Prognatholiparis ptychomandibularis Orr & Busby, 2001 .

Wrinklejaw Snailfish. Length to 9.8 cm (3.9 in) SL (Personal communication: University of Washington, Burke Museum of Natural History and Culture Fish Collection, Seattle, Washington). Known from three specimens taken in and around Seguam Pass, central Aleutian Islands, Alaska (Orr and Busby 2001, Maslenikov et al. 2013). Depth: 448–455 m (1,469 –1,493 ft) (min.: Maslenikov et al. 2013; max.: Mecklenburg et al. 2002).