original description
(of Helix (Hystricella) echinoderma Wollaston, 1878 †) Wollaston, T.V. (1878). Testacea Atlantica or the land and freshwater shells of the Azores, Madeiras, Salvages, Canaries, Cape Verdes, and Saint Helena. i-xi, [1], 1-588, 1-16. London. (Reeve)., available online at https://www.biodiversitylibrary.org/page/18928631
page(s): 159-160 [details]
basis of record
Seddon, M.B. (2008). The landsnails of Madeira. The illustrated compendium of the landsnails and slugs of the Madeiran archipelago. Biotir Reports [Studies in biodiversity and systematics of terrestrial organisms], 2: i-viii, 1-196. Cardiff [June].,
page(s): 80 [details]
additional source
De Mattia, W., Neiber, M. T. & Groh, K. (2018). Revision of the genus-group Hystricella R. T. Lowe, 1855 from Porto Santo (Madeira Archipelago), with descriptions of new recent and fossil taxa (Gastropoda, Helicoidea, Geomitridae). <em>ZooKeys.</em> 732: 1-125., available online at https://doi.org/10.3897/zookeys.732.21677
page(s): 48, Figs 95–96 [details]
From editor or global species database
Extinction Extinct before the islands’ scientific exploration in the 19th century, possibly already before human settlement. [details]