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Re: Pterosaur size (Was: Great in the air, not so good underwater)

Mike Taylor wrote:

Don't forget _Puertasaurus reuili_, a truly absurd titanosaur from the
Maastrichtian of Patagonia:

        Novas, Fernando E., Leonardo Salgado, Jorge Calvo and Federico
        Agnolin.  2005.  Giant titanosaur (Dinosauria, Sauropoda) from
        the Late Cretaceous of Patagonia.  Rev. Mus. Argentino
        Cienc. Nat., n.s.  7(1): 37-41.

Yep, it was a whopper all right. But, based on known specimens, there were fewer enormous sauropods at the end of the Cretaceous than at the end of the Jurassic. _Puertasaurus_ was atypically large for a Maastrichtian sauropod. It represented the opposite end of the spectrum to the relatively runty saltasaurines.

Gigantic sauropods are known from as early as the Middle Jurassic, such as the ichnotaxon _Breviparopus_ and an unnamed sauropod with a femur 2.36 m long (Charroud and Fedan, 1992) - if they did not come from one and the same species. In terms of sheer body mass, the heydey of the sauropods seems to have been the Late Jurassic and Early Cretaceous, with most lineages ending with a whimper more than a bang.

Charroud M. and Fedan B. (1992). Données préliminaires sur la découverte du gisement de
Boulahfa à dinosauriens (SW de Boulemane, moyen Atlas central). In: Le Maroc, promontoire
africain entre la méditerranée et l?Atlantique, Livre à la mémoire de Georges Choubert, Notes
Mém. Serv. géol. Maroc 366: 448-449.



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