Effinger, W. L. (1938). The Gries Ranch fauna (Oligocene) of western Washington. <em>Journal of Paleontology.</em> 12(3): 355-390, pls. 45-47. page(s): 381-382, pl. 46, fig. 22 [details] Available for editors
MolluscaBase eds. (2025). MolluscaBase. Trichotropis alienensis Effinger, 1938 †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1767738 on 2025-05-21
Marine Species Traits editorial board (2025). Marine Species Traits. Trichotropis alienensis Effinger, 1938 †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1767738 on 2025-05-21
original descriptionEffinger, W. L. (1938). The Gries Ranch fauna (Oligocene) of western Washington. <em>Journal of Paleontology.</em> 12(3): 355-390, pls. 45-47. page(s): 381-382, pl. 46, fig. 22 [details] Available for editors
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