Przewalskia Semenov 1893
Creators: name: Chigray, Svetlana N.
name: Nabozhenko, Maxim V.
name: Chigray, Ivan A.
name: Abakumov, Evgeny V.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Tenebrionidae
Przewalskia

description: Genus Przewalskia Semenov, 1893
Figs 4A–B, 11A–D, 18, 23D, 24B, 26E, 28A–B
Przewalskia Semenov, 1893: 262, nota.
Przewalskia – Reitter 1893: 204, 249. — Semenov 1903a: 11, nota 4. — Semenov-Tjan-Shansky 1907: 177. — Gebien 1940: 3. — Ren & Yu 1999: 67–68, fig. 24. — Ren & Dong 2001: 296.
Type species
Platyope dilatata Reitter, 1887, by original designation.
Species included
Platyope dilatata (Reitter, 1887), P. lineata (Reitter, 1887), P. trinkleri Gebien, 1940.
Diagnosis
Body (Fig. 4A–B) from pale brown to dark brown, robust, elytra rounded (semispherical), sometimes slightly flattened dorsally, completely covered with recumbent, white or yellowish and brown setae, with longitudinally striped pattern on elytra. Body length 7–18 mm. Eyes small, circular, convex in dorsal view; surface behind eyes concealed by anterior margin of pronotum.
Pronotum almost square (width subequal to length) (Fig. 3A), with lateral margins straight or weakly emarginated basally. Anterolateral angles strongly projecting, acutely angulated (but rounded at apex), visibly raised above level of eyes. Disc of pronotum moderately convex, with rounded, deep depression in middle and two triangular, deep depressions at base, surface around depressions densely covered with very large semispherical tubercles with seta (Fig. 11A–B), with setae between them. Prosternum long, 1.8× as short as longitudinal diameter of one procoxa (Fig. 4B), without depression along anterior margin. Prosternal process narrower between middle level of coxae and strongly widened to apex (1.5 × as long as wide), not raised between procoxae and not protruding beyond procoxae.
Elytra semispherical (2 or more × as wide as pronotum), humeral rib weakly expressed, not strongly elevated, with row of sparse tubercles. Elytral pubescence has longitudinally striped pattern (from 3 in P. trinkleri to 7 in P. dilatata) of recumbent, yellowish setae (Fig. 4A) as a result of presence of denser or sparser setae (Fig. 11C–D). Przewalskia trinkleri has glabrous anterior half and striped apical and lateral parts of elytra. Each elytron with three (P. trinkleri) to 4–6 longitudinal rows of very small granules with long seta in denser pubescent (light) striae. Scutellar shield not hidden under base of pronotum, widened to apex; surface around scutellar shield without depression. Transverse length of one metacoxa subequal to intercoxal process of abdominal ventrite 1.
At least pro- and mesotrochanters with very long setae. Meso- and metafemora curved along elytral lateral vertical side. Protibiae widened from proximal to distal part, weakly curved outward, with strong, short spines (on outer margin) and very dense, long setae (Figs 26E, 28A–B); spines denser at apex. Mesotibiae curved outward, with smaller and sparser spines and dense pubescence on inner margin. Metatibiae straight, with small, sparse spines and dense pubescence at least in apical part. Protibial terminal spurs usually lanceolate (at least outer spur), large, widened and flattened, slightly curved inward, subequal in length, extending to base of protarsomere 3; meso- and metatibial terminal spurs different in length, narrowed from base to apex, mesotibial terminal spurs extending to base of mesotarsomere 2, the latter ones extending to apex of metatarsomere 1. Pro- and mesotarsi flattened from lateral sides, covered with long fine setae dorsally and shorter, stronger setae ventrally; metatarsi also flattened from lateral sides, with long setae dorsally and very short ones ventrally; setae form dense, flattened brushes. Tarsal claws elongate, narrow, weakly curved outward.
Male genitalia (Fig. 18A–H)
Inner sternite VIII (Fig. 18H) weakly, widely sclerotized, except for narrow, memranous median part in middle, densely covered with long setae (setae much longer and denser along posterior margin); posterior margin with deep V-shaped median emargination; gland absent (or at least, not observed). Spiculum gastrale (Fig. 18G) without common stem, with weakly sclerotized membrane, rods roundly connected; derivatives of inner sternite IX elongate-oval, evenly sclerotized, with long setae apically.
Tegmen of aedeagus (Fig. 18A–C) long, slender, with basal piece slightly shorter than apical one; apical piece bare, slightly curved, acutely angulate at apex ventral apophyses not expressed, dorsal apophyses long, merged in triangular plate; basal piece with narrowly rounded apex; median lobe with wide sclerotization in apical and basal parts and small membranous area in middle, base narrowly rounded, not bifurcate, apex acutely angulate (Fig. 18D–F).
Female genitalia
Spiculum ventrale (Fig. 18I) with long common stem, rods narrow, anterior margin of sternite VIII nearly straight, with long, dense setae, apophyses of sternite VIII short, narrow, narrowly rounded at apex.
Ovipositor (Fig. 18J–L) moderately sclerotized, elongate. Coxite with four distinct, not merged lobes. Baculi of coxite lobe I well expressed, but much shorter than paraproct baculi; lobe II short, transverse; lobe III elongate; lobe IV strongly sclerotized, transformed into curved spatulate structure. Paraproct elongate, with narrow, long baculi. Proctiger also elongate and with narrow baculi, anterior margin rounded. Vulva with pair of sclerotized ‘spicula’ in the middle on ventral side. Paraproct in base, coxite and proctiger with very dense and long pubescence.
Female genital ducts (Fig. 23D)
Vagina elongated, with longitudinal wrinkles and separated anterior part. Spermatheca as short single tube. Accessory gland long, sacciform, with one thick constriction at base.
Distribution
China (Qinghai, Xinjiang): Taklamakan Desert.
description: Published as part of Chigray, Svetlana N., Nabozhenko, Maxim V., Chigray, Ivan A. & Abakumov, Evgeny V., 2022, A revision of the Palaearctic Pimeliini (Coleoptera: Tenebrionidae): a comparative analysis and systematic position of Eastern European and Asian taxa with dorso-lateral eyes, pp. 1-71 in European Journal of Taxonomy 809 on pages 29-30, DOI: 10.5852/ejt.2022.809.1719, http://zenodo.org/record/6419425