original description
(of Helicina discoidea Pease, 1868) Pease, W. H. (1868). Descriptions of new species of land snails inhabiting Polynesia. <em>American Journal of Conchology.</em> 3(3): 223-230, pl. 15., available online at https://www.biodiversitylibrary.org/page/6658962
page(s): 226 [details]
additional source
Gerlach, J. ([2017]). <i>Land and freshwater snails of Tahiti and the other Society Islands.</i> Cambridge: Phelsuma Press. 67 pp.
page(s): 6 [details]
new combination reference
Richling I. & Bouchet P. (2013). Extinct even before scientific recognition: a remarkable radiation of helicinid snails (Helicinidae) on the Gambier Islands, French Polynesia. <em>Biodiversity and Conservation.</em> 22: 2433-2468., available online at https://doi.org/10.1007/s10531-013-0496-2 [details]
From editor or global species database