Walcott, C. D. (1884). Paleontology of the Eureka district. <em>United States Geological Survey Monograph.</em> 8(8): 1-298., available online athttps://biodiversitylibrary.org/page/19654888 page(s): 171, pl. 4, fig. 8, 8a [details]
MolluscaBase eds. (2025). MolluscaBase. Modiomorpha obtusa Walcott, 1884 †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1733031 on 2025-05-17
Marine Species Traits editorial board (2025). Marine Species Traits. Modiomorpha obtusa Walcott, 1884 †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1733031 on 2025-05-17
original descriptionWalcott, C. D. (1884). Paleontology of the Eureka district. <em>United States Geological Survey Monograph.</em> 8(8): 1-298., available online athttps://biodiversitylibrary.org/page/19654888 page(s): 171, pl. 4, fig. 8, 8a [details]