Pterostichus (Chinapterus) przewalskyi Tschitscherine , 1888

Dorjderem, Sodnomtsog, Shi, Hongliang & Liang, Hongbin, 2020, The genus Pterostichus in China III: a brief review of subgenus Chinapterus Berlov (Coleoptera, Carabidae) with descriptions of two new species, ZooKeys 953, pp. 61-83 : 61

publication ID	https://dx.doi.org/10.3897/zookeys.953.52282
publication LSID	lsid:zoobank.org:pub:3C362CD3-1D85-47DE-A703-AF44067AC929
persistent identifier	https://treatment.plazi.org/id/FFE05281-4ED0-5340-9306-289B8279B47B
treatment provided by	ZooKeys by Pensoft
scientific name	Pterostichus (Chinapterus) przewalskyi Tschitscherine , 1888
status

Treatment

Pterostichus (Chinapterus) przewalskyi Tschitscherine, 1888 View in CoL Habitus, Figs 24 View Figures 24–29 , 25 View Figures 24–29 ; male genitalia, Figs 30 View Figures 30–41 , 33 View Figures 30–41 , 42 View Figures 42–57 , 43 View Figures 42–57 , 44 View Figures 42–57 , 47-51 View Figures 42–57 ; female genitalia, Figs 59-61 View Figures 58–65

Pterostichus przewalskyi Tschitschérine 1888: 362 (syntypes in ZIN; type locality: Amdo); Jedlička, 1962: 289 (sg. Oreophilus ); Sciaky, 1996: 437 (sg. Sinoreophilus ).

Type locality.

From the original description, the type localities are "Amdo: près des rivières Tala-tchu et By-tchu, aux sources du Jangtsekiang". By-tchu refers to the Buqu River in Qumarlêb County of Qinhai Province, and Tala-tchu probably refers to the Derqu River in Chindu County, but the detailed locality was not labeled for any examined type so the precise type locality for the lectotype is unclear.

Type series.

Lectotype of Pterostichus przewalskyi Tschitschérine (designated herein), male (ZIN) [Figs 24 View Figures 24–29 , 30 View Figures 30–41 , 31 View Figures 30–41 , 47 View Figures 42–57 ], Amdo / Przewalskii m. Typ. Tschitscherin det / Zoological Institute Russian Academy of Sciences, St. Petersburg [yellow label]. Paralectotypes of Pterostichus przewalskyi Tschitschérine, 1 male (ZIN), N. E. Thibet, 1884, Przewalsky / Przewalskii m. typ. Tschitscherin det / Zoological Institute, Russian Academy of Sciences, St. Petersburg [yellow label]. 1 female (NMPC), N.E. Thibet, 1884, Przewalsky. / przewalskii m., typ., Tschitscherin det / Type [red label] / przewalskii, typ., Tsch., Det. Tschitscherin [pink label].

Non-type material.

1 female (IZAS), China, N Sichuan prov., Hongyuan, ca. 4200 m, 21.7-3.8.1991, J. Kalab leg. 1 male (IZAS) [Figs 42 View Figures 42–57 , 51 View Figures 42–57 ], Ch-NW Sichuan, ± 3700 m, 32.59N, 98.06E, 3+15/7, SERXÜ env. 1995, alpine meadow, Jaroslav Turna leg. 1 female (IZAS), Qinghai, Baima county, Makehe, Meilanggou, 2013.VI.28, D 3500 m, Chen Jin leg. 2 males (IZAS) [Figs 25 View Figures 24–29 , 44 View Figures 42–57 , 50 View Figures 42–57 ], Sichuan, Zoigê county, 8km W. of Hongxing, wetland, 3236 m, 34.1236N, 102.6545E, under rock, 2016.VII.25, Shi HL lgt. 3 males and 1 female (IZAS) [Figs 32 View Figures 30–41 , 33 View Figures 30–41 , 49 View Figures 42–57 ], Qinghai, Jigzhi county, E. of Luanshitou pass; alpine meadow; 4091 m; 33.4008N, 101.2537E; 2017.VIII.2, pitfall trap, SHI HL, LU ZB, ZHU PZ & YAN WF leg. 1 male (IZAS) [Figs 43 View Figures 42–57 , 48 View Figures 42–57 ], Qinghai, Jigzhi county, Luanshitou pass; alpine meadow; 4212 m; 33.3986N, 101.2432E; 2017.VIII.2, under stone, SHI HL, LU ZB, ZHU PZ & YAN WF leg. 8 females (IZAS) [Figs 59-61 View Figures 58–65 ], Qinghai, Chidu county, 2 km S of Zhenqin; alpine wetland, 4329 m, 33.3908N, 97.2977E, 2017.VII.27, under stone, SHI HL, LU ZB, ZHU PZ & YAN WF leg.

