Agassiz, L. (1840). Études critiques sur les mollusques fossiles; Mémoire sur les Trigonies. Neuchâtel, Petitpierre, 1-58. page(s): 37, pl. 2, figs 8-12 [details]
MolluscaBase eds. (2025). MolluscaBase. Trigonia costellata Agassiz, 1840 †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=853329 on 2025-05-22
Marine Species Traits editorial board (2025). Marine Species Traits. Trigonia costellata Agassiz, 1840 †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=853329 on 2025-05-22
original descriptionAgassiz, L. (1840). Études critiques sur les mollusques fossiles; Mémoire sur les Trigonies. Neuchâtel, Petitpierre, 1-58. page(s): 37, pl. 2, figs 8-12 [details]