original description (unavailable nomenclaturally)
Orbigny, A. d'. (1844). Paléontologie du voyage de M. Hommaire de Hell dans les steppes de la mer Caspienne, le Caucase, la Crimée et la Russie méridionale. In: X. Hommaire de Hell. Les steppes de la mer Caspienne, le Caucase, la Crimée et la Russie méridionale. Voyage pittoresque, historique et scientifique. Tome troisième. Levrault, Paris, pp. 419–496., available online at https://biodiversitylibrary.org/page/15918242
page(s): pl. 6, figs 1-2 [details]
From editor or global species database
Validity Not available from d'Orbigny (1844), who explicitly stated on p. 472 that the name Beaumontianum is a mistake. He actually referred the specimens to Cardium protractum Eichwald. Eichwald (1853) considered d'Orbigny's specimens different from C. protractum and united them with his Cardium obsoletum Eichwald, 1830. [details]