Limnaeoperyphus, Nakane, 1963

Makarov, Kirill V. & Sundukov, Yurii N., 2024, A revision of the subgenus Limnaeoperyphus Nakane, 1963 (Coleoptera: Carabidae, Bembidion), with the description of a new species, Zootaxa 5493 (4), pp. 345-370 : 365

Key to the species of the subgenus Limnaeoperyphus

1. Larger (TL 3.80–4.68 mm, M 4.27 mm); elytra 1.53 (1.41–1.61) times wider than pronotum. Discal pores of elytra smaller and usually not pitted. Elytra with a distinct bluish or bluish-greenish tint; trochanters, femora and tarsomeres partially blackened, most of hind coxae black; 2 nd antennomere always light, reddish. Spermatheca large, elongate; flagellum of endophallus longer.................................................................... Bembidion petromarinum sp. nov.

- Smaller (TL 3.40–4.45 mm, M 3.85 mm); elytra 1.45 (1.38–1.53) times wider than pronotum. Discal pores of elytra larger, usually pitted; pits often occupying 4 th interval on one or both elytra. Elytra brown or dull copper, rarely bluish greenish; legs completely, including trochanters, pale brown or yellowish brown; on antennae (in fully coloured individuals) only 1 st antennomere light, the rest partially blackened or darkened. Spermatheca small, short; flagellum of endophallus shorter.................................................................................. Bembidion quadriimpressum