Neoribates (Neoribates) parabulanovae, Ermilov, Sergey G. & Martens, Jochen, 2014

Ermilov, Sergey G. & Martens, Jochen, 2014, Three new species of the subgenus Neoribates (Neoribates) (Acari, Oribatida, Parakalummidae) from Nepal, ZooKeys 431, pp. 19-32 : 19-21

Taxon classification Animalia Sarcoptiformes Parakalummidae

Neoribates (Neoribates) parabulanovae sp. n. Figs 1-4

Diagnosis.

Body size: 946-1062 × 697-763. Body surface densely microfoveolate; anterior part of rostrum, subcapitular genae and leg segments III, IV with larger, sparse foveoles. Rostral, lamellar and interlamellar setae well developed, barbed. Bothridial setae setiform, slightly barbed. Saccular openings short. Subcapitular setae h and m longer than a; h thickest. Five pairs of genital setae present. Aggenital setae absent. Adanal setae short, ad3 inserted in preanal position. Tridactylous.

Description.

Measurements. Body length: 1012 (holotype), 946-1062 (four paratypes); notogaster width: 697 (holotype), 713-763 (four paratypes).

Integument. Body color brown. Body surface densely microfoveolate (diameter of microfoveoles less than 1; visible only under high magnification in dissected specimens, × 1000). Anterior part of rostrum, subcapitular genae and leg segments III, IV with larger, sparse foveoles (their diameter up to 4).

Prodorsum. Rostrum weakly protruding, rounded. A small tubercle (tb) is present in medial part nearly to rostrum. Lamellae distinct, reaching the insertions of alveoli of lamellar setae. Rostral setae (ro, 118-131) setiform, barbed. Lamellar (le, 192-200) and interlamellar (in, 278-287) setae setiform, with short attenuate tip, barbed. Exobothridial setae short (8), thin, smooth. Bothridial setae (ss, 192-200) setiform, slightly barbed on dorsal side.

Notogaster. Anterior notogastral margin convex. Notogastral setae represented by 10 pairs of alveoli or microsetae (1). Four pairs of sacculi (Sa, S1-S3) present, their openings short, thin. Alveoli/microsetae lp inserted laterally to S1. Opisthonotal gland openings (gla) located laterally to sacculi S1. Lyrifissures im located between gla and setal alveolus lm.

Gnathosoma. Generally, morphology of subcapitulum, palps and chelicerae typical as for most Neoribates (Neoribates) (see for example Grishina and Vladimirova 2009; Ermilov and Kalúz 2013; Ermilov and Anichkin 2014). Subcapitulum longer than wide (188-196 × 143-147). Subcapitular setae setiform, slightly barbed; h (53-57) thicker than a (28-32), m (53-57) thinnest. Two pairs of adoral setae (20) setiform, densely bilaterally barbed. Palps (length 98) with setation 0 –2–1–3– 9(+ω). Solenidion attached to eupathidium. Chelicerae (length 188-196) with two barbed setae; cha (61) longer than chb (49). Trägårdh’s organ distinct.

Epimeral and lateral podosomal regions. Epimeral setal formula: 3 –1–3– 3. All setae setiform, slightly barbed; 1a, 1c, 2a, 3a (32-36) shorter than 1b, 3b, 4a, 4b (61-65) and 3c, 4c (77-86). Setae 1a, 2a, 3a located close to each other. Pedotecta I, II, discidia and circumpedal carinae (cp) normally developed.

Anogenital region. Five pairs of genital (g1-g5, 32-36), three pairs of adanal (ad1-ad3, 24-32) and two pairs of anal (an1, an2, 24-32) setae setiform, with sparse barbs. Genital setae g1 and g2 little thicker than g3-g5. Aggenital setae and their alveoli absent. Lyrifissures iad located in paraanal position, usually weakly diagonally to the anal aperture. Adanal setae ad3 inserted in preanal position.

Legs. Generally, morphology of leg segments, setae and solenidia typical for Neoribates (Neoribates) (see for example: Travé 1972; Grishina and Vladimirova 2009; Ermilov and Anichkin 2014). Leg tarsi with three smooth claws. 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 –3–1–3– 15) [1 –1– 0], IV (1 –2–2–4– 12) [0 –0– 0]; homology of setae and solenidia indicated in Table 1. Famulus (ε) short, straight, weakly dilated distally, blunted, inserted between ω 2 and ft’’. Many setae well barbed. Solenidia ω 2 on tarsi I, ω 1, ω 2 on tarsi II and σ on genua III thickened, blunted; other solenidia thinner, with attenuate tip.

Material examined.

Five specimens (holotype: male; four paratypes: three males, one female) of Neoribates (Neoribates) parabulanovae sp. n. are from central Nepal, 28°34'N, 83°98'E, 2100 m a.s.l., Kaski District, above Dhumpus, broadleaved forest, soil, 08-10.V.1980, collected by J. Martens & A. Ausobsky.

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 prefix para is Latin meaning “near” and refers to the similarity between the new species and the species Neoribates (Neoribates) bulanovae Grishina, 2009.

Remarks.

Neoribates (Neoribates) parabulanovae sp. n. is morphologically similar to Neoribates (Neoribates) bulanovae Grishina, 2009 (see Grishina and Vladimirova 2009) from eastern Mediterranean, Neoribates (Neoribates) rotundus Aoki, 1982 from Japan and Taiwan and Neoribates (Neoribates) setiger Balogh & Mahunka, 1978 from Australia in having the setiform bothridial setae. However, the new species differs from Neoribates (Neoribates) bulanovae by the larger body length (946-1062 versus 830-904 in Neoribates (Neoribates) bulanovae ), foveolate body integument and leg segments III, IV (versus smooth in Neoribates (Neoribates) bulanovae ), slightly barbed bothridial setae (versus well barbed in Neoribates (Neoribates) bulanovae ), absence of aggenital setae (versus present in Neoribates (Neoribates) bulanovae ), interlamellar setae longer than bothridial setae (versus similar in length in Neoribates (Neoribates) bulanovae ) and adanal setae ad3 located anteriorly to adanal lyrifissures (versus laterally in Neoribates (Neoribates) bulanovae ); from Neoribates (Neoribates) rotundus by the larger body size (946-1062 × 697-763 versus 810 × 660 in Neoribates (Neoribates) rotundus ), foveolate body integument (versus smooth in Neoribates (Neoribates) rotundus ), slightly barbed bothridial setae (versus smooth in Neoribates (Neoribates) rotundus ) and interlamellar setae longer than bothridial setae (versus shorter in Neoribates (Neoribates) rotundus ); from Neoribates (Neoribates) setiger by the larger body size (946-1062 × 697-763 versus 559-583 × 389-450 in Neoribates (Neoribates) setiger ), presence of five pairs of genital setae (versus four pairs in Neoribates (Neoribates) setiger ) and absence of aggenital setae (versus present in Neoribates (Neoribates) setiger ).