Bembidion (Hydriomicrus), Casey, 1918

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 350-351

Subgenus Hydriomicrus Casey, 1918

Hydriomicrus Casey, 1918: 87. Type species: Leja semistriata Haldeman, 1843 designated by Lindroth (1963b: 305). Etymology. From the Greek hydrias (from water) and micros (small, little), possibly alluding to the small size of the adult and the habitat requirement of the species [masculine].

Diversity.

Five North American species, two in the east and three in the west.

Identification.

Lindroth’s (1963b: 212-229) key to Bembidion included all but one species ( Bembidion innocuum ); the two species found in Canada were treated in detail (Lindroth 1963b: 306).

Taxonomic Note.

Based on molecular data analyses, Maddison (2012: 568) concluded that this subgenus is closely related to Hirmoplataphus .