STYGOPORUS-OREGONENSIS, A NEW GENUS AND SPECIES OF SUBTERRANEAN WATER BEETLE (COLEOPTERA, DYTISCIDAE, HYDROPORINI) FROM THE UNITED-STATES

Stygoporus oregonensis, a new genus and species of subterranean hydroporine water beetle (Dytiscidae), is described from a shallow well in Oregon, U.S.A. The beetles are characterized by small size, depigmented body, lack of eyes, reduced wings and lack of natatorial setae on the hind legs. The proposed sister genus is Sanfilippodytes Franciscolo. Taxonomically important characters are illustrated and collecting and habitat notes provided.