Translator Disclaimer
1 May 2010 A New Species of Marine Ophidiomorph Lizard, Adriosaurus skrbinensis, from the Upper Cretaceous of Slovenia
Author Affiliations +
Abstract

A new species of the genus Adriosaurus Seeley, 1881, Adriosaurus skrbinensis, is described and diagnosed by the following unique features: presence of 30 dorsal vertebrae; much larger body size than that of A. suessi and A. microbrachis (about 60% larger); forelimbs much more reduced than the hind limbs, i.e., with a humerus/femur ratio of only 0.40; parietal foramen lying on the suture line between frontal and parietal; and anterior margin of the parietal convex anteriorly. Further features observed in A. skrbinensis, but obscured or poorly preserved in other adriosaurs, include intercentra articulating with (not fused or sutured to) cervical vertebrae; presence of high, rectangular neural spines on caudal vertebrae; very long chevron bones articulated to posterior ventral margin of caudal vertebrae; pubic bone with well-developed square anterior process and distinct pubic foramen. This new fossil suggests variability in the dorsal vertebrae count of Adriosaurus, ranging between 28 and 30. Similar to what has been observed in living scincids and anguids, there seems to be a direct relationship between axial elongation and shortening of the humerus in Adriosaurus. Cladistic analysis resulted in one shortest cladogram that places A. skrbinensis as the sister taxon to A. suessi.

© 2010 by the Society of Vertebrate Paleontology
Michael W. Caldwell and Alessandro Palci "A New Species of Marine Ophidiomorph Lizard, Adriosaurus skrbinensis, from the Upper Cretaceous of Slovenia," Journal of Vertebrate Paleontology 30(3), (1 May 2010). https://doi.org/10.1080/02724631003762963
Received: 11 June 2009; Accepted: 1 November 2009; Published: 1 May 2010
JOURNAL ARTICLE
9 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top