Oribotritia duotrisetosa Niedbała, 2013

Niedbała, Wojciech & Ermilov, Sergey G., 2013, New and little known ptyctimous mites (Acari, Oribatida) from India, Zootaxa 3731 (4), pp. 577-588 : 580

Oribotritia duotrisetosa Niedbała sp. nov.

( Fig. 2 A–D )

Measurements of holotype. Large species. Prodorsum: length 505, width 439, height 177. Prodorsal setae: sensillum 139, interlamellar 101, lamellar 76, rostral 94, exobothridial 114. Notogaster : length 990, width 777, height 727. Notogastral setae: c 1 190, h 1 and p 1 131, c 1 / c 1 – d 1 =0.9. Genital and aggenital plates 217 × 126; anal and adanal plates 470 × 96.

Integument. Colour deep brown. Body surface dotted.

Prodorsum with two lateral carinae, upper longer and stronger than lower. Sensilla and setae needle-form, flagellate, exobothridial setae the longest.

Notogaster with feeble, needle-form, flagellate setae, c 1 / c 1 – d 1 =0.9. Setae of row c remote from anterior border.

Ventral region. Nine pairs of genital setae on left side and eight pairs of setae on right side; two pairs of aggenital setae similar in length. Anal plates with three pairs of minute setae, distance between setae an 3 and an 2 considerably shorter than between an 2 and an 1; adanal plates with three pairs of minute setae, distance between ad 3 and ad 2 slightly shorter than between ad 2 and ad 1; anterior anal setae an 3 and an 2 situated anteriorly of ad 3 setae; lyrifissures iad not visible.

Material examined. Holotype: In-1.

Comparison to related species. The new species is one of uncommon species with three pairs of anal and three pairs of adanal setae, where two anterior anal setae an 3 and an 2 are situated anteriorly of ad 3 setae. We know only three such species: Oribotritia megale (Walker, 1965) from Nearctic Region and O. ampla Niedbała, 1991 and O. samoaensis Niedbała, 1998 from Pacific islands. Distinctive features of O. megale has very long interlamellar setae, rigid sensilla, different arrangement of genital setae and presence of three pairs of aggenital setae; those of O. ampla are one pair of lateral carinae of prodorsum and setae ag 2 longer than ag 1; O. samoaensis has one pair of lateral carinae of prodorsum, minute notogastral setae and longer aggenital setae. Also, the new species is similar to O. alajuela Niedbała, 2003 which always has two pairs of anal setae.

Etymology. The prefix duo is Latin meaning “two” and refers to both anal and adanal plates being “trisetosus”.

Figures

FIGURE 2A–D. Oribotritia duotrisetosa Niedbała sp. nov.: A, prodorsum, lateral view; B, prodorsum, dorsal view; C, lateral view of opisthosoma; D, lateral view of right side of ventral region.