Pliotrema Regan [C. T.] 1906:1 Neut. Pliotrema warreni Regan 1906. Type by monotypy. •Valid as Pliotrema Regan 1906 -- (Compagno 1984:132 [ref. 6474], Bass & Heemstra 1986:106 [ref. 5639], Cappetta 1987:65 [ref. 6348], Compagno 1999:475 [ref. 25589], Castro 2011:159 [ref. 31457], Ebert & Wilms 2013:86 [ref. 33035], Weigmann et al. 2014:189 [ref. 33315], Fricke et al. 2018:21 [ref. 35805], Weigmann et al. 2020:1 [ref. 37396], Ebert et al. 2021:37 [ref. 38234]). Current status: Valid as Pliotrema Regan 1906. Pristiophoridae.