original description
Haas, F. (1951). Remarks on and descriptions of South American non-marine shells. <em>Fieldiana: Zoology.</em> 31(46): 503-545., available online at https://www.biodiversitylibrary.org/page/2784155
page(s): 526-527, figs. 112A-C [details]
additional source
Ramírez, R.; Paredes, C.; Arenas, J. (2003). Moluscos del Perú. <em>Revista de Biologia Tropical.</em> 51(supplement 3): 225-284.
page(s): 284; note: misspelled as E. hemiophalus [details] Available for editors [request]
From editor or global species database
Type locality Peru [details]