Coelocephalus Gilbert [C. H.] & Cramer [F.] 1897:422 Masc. Coelocephalus acipenserinus Gilbert & Cramer 1897. Type by monotypy. Objectively invalid; preoccupied by Coelocephalus Clark 1860 in Coleoptera (not preoccupied by Agassiz 1844, name only); replaced by Mataeocephalus Berg 1898. •Synonym of Mataeocephalus Berg 1898 -- (Marshall 1973:618 [ref. 6965], Iwamoto 1979: 144 [ref. 2311], Iwamoto in Cohen et al. 1990:244 [ref. 18936], Sazanov et al. 2003:281 [ref. 27176], Castellanos-Galindo et al. 2006:205 [ref. 28944]). 1°Homonym. Current status: Synonym of Mataeocephalus Berg 1898. Macrouridae.