Pterostichus (Feroperis) rasilis Park & Kwon, 1996

Sun, Xiaojie, Shi, Hongliang, Sang, Weiguo & Axmacher, Jan Christoph, 2018, Two new species of Feroperis Lafer (Carabidae, Pterostichus) from China, with a key to all known Chinese species in this subgenus, ZooKeys 799, pp. 95-114 : 95

Pterostichus (Feroperis) rasilis Park & Kwon, 1996 Fig. 14C

Pterostichus (Feroperis) rasilis Park & Kwon, 1996: 3 (holotype in Systematic Entomology Laboratory, Department of Agricultural Biology, Kyungpook National University, Republic of Korea; type locality: northern slopes of Changbai Mountain, Jilin, China); Lafer 2011: 434.

Type locality.

Northern slopes of Changbai Mountain, Jilin, China.

Material examined.

46 specimens (IZAS),"China, Jilin, Changbaishan Nature Reserve; 2011.VII.14, 42°3'15"N, 128°4'2"E - 42°10'47"N, 128°8'15"E, 870-2000 m, Zou Yi"; 83 specimens (IZAS),"China, Jilin, Changbaishan Nature Reserve; 2011.VII.27, 42°3'15"N, 128°4'2"E - 42°7'16"N, 128°6'27"E, 1330-2000 m, Zou Yi"; 39 specimens (IZAS),"China, Jilin, Changbaishan Nature Reserve; 2011.VIII.08, 42°3'15"N, 128°4'2"E - 42°7'15"N, 128°6'26"E, 1330-2000 m, Zou Yi"; 30 specimens (IZAS),"China, Jilin, Changbaishan Nature Reserve; 2012.VII.14, 42°3'15"N, 128°4'2"E - 42°5'41"N, 128°4'3"E, 1520-2000 m, Zou Yi"; 94 specimens (IZAS),"China, Jilin, Changbaishan Nature Reserve; 2012.VII.12, 42°3'15"N, 128°4'2"E - 42°7'9"N, 128°6'17"E, 1350-2000 m, Zou Yi"; 62 specimens (IZAS),"China, Jilin, Changbaishan Nature Reserve; 2012.VII.30, 42°3'15"N, 128°4'2"E - 42°7'9"N, 128°6'17"E, 1330-2000 m, Zou Yi".

Diagnosis.

Body length 13-15 mm, blackish, elytra shiny without metallic lustre. Pronotum subcordate, widest at approximately anterior 1/3; lateral margins of pronotum strongly constricted to the base; posterior angles strongly protruding and forming very prominent denticles, lateral border at the posterior denticles strongly widened, at least twice as wide as the lateral broder of the pronotum anterior to the posterior angles; lateral border interrupted before posterior denticles; basal foveae rugose. Elytra with faint humeral teeth; the third interval usually with 3 or 4 setigerous pores close to the second stria, but position variable. Apical lamella of aedeagus elongate, apex slightly widened at both left and right margins in dorsal view; not thickened or bent downwards in lateral view. Right paramere long and bent, gradually narrowed to apex, apex pointed.

This species can be distinguished from most species of the subgenus by: male genitalia with apical lamella of aedeagus rectangular, apex widened in dorsal view, but not thickened in lateral view, and pronotal posterior angles with strong denticles. From the above characters, this species is superficially similar to P. vladivostokensis Lafer. They can be distinguished by: in P. rasilis , the apical lamella of aedeagus shorter, length approximate 1.2 times as basal width, apex less widened, not capitate; while in P. vladivostokensis the apical lamella of aedeagus longer, length approximate 1.5 times as basal width, apex strongly widened, distinctly capitate.

Distribution.

This species is known only from the northern slopes of Changbai Mountain, Jilin province in China, and it is a locally abundant species. It is probably also distributed within the DPR Korea, on the eastern slopes of Paektusan (the Korean name of Changbai Mountain).

Remark.

This species was originally described based on 14 specimens from Paektusan, Hamgyeongbuk-do, DPR Korea. Lafer (2011) examined the type specimens and specified that the true type locality was on the northern slopes of the Changbai Mountain in the territory of China, based on a personal communication with Y.J. Kwon in 1994.