nelsonensis, Griffinetta Whitley [G. P.] & Phillipps [W. J.] 1939:233 [Transactions and Proceedings of the Royal Society of New Zealand v. 69 (no. 2); ref. 4737] Nelson, New Zealand. Holotype: NMNZ P.214. Type catalog: Hardy 1990:11 [ref. 18942]. On Pseudopentaceros richardsoni of McCulloch & Phillipps 1923, RAM v. 14 (no. 1), p. 18, Pl. 4 (fig. 1). •Synonym of Pentaceros richardsoni Smith 1844 -- (Follett & Dempster 1963:315 [ref. 6569]). •Synonym of Pseudopentaceros richardsoni (Smith 1844) -- (Hardy 1983:206 [ref. 5385], Gomon et al. 1994:636 [ref. 22532]). •Synonym of Pentaceros richardsoni Smith 1844. Current status: Synonym of Pentaceros richardsoni Smith 1844. Pentacerotidae: Pentacerotinae. Habitat: marine.