Oostethus Hubbs [C. L.] 1929:3 Masc. Doryichthys lineatus Kaup 1856. Type by original designation (also monotypic). Treated as masculine by author. •Synonym of Microphis Kaup 1853, but a valid subgenus Oostethus -- (Dawson 1984:151 [ref. 5879], Dawson 1985:126, 127 [ref. 6541], Dawson 1986:284 [ref. 6201]). •Valid as Oostethus Hubbs 1929 -- (Dawson 1982:36 [ref. 6764], Araga in Masuda et al. 1984:86 [ref. 6441], Fritzsche & Vincent 2003:1222 [ref. 27044], Kottelat 2013:306 [ref. 32989]). •Synonym of Microphis Kaup 1853 -- (Hamilton et al. 2016:Supplement 4 [ref. 35615], Haÿ et al. 2023:21 [ref. 40264]). Current status: Synonym of Microphis Kaup 1853. Syngnathidae: Nerophinae.