original description
(of Pleurotoma (Drillia) gypsata R. B. Watson, 1881) Watson, R.B. (1881). Mollusca of H.M.S. Challenger Expedition. Parts VIII, IX, X. <em>Journal of the Linnean Society, Zoology.</em> 15: 388-475., available online at https://biodiversitylibrary.org/page/37088539
page(s): 413 [details]
additional source
Spencer H.G., Willan R.C., Marshall B.A. & Murray T.J. (2011). Checklist of the Recent Mollusca Recorded from the New Zealand Exclusive Economic Zone. , available online at http://www.molluscs.otago.ac.nz [details]
status source
Beu, A.G. 2011 Marine Molluscs of oxygen isotope stages of the last 2 million years in New Zealand. Part 4. Gastropoda (Ptenoglossa, Neogastropoda, Heterobranchia). Journal of the Royal Society of New Zealand 41, 1–153., available online at https://doi.org/10.1080/03036758.2011.548763 [details]
From editor or global species database