cylindroideus, Conger Ranzani [C.] 1839:80 [16], Pl. 13 (figs. 2a-b) [Novi Commentarii Academiae Scientiarum Instituti Bononiensis v. 4 [1840]; ref. 18606] Brazilian seas. Holotype (unique): MZUB 988. Appeared first without description as Ranzani in Alessandrini 1838:433 [ref. 25852]. Dates to publication in a separate, on p. 16 and Pl. 6 in 1839; journal version in 1840. •Mention -- (McCosker 1977:60 [ref. 6836]). •Valid as Ophichthus cylindroideus (Ranzani 1839) -- (McCosker et al. 1989:386 [ref. 13288], Leiby in Smith 1989:809 [ref. 13285], McCosker 2003:733 [ref. 26993], Menezes in Menezes et al. 2003:35 [ref. 27192] dated 1840, McCosker et al. 2012:11 [ref. 31982], Di Dario et al. 2013:262 [ref. 37503], Petry et al. 2016:300 [ref. 34966], Ribeiro et al. 2019:4 [ref. 36717], Rotundo et al. in Marceniuk et al. 2021:112 [ref. 38945], Carvalho-Filho 2023:58 [ref. 40480]). Current status: Valid as Ophichthus cylindroideus (Ranzani 1839). Ophichthidae: Ophichthinae. Distribution: Western Atlantic: southern Caribbean Sea south to southeastern Brazil. Habitat: marine.