Abstract
Nebria (Sadonebria) tenuicaulis sp. nov., a sympatric species with N. (S.) sadona ohdaiensis Nakane, is described from Japan. Phylogenetic analysis of the subgenus Sadonebria Ledoux & Roux based on morphological characters of adult beetles is undertaken. The results indicate phylogenetic utility of endophallic structures of this group and provide the relationships of six taxa as (((((N. sadona leechi Bates, N. saeviens Bates), N. tenuicaulis sp. nov.), N. sadona ohdaiensis Nakane), N. niitakana Kanô), N. chinensis Bates).References
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