Sasakawa K. 2022. A new species of the East Asian endemic subgenus Sadonebria Ledoux et Roux (Coleoptera: Carabidae: Nebria) ground beetles from Japan // Russian Entomol. J. Vol.31. No.1: 10–14 [in English].

Laboratory of Zoology, Department of Science Education, Faculty of Education, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba, 263-8522 Japan. E-mail:

doi: 10.15298/rusentj.31.1.02

ABSTRACT. Ground beetles in the East Asian endemic subgenus Sadonebria (Coleoptera: Carabidae: Nebria) show marked differentiation in the Japanese Archipelago, but their diversity has not been fully elucidated. Based on specimens from localities in western Chubu district, Honshu, Japan, Nebria hakusana Sasakawa, sp.n. is described. Comparison of male genital structures with the known consubgeners, and previously reported morphological and molecular phylogenies of this subgenus, suggest that N. hakusana Sasakawa, sp.n. is the most ancestral of the known Japanese endemic Sadonebria.

KEY WORDS: biogeography, comparative morphology, cryptic species, endophallus, male genitalia, new species, phylogeny, taxonomy.

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