hynnicephalus, Rhinobatus Richardson [J.] 1846:195 [Report of the British Association for the Advancement of Science 15th meeting [1845]; ref. 3742] China Seas; Canton, China. No types known. Based on illustration by Reeves (see Whitehead 1970:207, Pl. 11a [ref. 11606]). •Valid as Rhinobatos hynnicephalus Richardson 1846 -- (Nakaya in Masuda et al. 1984:12 [ref. 6441], Compagno & Randall 1987:340 [ref. 9128], Zheng & Qiu 1993:81 [ref. 21982], Compagno 1999:486 [ref. 25589], Nakabo 2000:160 [ref. 25086], Compagno in Randall & Lim 2000:582 [ref. 25122], Shinohara et al. 2001:290 [ref. 25995], Nakabo 2002:160 [ref. 26001], Choi et al. 2003:65, 481 [ref. 26218], Last 2004:208 [ref. 27765], Last et al. 2006:267 [ref. 29418], Yamashita et al. 2012:128 [ref. 32408], Ebert et al. 2013:349 [ref. 33045], Shinohara et al. 2014:234 [ref. 33330], Last et al. 2014:42 [ref. 33525], Weigmann 2016:87 [ref. 34211], Last et al. 2016:459 [ref. 34473], White et al. 2016:596 [ref. 34839], Séret et al. 2016:99 [ref. 34993], Ebert & Gon 2017:205 [ref. 35352], Sonoyama et al. 2020:11 [ref. 37637]). Current status: Valid as Rhinobatos hynnicephalus Richardson 1846. Rhinobatidae. Distribution: Northwestern Pacific. Habitat: marine.