Dead, discovered, copied and forgotten: history and description of the first discovered ichthyosaur from the Upper Jurassic of Italy

Résumé fourni par la source

In 2017 attention was brought back to the specimen V7158 from the Verona Natural History Museum. The fossil is a small fragment of an ichthyosaur rostrum discovered in the XIX century in the Verona territory (northeastern Italy) representing one of the first findings of Ichthyosauria in Italy. The specimen, after long oblivion, was re- discovered in the 1990s but until now was never officially described. In this paper we provide morphological analysis, taxonomic attribution, taphonomic analysis and age determination to V7158 as well as a detailed reconstruction of the peculiar history of this discovery. From our re-description, V7158 can be doubtfully attributed to Ophthalmosauridae and firmly assigned to the Tithonian. Age determination and the recognition of the source formation (Rosso Ammonitico Veronese, RAV) were achieved by means of calcareous nannofossils associated with the matrix of V7158 and through fieldwork activity in the area of discovery. Though fragmentary, the specimen is histologically very well preserved, a feature unusual for the taphonomic regime of the RAV and most likely restricted to its upper unit.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.