), 199–249 (mean 229; five paratypes).

Integument ( Figs 1–3 , 4, 9, 11, 15, 16, 19, 21). Body color brown. Centrodorsal surface of prodorsum smooth. Surface of notogaster, pleural region (between notogaster and epimeral regions) and anogenital region tuberculate (diameter of tubercles up to 8). Lateral sides of prodorsum, the lamellae, subcapitular mentum, femora and trochanters III, IV foveolate (diameter of foveolae up to 6). Genital and anal plates with round and oblong foveolae.

Prodorsum ( Figs 1, 3 , 4, 6–8). Rostrum rounded. Lamellae with central, shallow depression and lateral elevation. Rostral (ro, 16) and interlamellar (in, 16) setae slightly thickened and barbed. Lamellar setae (le, 32) considerably thicker, covered with spines. Sensilli (ss, 57–65) longest setae on prodorsum, with strong spines unilaterally. Exobothridial setae and their alveoli absent. Tutorium (tu) long.

Notogaster ( Figs 1, 3 , 5, 10). Anterior notogastral margin straight. Notogastral setae (12–16) slightly thickened and barbed. Lyrifissures and opistonotal gland openings not evident.

Gnathosoma (Figs 11–13). Subcapitulum longer than wide (82–90 × 61–69). Subcapitular setae h (4–6) and a (8–10) setiform, slightly barbed; setae m (6–8) slightly dilated medially, barbed. Adoral setae absent. Palps (53) with setation 0–2–1–3–9(+ω). Solenidion long, thickened, blunt-ended, not attached to eupathidium (acm), adpressed to surface of palptarsus. Chelicerae (90–98) with two barbed setae; cha (32–36) longer than chb (12–16). Trägårdh’s organ (Tg) distinct.

Epimeral and lateral podosomal regions ( Figs 2 , 14). Epimeral setae minute (2–4), slightly barbed. Pedotecta I (Pd I) convex; pedotecta II (Pd II) widely triangular, rounded distally. Discidia (di) triangular, blunt distally.

Anogenital region ( Figs 2 , 5, 15–17). Four pairs of genital (g 1– g 4, 4–6), one pair of aggenital (ag, 2–4) and two pairs of anal (an 1, an 2, 2–4) setae, all short, smooth. Three pairs of adanal setae (ad 1– ad 3, 8–10) longer, slightly thickened and barbed. Lyrifissures iad not evident.

Legs (Figs 18–21). Leg claws with several, small barbs on dorsal side and tooth (t) on ventral side. Formulae of leg setation and solenidia: I (1–4–3–4–16) [1–2–2], II (1–4–3–3–15) [1–1–2], III (2–3–1–2–15) [1–1–0], IV (1–2–2–2–12) [0–1–0]; homology of setae and solenidia indicated in Table 1 . Famulus short, setiform, bluntended. Setae u short, spine-like; other setae setiform (rarely widely lanceolate), many of which are barbed. Solenidia blunt-ended; solenidion φ on tibiae II with membrane on ventral side.

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; two paratypes are deposited in the collection of Siberian Zoological Museum, Novosibirsk, Russia; three paratypes are in the personal collection of the first author. Etymology. The specific name insolita is Latin for “unusual” and refers to the atypical morphology of the lamellae for the family Carabodidae .

Figures

FIGURES 1 – 3. Chistyakovella insolita sp. nov.: 1 — dorsal view; 2 — ventral view, gnathosomal setae and legs (except trochanters III, IV) not shown; 3 — lateral view, gnathosomal, epimeral and anogenital setae, discidium and legs (except trochanters III, IV) not shown. Scale bar 100 μm.

Tables

TABLE 1. Leg setation and solenidia of Chistyakovella insolita sp. nov.

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