brevicaudum, Siphostoma Meek [S. E.] 1904:163, Fig. 51 [Field Columbian Museum, Zoölogical Series v. 5; ref. 2958] Boca del Río, Veracruz, Mexico. Holotype: FMNH 4586. Paratypes: FMNH 4587 (2). Type catalog: Ibarra & Stewart 1987:79 [ref. 12367]. •Synonym of Oostethus brachyurus (Bleeker 1853), subspecies lineatus (Kaup 1856) -- (Dawson 1979:476 [ref. 19285], Dawson 1982:17 [ref. 6764]). •Synonym of Microphis brachyurus (Bleeker 1853), subspecies lineatus (Kaup 1856) -- (Castro-Aguirre et al. 1999:233 [ref. 24550]). •Synonym of Microphis lineatus (Kaup 1856) -- (Ferraris in Reis et al. 2003:591 [ref. 27061], Haÿ et al. 2023:23 [ref. 40264]). Current status: Synonym of Microphis lineatus (Kaup 1856). Syngnathidae: Nerophinae. Habitat: freshwater, brackish, marine.