brachycephalus, Syngnathus Poey [F.] 1868:444 [Repertorio Fisico-Natural de la Isla de Cuba v. 2; ref. 3505] Havana, Cuba. Lectotype: MCZ 11726. Paralectotypes: MCZ 54085 [ex MCZ11726] (1). Type catalog: Howell Rivero 1938:184 [ref. 22926] wrongly with a holotype and paratype. Lectotype selected by Dawson 1962:132 [ref. 6764]. •Valid as Cosmocampus brachycephalus (Poey 1868) -- (Dawson 1982:128 [ref. 6764], Robins & Ray 1986:125 [ref. 23100], Cervigón 1991:268 [ref. 24472], Smith-Vaniz et al. 1999:189 [ref. 25013], Schmitter-Soto et al. 2000:155 [ref. 27754], Fritzsche & Vincent 2003:1222 [ref. 27044], Smith et al. 2003:18 [ref. 27621], Nelson et al. 2004:111 [ref. 27807], McEachran & Fechhelm 2005:19 [ref. 28815], Kuiter 2009:236 [ref. 30404], Page et al. 2013:114 [ref. 32708], Smith-Vaniz & Jelks 2014:35 [ref. 33341], Hamilton et al. 2016:Supplement 1 [ref. 35615], Escobar-Sierra et al. 2021:75 [ref. 38844], Martínez-Servín et al. 2023:117 [ref. 40726], Page et al. 2023:118 [ref. 40505]). Current status: Valid as Cosmocampus brachycephalus (Poey 1868). Syngnathidae: Syngnathinae. Distribution: Western Atlantic: including Gulf of Mexico and Caribbean Sea. Habitat: marine.