Calathus (Acalathus), Semenov, 1889

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 727

Subgenus Acalathus Semenov, 1889

Acalathus Semenov, 1889a: 365. Type species: Acalathus semirufescens Semenov, 1889 by monotypy. Etymology. Probably from the Greek prefix a - (with, sameness) and the generic name Calathus [q.v.], possibly alluding to the similarity of the adults with those of Calathus [masculine]. Note. This taxon was also described as new by Semenov (1889b: 691).

Procalathus Jedlička, 1953: 106. Type species: Calathus fallax Semenov, 1889 by original designation. Synonymy established by Lindroth (1966: 547). Etymology. From the Latin pro - (before, in front of) and the generic name Calathus [q.v.] [masculine].

Diversity.

Eleven species in North America (one species) and the Chinese provinces of Kansu, Szechwan, and Tsinghai, and the Autonomous Region of Tibet (ten species).

Taxonomic Note.

This taxon has been listed as a distinct genus in the subtribe Dolichina by Hovorka and Sciaky (2003: 529). However, Ruiz et al. (2009) concluded from molecular sequence analyses that the taxon is closely related to Calathus and should be ranked as a subgenus of Calathus .