Pterostichus (Circinatus) dentifer Allegro & Sciaky, 2010

Shi, Hongliang & Liang, Hongbin, 2015, The genus Pterostichus in China II: the subgenus Circinatus Sciaky, a species revision and phylogeny (Carabidae, Pterostichini), ZooKeys 536, pp. 1-92 : 35-36

Taxon classification Animalia Coleoptera Carabidae

Pterostichus (Circinatus) dentifer Allegro & Sciaky, 2010 Figures 22, 33, 107

Pterostichus (Circinatus) dentifer Allegro and Sciaky 2010: 4 (Original: Pterostichus (Circinatus) ; holotype deposited in CRS).

Type locality.

Sichuan: Dayi County, Chadiping, 1500 m. Chadiping (N30.61°, E103.17°) is a small village under the south slope of Xilingxueshan Mt.

Type material examined.

Holotype of Pterostichus dentifer Allegro & Sciaky (CRS): male, body length = 14.5 mm, board mounted, genitalia dissected and mounted on plastic film, pinned under specimen, "China, C Sichuan, Dayi distr., / Chadiping env., 1500 m / 5-7.08.1996 / A. Zamotajlov, A. Miroshnikov & / D. Fedorenko"; " ex coll. / A. Zamotajlov"; "HOLOTYPUS ♂ / Pterostichus / ( Circinatus )/ dentifer sp. n. / Allegro & Sciaky det. 2010" [red label].

Diagnosis.

Pronotum with single mid-lateral seta; posterior seta distant from hind angle, hind angle completely rounded; basal foveal grooves not completely fused, anterior part of outer groove distinctly separated from inner one, so that basal fovea is a little bifid anteriorly; elytron with faint transverse microsculpture; basal ridge strongly oblique lateral-posteriorly; shoulder angle forming obtuse angle, humeral tooth large, strongly pointed; males with terminal sternum not modified; median lobe of aedeagus strongly bent to right side, apical lamella very short, less than one fourth its basal width.

Pterostichus dentifer is very similar to Pterostichus subtilissimus and Pterostichus yuxiaodongi sp. n. They are all relatively large sized species within the subgenus, and have the aedeagus strongly bent to the right side. Pterostichus dentifer differs from the latter two species in: (1) elytral humeral tooth much larger; (2) pronotal basal fovea with more punctures; (3) median lobe of aedeagus with shorter apical lamella (than Pterostichus yuxiaodongi ), and relatively simpler apex (than Pterostichus subtilissimus ).

Supplemental description.

Male sternum. Penultimate and terminal sterna of males without special structures. Endophallus not studied, females unknown.

Distribution.

So far this species is known only from the holotype from Sichuan Prov., Dayi County, Chadiping, 1500 m. (Map 2)

Affinities.

This species is close to Pterostichus subtilissimus and Pterostichus yuxiaodongi sp. n. For details see discussions under Pterostichus yuxiaodongi sp. n. and subtilissimus -group in the section of infra-subgeneric taxonomy.