MolluscaBase name details
original description
Kobelt, W. (1886). Die Landdeckelschnecken. <em>Semper C (Ed.) Reisen im Archipel der Philippinen. (2). Kreidel, Wiesbaden.</em> 4(2), 1–80., available online at https://biodiversitylibrary.org/page/11672705
page(s): 70, pl. 7, figs. 26, 27 [details]
additional source
Bartsch, P. (1918). Classification of the Philippine operculate land shells of the family Helicinidae, with a synopsis of the species and subspecies of the genus <i>Geophorus</i>. <em>Journal of the Washington Academy of Sciences.</em> 8 (20): 643-657 [4 December]., available online at https://biodiversitylibrary.org/page/2035705
page(s): 644 [details]