MolluscaBase taxon details
original description
(of Helix pachystyla L. Pfeiffer, 1845) Pfeiffer, L. (1845). Descriptions of twenty-two new species of <i>Helix</i>, from the collections of Miss Saul, Walton Esq., and H. Cuming, Esq. <em>Proceedings of the Zoological Society of London.</em> 13 (148/149): 71–75. London [31 October]., available online at https://www.biodiversitylibrary.org/page/12862567
page(s): 71 [details]
original description
(of Thersites pachystyla var. subfuscozonata J. C. Cox, 1894) Cox, J. C. (1894). Notes on Thersites pachystyla Pfr. var. subfusco-zonata, var. nov. from Queensland. <em>Proceedings of the Linnean Society of New South Wales.</em> 23: 650-652., available online at https://biodiversitylibrary.org/page/2909768 [details]