Careproctus microstomus Stein, 1978 .

Smallmouth Snailfish. To 19.7 cm (7.8 in) SL (Stein 1978). Oregon (Stein 1978) to central California ( Ambrose in Moser 1996). Depth: 2,721–4,100 m (8,927–13,451 ft) (min.: Stein 1978; max.: Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California). A NWFSC-FRAM database record of 1,229 m (4,031 ft) would need a voucher specimen to be accepted (Jay Orr).