Diagnosis.

Femora reddish brown. Pronotum cordate; lateral margins strongly sinuate before basal angles; basal angles right-angled, clearly pointed outwards. Elytral basal fovea depressed between inner and outer grooves; basal pore present; third interval often with two setigerous pores. Fifth tarsomere glabrous ventrally; right paramere strongly elongate and bent, apex rounded, not declined to dorsum.

Description.

BL 12.0-13.4 mm, BW 4.8-5.6 mm. Robust, black, femora reddish brown except black apex; elytra slightly shiny. Head large, frons smooth or very sparsely punctate; genae short, less than one-third length of eyes; eyes prominent. Pronotum cordate; widest slightly before middle, PW/PL = 1.33-1.41; lateral margins largely rounded before the middle, strongly sinuate before basal angles; one mid-lateral seta present at apical third; basal margin slightly wider than apical margin, PBW/PAW = 1.02-1.12; basal angles rectangular, clearly protruding outwards; basal foveae deep, inner and outer grooves faintly defined, inner groove straight, distant from basal margin, outer groove shorter than inner one, extending to basal margin; basal fovea depressed between inner and outer grooves, coarsely punctate in basal fovea; area between outer groove and lateral margin hardly convex; disc convex, smooth, slightly transversely rugose; apical angle rounded, not protruding. Elytra oblong, EL/EW = 1.42-1.45; basal ridge slightly oblique; shoulder rounded, basal ridge and lateral margin forming an obtuse angle, humeral tooth small and obtuse; apical plica indistinct; basal setigerous pores present; scutellar striae complete; intervals slightly convex; microsculpture similar in both sexes, finely isodiametric; third interval usually with two setigerous pores, at basal two-fifths and two-thirds respectively, occasionally with one or three pores on one elytron, all adjacent to second stria; ninth interval with umbilical series regularly arranged, slightly sparser in the middle; striae deep, indistinctly punctate. Fifth tarsomere glabrous ventrally; meso- and metatarsomere I and II with outer groove. Terminal ventrite shallowly depressed and finely rugose in males. Male genitalia. Ventral margin of median lobe nearly straight at middle, gradually bent downwards near apex; apical orifice opening left-dorsally; apical lamella small, rounded triangular, length sub-equal to basal width, apex rounded (Figs 30 View Figures 30–41 , 31 View Figures 30–41 ); apical lamella slightly twisted, forming a continuously curved dorsal-left surface (Figs 42-44 View Figures 42–57 ). Right paramere strongly elongate and curved, the obtuse angle between basal portion and apical portion 100-105°; apex slightly thick, well rounded, not or weakly bent to dorsum (Figs 47-51 View Figures 42–57 ). Endophallus bent to the ventral side of aedeagus, major portion of endophallus located at ventral side of median lobe apex; gp opened to basal-dorsum; gpl large and coniform; gpp large and cap-like, on the ventral side of gp; two groups of lobes recognized: rl on ventral-right surface of endophallus, large, rounded or apex a little pointed; lbl on ventral-left surface of endophallus, divided into two clearly separated sub-lobes, the basal one large and nearly rounded, the apical one much smaller than the basal one; lal absent (Figs 32 View Figures 30–41 , 33 View Figures 30–41 ). Female genitalia. Gonocoxite II of ovipositor slightly slender, length ca. 2.5 times maximum width; inner and outer margins near straight, each with one ensiform setae before middle, apex narrowly rounded, with two very short nematiform setae in a groove (Figs 60 View Figures 58–65 , 61 View Figures 58–65 ). Spermatheca moderately long and tube-like, length ca. 15 times maximum width (Fig. 59 View Figures 58–65 ).

Distribution.

Qinghai (southeast part), Sichuan (northwest part). Probably also in southwest Gansu (Map 2 View Map 2 ).

Habitat.

This hygrophilous species tends to live in wet habitats such as wetlands or the banks of seasonal streams on alpine meadows.

Remarks.

This species was described based on an unspecified number of specimens from "Amdo: près des rivières Tala-tchu et By-tchu" collected by Przewalsky in 1884. In the collection of ZIN, we examined two males which matched with the original literature. We designated the male with its genitalia dissected as the lectotype herein, for the taxonomic purpose of fixing the species name to a single specimen and preventing further confusion.

Sciaky (1996) assigned this species to the subgenus Sinoreophilus due to external similarities but this species has its right paramere strongly elongated and the elytral microsculpture is similar in both sexes, supporting a close relationship to P. singularis . So, we herein moved it from the subgenus Sinoreophilus to the subgenus Chinapterus .