Fotos: (1,2) Natural History Museum, Londres: SYNTYPE de Happia tortilis (Morelet, 1863), NHMUK 1893.2.4.1288-1291, Peru
Fontes:
Descrição original: (como Helix tortilis Morelet, 1863)Morelet, A. (1863). Séries conchyliologiques comprenant l’énumération de mollusques terrestres et fluviatiles recueillis pendant le cours de différents voyages ainsi que la description de plusieurs espèces nouvelles. 3: 131-221, pls. 7-11. Paris: Klincksieck., disponível online em https://www.biodiversitylibrary.org/page/11913497
página(s): 165, pl. 7, fig. 2
Ramírez, R.; Paredes, C.; Arenas, J. (2003). Moluscos del Perú. Revista de Biologia Tropical. 51(supplement 3): 225-284
Natural History Museum (2026). Natural History Museum (London) Collection Specimens. Occurrence dataset https://doi.org/10.5519/qd.rl8sm135 accessed via GBIF.org on 2026-03-30. https://www.gbif.org/occurrence/1826208517