Lasiobelba (Lasiobelba) daamsae, Ermilov, Sergey G., Shtanchaeva, Umukusum Ya., Subias, Luis S. & Martens, Jochen, 2014

Ermilov, Sergey G., Shtanchaeva, Umukusum Ya., Subias, Luis S. & Martens, Jochen, 2014, Two new species of oribatid mites of Lasiobelba (Acari, Oribatida, Oppiidae) from Nepal, including a key to all species of the genus, ZooKeys 424, pp. 1-17 : 2-3

Taxon classification Animalia Oribatida Oppiidae

Description of Lasiobelba (Lasiobelba) daamsae sp. n. Figs 1-9

Diagnosis.

Body size: 1278-1310 × 747-863. Rostrum pointed. Prodorsal setae long, barbed; in ≈ le> ss ≈ ex> ro. Bothridial setae spindle-form, with long, thin apex, barbed. Nine pairs of notogastral setae long, barbed (p1-p3 shorter than others). Antero-medial part of rutelli with tooth. Anterior part of pedotecta I specifically curved. Anogenital setae barbed. Dorsal side of leg claws with small teeth.

Description.

Measurements. Body length: 1294 (holotype, male), 1278-1310 (four paratypes: males); notogaster width: 796 (holotype), 747-863 (four paratypes).

Integument (Figs 1, 3). Body color light brownish. Body surface smooth, but lateral parts of prodorsum with microgranulate cerotegument (diameter granules less than 1).

Prodorsum (Figs 1-3). Rostrum with conical tooth (tr, 12-16). A row, comprising several muscle sigillae, is located in front of the bothridia (usually very poorly visible). Muscle sigilla in interbothridial region absent, but one pair of longitudinal, dark brown structures are present. Rostral (ro, 199-232), lamellar (le, 365-381), interlamellar (in, 365-381) and exobothridial (ex, 265-298) setae well developed, setiform, barbed. Bothridial setae (ss, 265-298) spindle-form, barbed, with weakly developed elongate head and long, thin apex. A pair of triangular tubercles (tb) located posteriorly to bothridia.

Notogaster (Figs 1-3). Anterior border convex. Notogastral setae c represented by alveolus. Nine other pairs of notogastral setae long, barbed; p1-p3 (215-249) shorter than others (431-481). Lyrifissures ia poorly visible, im, ip, ih, ips and opisthonotal gland openings present, but visible under high magnification in dissected specimens.

Gnathosoma (Figs 2, 4, 5). Subcapitulum longer than wide (298-315 × 199-215). Antero-medial part of rutelli with tooth (ts, 8). Subcapitular setae setiform, barbed; a (66-83) shorter than m and h (both 116-132). Two pairs of adoral setae (or1, or2, 33-49) setiform, hook-like distally, smooth. Palps (199) with setation 0 –2–1–3– 8(+ω). Solenidion thickened, blunt-ended, pressed to the palptarsus surface in basal part and distal seta in distal part. Chelicerae (298-315) with two barbed setae; cha (99) longer than chb (66). One short tooth (4-6) located posteriorly to seta cha. Trägårdh’s organ distinct.

Epimeral and lateral podosomal regions (Figs 1-3). Apodemes (1, 2, sejugal, 4) weakly developed. Epimeral setae setiform, barbed; setae 1a, 2a, 3a (83-99) shorter than 1b, 1c, 3b, 4a, 4b (149-166) and 3c, 4c (199-232). Anterior part of pedotecta I (Pd I) elongate and specifically curved, forming a tooth (tpd). Discidia (dis) triangular, pointed.

Anogenital region (Figs 2, 3). Five pairs of genital (g1-g3, 74-83; g4, g5, 108-116), one pair of aggenital (ag, 166-199), three pairs of adanal (ad1-ad3, 166-199) and two pairs of anal (an1, an2, 149-166) setae setiform, barbed. Distance between setae ad3-ad3 longer than ad2-ad2 and ad1-ad1. Adanal lyrifissures iad located diagonally, but very close to anal aperture.

Legs (Figs 1, 6-9). Generally, morphology typical for species of Lasiobelba ( Bernini 1973; Ohkubo 2001; Ermilov and Kalúz 2012). Dorsal side of each claw in all tarsi with two rows of small teeth (tl). 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. Setae p setiform on tarsi I, very short, conical on tarsi II–IV. Famulus (ε) setiform, straight, pointed, inserted posteriorly to solenidion ω 1.

Type deposition.

The holotype and one paratype are deposited in the collection of the Senckenberg Institution Frankfurt, Germany; three paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology.

The specific name is dedicated to Mrs. Beate Daams for her assistance in Nepalese scientific researches.

Remarks.

In having the long notogastral setae, large body size and spindle-form bothridial setae, Lasiobelba (Lasiobelba) daamsae sp. n. is most similar to Lasiobelba (Lasiobelba) remota Aoki, 1959 from the Oriental and Palaearctic regions and Lasiobelba (Lasiobelba) gibbosa (Mahunka, 1985) from the Ethiopian region. However, it differs from both by the anterior part of pedotecta I specifically curved (versus straight in Lasiobelba (Lasiobelba) remota and Lasiobelba (Lasiobelba) gibbosa ), rostrum pointed (versus rounded in Lasiobelba (Lasiobelba) remota and nasiform in Lasiobelba (Lasiobelba) gibbosa ) and exobothridial setae not shorter than bothridial setae (versus shorter in Lasiobelba (Lasiobelba) remota and Lasiobelba (Lasiobelba) gibbosa ).