nigrolineatus, Syngnathus Eichwald [C. E. von] 1831:61 [Zoologia specialis quam expositis animalibus tum vivis Pars posterior [3]; ref. 5562] Black Sea near Odessa, Ukraine. Syntypes: whereabouts unknown. Also appeared as new in Eichward 1838:106 [ref. 34622]. •Valid as Syngnathus nigrolineatus Eichwald 1831 -- (Berg 1949:982 [ref. 20662], Mitrofanov & Dukravec 1989:121 [ref. 37748], Reshetnikov et al. 1997:748 [ref. 24702], Savvaitova 1998:114 [ref. 23594], Bogutskaya et al. 2001:46 [ref. 26178]). •Synonym of Syngnathus abaster Risso 1827 -- (Wheeler 1973:274 [ref. 7190], Dawson in Whitehead et al. 1986:635 [ref. 13676], Dawson 1986:287 [ref. 6201], Coad 1995:27 [ref. 23608], Kottelat 1997:167 [ref. 22952], Bilecenoğlu et al. 2002:66 [ref. 26753], Kottelat & Freyhof 2007:501 [ref. 29996], Ninua & Japoshvili 2008:170 [ref. 31251], Parin et al. 2014:208 [ref. 33547]). Current status: Synonym of Syngnathus abaster Risso 1827. Syngnathidae: Syngnathinae. Habitat: freshwater, brackish, marine.