original description
Morelet, A. & Drouët, H. (1857). Conchologiae Azoricae prodromus novarum specierum diagnoses sistens. <em>Journal de conchyliologie.</em> 6 (3): 148-154., available online at https://www.biodiversitylibrary.org/page/15862673
page(s): 149 [details]
additional source
Morelet, A. (1860). Iles Açores. Notice sur l'histoire naturelle des Açores suivi d'une description des mollusques terrestres de cet archipel. <em>Baillère et fils, Paris.</em> 1-214 [+ 2], 5 pls., available online at https://www.biodiversitylibrary.org/item/44501
page(s): 166, Pl. 3, Fig. 2 [details]
From editor or global species database
Type locality San-Miguel [details]