Traits taxon details
original description
(of Trigonia packardi F. M. Anderson, 1958 †) Anderson, F. M. 1958. Upper Cretaceous of the Pacific Coast. The Geological Society of America, Memoir 71, 1-378. page(s): 109, pl. 1, fig. 5 [details] Available for editors 
basis of record
Cooper, M. R. & Leanza, H. A. (2019). On the Middle Jurassic – Early Cretaceous Megatrigoniinae (Bivalvia, Trigoniida): their biogeography, evolution and classification. <em>Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen.</em> 291 (1): 19-40., available online at https://doi.org/10.1127/njgpa/2019/0787 [details] Available for editors 
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