osculus, Arius Jordan [D. S.] & Gilbert [C. H.] 1883:46 [Bulletin of the U. S. Fish Commission v. 2 (for 1882); ref. 2475] Panama (Pacific). Holotype (unique): USNM 29476 (missing since 1980). Type catalog: Ferraris & Vari 1992:7 [ref. 19771], Ferraris 2007:50 [ref. 29155]. •Valid as Arius osculus Jordan & Gilbert 1883 -- (Burgess 1989:169 [ref. 12860] as oscula, Allen & Robertson 1994:68 [ref. 22193], Bussing & López S. 1994:62 [ref. 23101], Kailola & Bussing in Fischer et al. 1995:871 [ref. 22829], Acero P. & Betancur-R. 2002:134 [ref. 26190]). •Valid as Hexanematichthys osculus (Jordan & Gilbert 1882) -- (Marceniuk & Ferraris in Reis et al. 2003:451 [ref. 27061]). •Status uncertain -- (Betancur-R. & Acero P. 2004:15 [ref. 28008]). •Questionably valid as Aspistor osculus (Jordan & Gilbert 1883) -- (Acero P. & Betancur-R. 2002). •Valid as Notarius osculus (Jordan & Gilbert 1883) -- (Marceniuk & Menezes 2007:84 [ref. 29031], Ferraris 2007:50 [ref. 29155], Marceniuk et al. 2023:15 [ref. 40422]). Current status: Valid as Notarius osculus (Jordan & Gilbert 1883). Ariidae: Ariinae. Distribution: Central America: Pacific coast of Costa Rica and Panama. Habitat: brackish, marine.