Bryelmis, Barr, 2011

Barr, Cheryl B., 2011, BryelmisBarr (Coleoptera: Elmidae: Elminae), a New Genus of Riffle Beetle with Three New Species from the Pacific Northwest, U. S. A., The Coleopterists Bulletin 65 (3), pp. 197-212 : 197-212

KEY TO THE SPECIES OF BRYELMIS

1. Pronotal median longitudinal carina prominent; pronotal sublateral carinae explanate and ridge-like, bordered by deep antero-medial depressions; pronotum distinctly wider than long ( Figs. 3, 4). Idaho ( Fig. 10) ................... .................................................... B. idahoensis

1′. Pronotal median longitudinal carina not as prominent, may be distinct or indistinct; pronotal sublateral carinae bordered by indistinct or shallow antero-medial depressions; pronotum about as wide as long ( Figs. 8, 9)......2

2. Male genitalia with tips of parameres flared to produce an obtuse angle ( Fig. 7); pronotal median longitudinal carina distinct to base; elytra moderately to deeply striate with large punctures, sublateral carinae prominent ( Fig. 8). Washington to Oregon ( Fig. 10)..... B. rivularis

2′. Male genitalia with tips of parameres narrowly rounded, not obtusely angled ( Fig. 6); pronotal median longitudinal carina low, often indistinct, more visible anteriorly; elytra lightly to moderately striate and punctate, sublateral carinae not prominent ( Fig. 9). Oregon to northern California ( Fig. 10)....... ....................................................... B. siskiyou