Contribution to the Knowledge of the Rakantrechus Complex (Coleoptera, Carabidae, Trechini), with Description of a New Subgenus and a New Species of the Genus Nipponaphaenops S. Uéno, 1971 from Northwestern Shikoku, Western Japan

Abstract

A group of eyeless trechini ground beetles’ genera distributed in western Japan, the Rakantrechus Complex, is reviewed, and a key to this Complex and a key to its component genera are provided. A new species of the genus Nipponaphaenops S. Uéno, 1971, N. kojii sp. nov. is described under the new subgenus Tanakaphaenops subgen. nov. Additionally, new taxonomic treatment Rakantrechus (Iyotrechus) hisamatsui (S. Uéno et Naitô, 2009) comb. nov. is proposed. Keys to the subgenera of Rakantrechus and Nipponaphaenops are provided. Revised definition of the genus Nipponaphaenops is proposed.