Dytiscidae Leach, 1815
Laccornis coniodeus (Le Conte)
Laccornis conoideus (LeConte, 1850)
Laccornis deltoides (Fall, 1923)
Laccornis difformis (LeConte, 1855)
Laccornis etnieri Wolfe & Spangler, 1985
Laccornis kocae (Ganglbauer, 1904)
Laccornis latens (Fall, 1937)
Laccornis nemorosus Wolfe & Roughley, 1990
Laccornis oblongus (Stephens, 1835)
Laccornis pacifica Leech
Laccornis pacificus Leech, 1940
Laccornis schusteri Wolfe & Spangler, 1985
