original description
Morgan, J. de. (1886 ["1885"]). Mollusques terrestres & fluviatiles du Royaume de Pérak et des pays voisins (Presqu'ile Malaise). <em>Bulletin de la Société Zoologique de France.</em> 10(4-6): 353-428., available online at https://biodiversitylibrary.org/page/11306075
page(s): 379, pl. 5 fig. 9 [details]
additional source
Dall, W. H. (1897). Note on land shells from the Malay Peninsula. <em>The Nautilus.</em> 11(4): 37–38., available online at https://www.biodiversitylibrary.org/page/1774611
page(s): 38 [details]
source of synonymy
Maassen, W. J. M. (2001). A preliminary checklist of the non-marine molluscs of West-Malaysia: "a Hand List". <em>De Kreukel, Extra Editie 2001.</em> 1–155.
page(s): 107 [details] Available for editors [request]
From editor or global species database