Neoribates (Neoribates) paramacrosacculatus, 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 : 21-23

Taxon classification Animalia Sarcoptiformes Parakalummidae

Neoribates (Neoribates) paramacrosacculatus sp. n. Figs 5-8

Diagnosis.

Body size: 780-830 × 547-581. Body surface densely microfoveolate. Rostral setae of medium size setiform. Lamellar setae represented by alveoli. Interlamellar setae represented by microsetae. Bothridial setae lanceolate, barbed; stalk and elongate head similar in length. Saccular openings long. Subcapitular setae m longer than a and h; a thickest. Five pairs of genital setae present. Medial parts of anal figs striate. Adanal setae ad3 inserted in lateral position. Tridactylous.

Description.

Measurements. Body length: 780 (holotype), 780, 830 (two paratypes); notogaster width: 547 (holotype), 581 (both paratypes).

Integument. Body color brown. Body surface densely microfoveolate (diameter of microfoveoles less than 1; visible only under high magnification in dissected specimens, × 1000). Medial parts of anal figs with longitudinal stria.

Prodorsum. Rostrum weakly protruding, rounded. Lamellae distinct, reaching the insertions of alveoli of lamellar setae. Rostral setae (53) setiform, slightly barbed, present in one paratype and brokened (only basal parts visible) in holotype and one paratype. Lamellar setae represented by alveoli. Interlamellar setae represented by microsetae (2). Exobothridial setae short (12), thin, smooth. Bothridial setae (77-82) of medium size, lanceolate, barbed; stalk and elongate head similar in length.

Notogaster. Anterior notogastral margin convex. Notogastral setae represented by 10 pairs of alveoli or microsetae (2-4). Four pairs of sacculi present, their openings long, thin, slit-like. Alveoli/microsetae lp inserted laterally to S1. Opisthonotal gland openings located laterally to succuli 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 (159-164 × 127-131). Subcapitular setae setiform, slightly barbed; a (16) thicker than m (24) and h (12). Two pairs of adoral setae (16) setiform, densely bilaterally barbed. Palps (length 110) with setation 0 –2–1–3– 9(+ω). Solenidion attached to eupathidium. Chelicerae (length 164) with two barbed setae; cha (61) longer than chb (45). Trägårdh’s organ distinct.

Epimeral and lateral podosomal regions. Epimeral setal formula: 3 –1–3– 3. All setae setiform, slightly barbed; 1a, 1b, 1c, 2a, 3a, 3b, 4a, 4b (16-20) shorter than and 3c, 4c (65-69). Setae 1a, 2a, 3a removed from each other. Pedotecta I, II, discidia and circumpedal carinae normally developed.

Anogenital region. Five pairs of genital (12-16), one pair of aggenital (ag, 16-20), three pairs of adanal (ad1, ad2, 24-32, ad3, 20) and two pairs of anal (16-20) setae setiform, indistinctly barbed. Lyrifissures iad located in paraanal position. Adanal setae ad3 inserted in lateral position, removed from the anal aperture.

Legs. Generally, similar to Neoribates (Neoribates) parabulanovae sp. n. (Table 1).

Material examined.

Three specimens (holotype: male; two paratypes: one male and one female) of Neoribates (Neoribates) paramacrosacculatus sp. n. are from eastern Nepal, 27°19'N, 87°78'E, 2770 m a.s.l., Panchthar District, upper course of Mai Majuwa river, pasture Dhorpar Kharka, soil in mixed broadleaved forest, soil, 27-28.VIII.1983, collected by J. Martens & B. Daams.

Type deposition.

The holotype and one paratype are deposited in the collection of the Senckenberg Institution Frankfurt, Germany; one paratype is 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) macrosacculatus Aoki, 1966.

Remarks.

Neoribates (Neoribates) paramacrosacculatus sp. n. is morphologically similar to Neoribates (Neoribates) macrosacculatus Aoki, 1966 from the eastern Palaearctic region in having the long openings of notogastral sacculi. However, the new species differs from Neoribates (Neoribates) macrosacculatus by the larger body size (780-830 × 547-581 versus 630-760 × 430-480 in Neoribates (Neoribates) macrosacculatus ), foveolate body integument and striate anal figs (versus smooth in Neoribates (Neoribates) macrosacculatus ), bothridial setae of medium size, length of stalk not longer than head (versus long, stalk obviously longer than head in Neoribates (Neoribates) macrosacculatus ), presence of five pairs of genital setae (versus four pairs in Neoribates (Neoribates) macrosacculatus ) and absence of lamellar setae (versus present in Neoribates (Neoribates) macrosacculatus ) and presence of very short interlamellar setae (versus long in Neoribates (Neoribates) macrosacculatus ).