octodecemspinosus, Cottus Mitchill [S. L.] 1814:7 [Report, in part, of Samuel L. Mitchill; ref. 3030] New York, U.S.A. No types known. Also in Mitchill 1815:380 [ref. 13292]. Originally as 18-spinosus; correction mandatory; as octodecem-spinosus in Mitchill 1815:380 [ref. 13292]. •Valid as Cottus octodecemspinosus Mitchill 1814 -- (Herrera 1896:63 [ref. 39336] as octodecimspinosus). •Possibly valid as Megalocottus octodecemspinosus (Mitchill 1814) -- (Balakirev et al. 2020:11 [ref. 37873]). •Valid as Myoxocephalus octodecemspinosus (Mitchill 1814) -- (Neelov 1979:123 [ref. 3152], Smith 1986:450 [ref. 22186], Robins & Ray 1986:282 [ref. 23100] as octodecimspinosus, Scott & Scott 1988:502 [ref. 25518], McAllister 1990:200 [ref. 14674], Murdy et al. 1997:147 [ref. 23144], Klein-MacPhee in Collette & Klein-MacPhee 2002:351 [ref. 26158], Nelson et al. 2004:121 [ref. 27807], Page et al. 2013:124 [ref. 32708], Afonso et al. 2016:46, 226 [ref. 36199], Simian et al. 2022:375 [ref. 40776], Page et al. 2023:186 [ref. 40505]). Current status: Valid as Myoxocephalus octodecemspinosus (Mitchill 1814). Psychrolutidae. Distribution: Northwestern Atlantic. Habitat: brackish, marine.