ptychomandibularis, Prognatholiparis Orr [J. W.] & Busby [M. S.] 2001:52, Figs. 1, 3-6 [Proceedings of the Biological Society of Washington v. 114 (no. 1); ref. 25205] Seguam Pass, east of Seguam Island, Aleutian Islands, 52.31836°N, 172.7453°W, depth 455 meters. Holotype (unique): UW 042431. •Valid as Prognatholiparis ptychomandibularis Orr & Busby 2001 -- (Mecklenburg et al. 2002:603 [ref. 25968], Chernova et al. 2004:46 [ref. 27592], Love et al. 2005:107 [ref. 37547], Maslenikov et al. 2013:16 [ref. 37947], Orr et al. 2019:22 [ref. 38839], Love et al. 2021:143 [ref. 39279], Kai et al. 2024:115 [ref. 40996], Page et al. 2023:192 [ref. 40505]). Current status: Valid as Prognatholiparis ptychomandibularis Orr & Busby 2001. Liparidae. Distribution: Northern Pacific: Aleutian Islands (U.S.A.). Habitat: marine.