longicauda, Nansenia Kawaguchi [K.] & Butler [J. L.] 1984:10, Fig. 10 [Contributions in Science (Los Angeles) No. 352; ref. 17434] North Pacific, 30°37'N, 147°24'W, 1800 meters of wire out. Holotype: SIO 76-9. Paratypes: ISH 60-1966 (1); USNM 207530 (1), 215703 (1). Type catalog: Krefft 1987:75 [ref. 20751]. •Valid as Nansenia longicauda Kawaguchi & Butler 1984 -- (Merella et al. 1997:213 [ref. 23098], Carter & Hartel 2003:868 [ref. 27000], Moore et al. 2003:177 [ref. 27076], Mundy 2005:157 [ref. 28379], Poulsen 2015:525 [ref. 33965], Hartel & Orrell 2016:1755 [ref. 34565], Carneiro et al. 2019:83 [ref. 37250], Sutton et al. 2020:36 [ref. 37832], Page et al. 2023:81 [ref. 40505]). Current status: Valid as Nansenia longicauda Kawaguchi & Butler 1984. Microstomatidae. Distribution: North Atlantic; northwestern Pacific and central Pacific. Habitat: marine.