PaleoDB taxon number: 269370
Full reference: S. E. Lewis and R. W. Gundersen. 1987. A new species of fossil Coleoptera (Dytiscidae) from the Oviatt Creek fossil locality (Miocene) of the Clearwater National Forest of northern Idaho. Occasional Papers in Paleobiology St Cloud State University 1:1-9
Type specimen: UINM T-1005, an elytra. Its type locality is Oviatt Creek Site (P-35), which is in a Langhian lacustrine - small claystone in the Latah Formation of Idaho.
Average measurements (in mm): body 30.0 x 15.0, elytron 22.5 x 8.0