Traits taxon details
original description
(of Trigonia clavellata Parkinson, 1811 †) Parkinson, J. (1804-1811). <i>Organic remains of a former world. An examination of the mineralized remains of the vegetables and animals of the Antediluvian World; generally termed extraneous fossils</i>. 3 volumes. J. Robson, London. , available online at https://www.biodiversitylibrary.org/bibliography/131022 page(s): 175, pl. 12, fig. 3 [details]
original description
(of Trigonia bronnii Agassiz, 1840 †) Agassiz, L. (1840). Études critiques sur les mollusques fossiles; Mémoire sur les Trigonies. Neuchâtel, Petitpierre, 1-58. page(s): 18, pl. 5, fig. 19 [details]
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