Osteodiscus cascadiae Stein, 1978 .

Bonydisk Snailfish. To 8.5 cm (2.6 in) SL (Stein 1978). British Columbia (Stein 1978, Orr et al. 2019a) to Monterey Bay, central California (Stein et al. 2006). Depth: 1,348 –3,500 m (4,421 –11,480 ft) (Stein et al. 2006).