original descriptionPirona, G. A. (1884). Nuovi Fossili del terreno Cretaceo del Friuli. <em>Memorie del Reale Istituto Veneto di Scienze, Lettere ed Arti.</em> 22: 159-168, 3 pls., available online athttps://archive.org/details/memoriedelrealei221real/page/158/mode/2up page(s): 161-162, pl. 1, figs 1-9 [details]
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