Dorsal view of Trephionus species: 2 T. kinoshitai, male from Mt. Shirouma 3 T. cylindriphallus sp. n., holotype male 4 T. niumontanus sp. n., holotype male 5 T. babai, male from Mt. Ishikiri 6 T. shibataianus, male from Mt. Naka 7 T. inexpectatus sp. n., holotype male 8 T. abiba sp. n., holotype male 9 T. bifidilobatus sp. n., holotype male.
Part of: Sasakawa K, Itô H (2018) Taxonomic notes on the ground beetles in the genus Trephionus Bates, 1883 from central Honshu, Japan (Coleoptera, Carabidae, Sphodrini, Synuchina). ZooKeys 742: 91-104. https://doi.org/10.3897/zookeys.742.23752