MolluscaBase taxon details
original description
(of Helix bicarinata G. B. Sowerby I, 1824) Sowerby, G. B. I. (1824). Descriptions, accompanied by figures, of several Helices, discovered by T. E. Bowdich, Esq. at Porto Santo. <em>Zoological Journal.</em> 1: 56-58 [March]., available online at https://www.biodiversitylibrary.org/page/27570783
page(s): 58, pl. 3, fig. 7 [details]
original description
(of Helix (Helicella) duplicata R. T. Lowe, 1831) Lowe, R. T. (1831). Primitiae faunae et florae Maderae et Portus Sancti; sive species quaedam novae vel hactenus minus rite cognitae animalium et plantarum in his insulis degentium breviter descriptae. <em>Transactions of the Cambridge Philosophical Society.</em> 4 (1): 1-70, pl. 1-6. Cambridge., available online at https://www.biodiversitylibrary.org/page/13265840
page(s): 58, pl. 6 fig. 20 [details]
basis of record
Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16th, 2017. [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): 27, Figs 31–54 [details]