Sternoppia (Sternoppia) chinchaoensis, Ermilov & Subías & Shtanchaeva & Friedrich, 2022

Ermilov, Sergey G., Subías, Luis S., Shtanchaeva, Umukusum Ya. & Friedrich, Stefan, 2022, A new subgenus and three new species of Sternoppia (Acari, Oribatida, Sternoppiidae) from Peru, Zootaxa 5195 (4), pp. 373-384 : 378-379

Sternoppia (Sternoppia) chinchaoensis sp. nov.

( Fig. 3 )

Diagnosis. Body length: 300–360. Rostral, lamellar and interlamellar setae setiform, barbed; bothridial seta, with developed head bearing three or four simple cilia. All notogastral setae setiform, smooth; lm extremely long, others short; lm located anteromedially to la. Length of overlapping epimeral plates shorter than length of genital plate. Epimeral and anogenital setae setiform, sparsely ciliated (except 3a densely ciliated); insertions of 3a distant from each other.

Description of adult. Measurements. Body length: 360 (holotype: male), 300–360 (10 paratypes: six males and four females); notogaster width: 195 (holotype), 180–195 (10 paratypes). No difference between males and females in body size.

Integument. Body color brown. Body surface mostly finely granulate (visible under high magnification); lateral side of body between bothridium and acetabula I–II densely tuberculate (diameter of tubercle up to 2).

Prodorsum. Costula and postcostular tubercle well developed. Rostrum rounded. Rostral (30–34), lamellar (49–57) and interlamellar (57–67) setae setiform, barbed; exobothridial seta (30–34) setiform, roughened; bothridial seta (86–90) with fusiform head bearing three or four simple cilia unilaterally. Postbothridial tubercle slightly developed.

Notogaster. Humeral tubercle slightly developed, sometimes concave. Ten pairs of notogastral setae (c: 26–30; la, lp, h 2, p 1 – p 3: 22–30; lm: 90–94; h 1, h 3: 11–19) present; all setiform, smooth; lm located anteromedially to la. Lyrifissures ia, im, ip and opisthonotal gland opening slightly visible, ih and ips not observed.

Gnathosoma . Similar to S. (A.) tetratuberculata , except sizes. Subcapitulum: 90–94 × 49–56; a: 15–19; m: 34–37; h: 41–45; palp: 52–56; postpalpal seta: 7; chelicera: 82–86; cha: 22; chb: 15.

Epimeral and lateral podosomal regions. Anterior part of epimeral plates overlapping, forming small tectum; length of overlapping plates shorter than length of genital plate. Medial tubercle on epimere I developed; lateral tubercle absent. Seta 3a (41–45) densely ciliated; other setae (1a, 2a: 34–45; 1b, 4b: 52–56; 1c: 64–71; 3b, 3c, 4a, 4c: 56–67) setiform, sparsely ciliated; insertion of 1c distant from anterior margin of pedotectum I; insertions of 3a distant from each other. Discidium subtriangular.

Anogenital region. Genital (g 1, g 4: 41–49; g 2, g 3: 26–30; g 5, g 6: 19–22), aggenital (45–52), anal (22–30), and adanal (37–45) setae setiform, sparsely ciliated. Adanal lyrifissure close and parallel to anal plate.

Legs. Identical to S. (A.) tetratuberculata .

Type material. Holotype (male) and 10 paratypes (six males and four females): South America, Central Peru, Andes , 09°42'58''S, 75°05'33''W, Huánuco Department , Huánuco Province, Chinchao District , NW Tunel de Carpish , 2770 m a.s.l., upper soil and leaf litter in primary mountain forest, Winkler extraction, 14.IV.2016 (S. Friedrich, F. Wachtel and D. Hauth).

The holotype is deposited in the Museo de Historia Natural , Universidad Nacional Mayor de San Marcos, Lima, Peru ; 10 paratypes are deposited in the Tyumen State University Museum of Zoology , Tyumen, Russia .

Remarks. Sternoppia chinchaoensis sp. nov. is similar to S. quadriseta (Balogh & Mahunka, 1969) (see Balogh & Mahunka 1969b) in having fusiform bothridial seta bearing simple cilia and extremely long notogastral seta lm. However, the new species can be distinguished from the latter by short (versus extremely long) notogastral seta lp, medium-sized (versus very long) interlamellar seta, and the localization of epimeral setae 3a (their insertions distant from each other versus close to each other).

Etymology. The species name refers to the place of origin, Chinchao District.

Figures

FIGURE 3. Sternoppia (Sternoppia) chinchaoensis sp. nov., adult: A—dorsal view (legs not shown); B—ventral view (gnathosoma and legs not shown). Scale bar 50 μm.