trachyderma, Paraploactis Bleeker [P.] 1865:169 [Nederlandsch Tijdschrift voor de Dierkunde v. 2; ref. 411] Australia. Holotype (unique): RMNH 5892. •Valid as Paraploactis trachyderma Bleeker 1865 -- (Poss & Eschmeyer 1978:411 [ref. 6387], Paxton et al. 1989:461 [ref. 12442], Kuiter 1993:106 [ref. 23929], Larson & Williams 1997:353 [ref. 23967], Poss 1999:2358 [ref. 24796], Johnson 1999:728 [ref. 25471], Johnson 2004:181 [ref. 27781], Allen et al. 2006:915 [ref. 29066], Fricke et al. 2011:380 [ref. 31242], Larson et al. 2013:86 [ref. 32988]). •Valid as Paraploactis trachyderma Bleeker 1865, as aff. trachyderma -- (Prokofiev 2008:310 [ref. 29592], Prokofiev 2012:321 [ref. 32052]). Current status: Valid as Paraploactis trachyderma Bleeker 1865. Synanceiidae: Aploactininae. Distribution: Australia and New Caledonia. Habitat: marine.