Localidade tipo: Peru, [Departamento de Cajamarca], “road Chiclayo-Cutervo, ca. 85 km NE Chiclayo, near Llama”
Altitude: 2000 – 2250 m
Nome original: Thaumastus (Thaumastiella) occidentalis Weyrauch, 1960
Fotos: (1) Senckenberg Research Institute and Natural History Museum Frankfurt, HOLOTYPE SMF 162026, “N-Peru am Westhang der westlichen Anden: In der Umgebung von Contumazá, 110 km nnö Trujillo”, 2750 m de altitude, 45.7mm
Fontes:
Descrição original: (como Thaumastus (Thaumastiella) occidentalis Weyrauch,1960)Weyrauch, W. K. (1960). Zwanzig neue Landschnecken aus Peru. Archiv für Molluskenkunde. 89 (1/3): 23-48, pl. 3-6. Frankfurt am Main.
página(s): 28
Breure, Bram. (2012). Weurauch’s type localities: a clarification; with illustrations of types of Orthalicoidea (Mollusca, Gastropoda, Stylommatophora) in the Tucumán museum. Folia conchyliologica. 17. 4-24
Ramírez, R.; Paredes, C.; Arenas, J. (2003). Moluscos del Perú. Revista de Biologia Tropical. 51 (supplement 3): 225-284