Griffin & Nielsen (2008):
TYPE MATERIAL. A search through the collections at the MNHN in Paris was unsuccessful in locating the sole specimen that d’Orbigny illustrated. He probably had additional syntypes, but – as in the case of the illustrated one – none of them was found.
REMARKS. D’Orbigny (1842) mentioned the fact that this species is rarely found with its shell. This suggests that he had available more than one specimen. The material described more recently by del Río as Dinocardium novus (del Río 1994, p. 106-107, pl. 1, fig. 5) from Valdés Peninsula is very well preserved and generally with most of the shell. This group of bivalves is in need of revision in order to clarify its taxonomic relationship and nomenclature, but the species introduced by del Río seems to be a synonym of d’Orbigny’s large species, and the features she stated as differentiating the two taxa can be attributed to size and normal intraspecific variation.
Voyage dans l'Amerique méridionale.
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del Rio,C.J.. (1994):
Middle Miocene Bivalves of the Puerto Madryn Formation, Valdés Peninsule, Chubut Province, Argentina. Part II : Lucinidae - Pholadidae . Palaeontographica A Vol. 231 p. 93-132
del Rio,C.J.. (2000):
Malacofauna de las Formaciones Paraná y Puerto Madryn (Mioceno marino, Argentina): su origen, composición y significado bioestratigráfico.
In: El Neógeno de Argentina, Serie Correlación Geológica Vol. 14 Eds: Aceñolaza, F.G..Herbst, R.. p. 77-101
Griffin,M.. and Nielsen,S.N.. (2008):
A revision of the type specimens of Tertiary molluscs from Chile and Argentina described by d’Orbigny (1842), Sowerby (1846), and Hupé (1854) . Journal of Systematic Palaeontology