longipinnis, Leptocerdale Weymouth [F. W.] 1910:142, Figs. 1-2 [Proceedings of the United States National Museum v. 38 (no. 1734); ref. 4632] Cameron, Louisiana, U.S.A. Holotype: USNM 64157. Paratypes: CAS-SU 21391 (10), USNM 64158 (1). Type catalog: Böhlke 1953:100 [ref. 12291]. •Valid as Microdesmus longipinnis (Weymouth 1910) -- (Robins & Ray 1986:255 [ref. 23100], Dawson 1990:960 [ref. 17542], Boschung 1992:166 [ref. 23239], Castro-Aguirre et al. 1999:454 [ref. 24550], Smith-Vaniz et al. 1999:320 [ref. 25013], Schwartz 1999:289 [ref. 25307], Smith & Thacker 2000:1007 [ref. 25199], Amaya et al. 2002:33 [ref. 26089], Thacker 2003:1798 [ref. 27112], Moura & Menezes in Menezes et al. 2003:100 [ref. 27192], Smith et al. 2003:66 [ref. 27621], Ross & Rhode 2004:316 [ref. 27789], Nelson et al. 2004:174 [ref. 27807], McEachran & Fechhelm 2005:734 [ref. 28815], Van Tassell 2011:146 [ref. 31732], Page et al. 2013:179 [ref. 32708], Thacker in Carpenter & De Angelis 2016:2845 [ref. 34618], Carvalho-Filho 2023:243 [ref. 40480], Gurgel-Lourenço et al. 2024:2 [ref. 40819]). Current status: Valid as Microdesmus longipinnis (Weymouth 1910). Microdesmidae: Microdesminae. Distribution: Western Atlantic: North Carolina (U.S.A.) south to Espírito Santo (Brazil), including Gulf of Mexico and Caribbean Sea; one specimen from Senegal (eastern Atlantic). Habitat: marine.