[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

New papers




I don't think these have been mentioned yet, but if they have, my apologies...


Gonzalez Riga, Bernardo J. (2005). New fossil remains of _Mendozasaurus neguyelap_ (Sauropoda, Titanosauria) from the Late Cretaceous of Mendoza, Argentina. Ameghiniana 42(3): 535-548.

ABSTRACT: In South America, most titanosaur species are represented by incomplete skeletal elements lacking well-preserved cervical vertebrae. In this context, the discovery of cervical remains assigned to _Mendozasaurus neguyelap_ Gonzalez Riga is relevant from a systematic viewpoint. The fossils were found in the paleontological site and assemblage of the holotype, Rio Neuquen Subgroup, late Turonian - late Coniacian from Mendoza Province, Argentina. The cervical vertebrae of _Mendozasaurus_ exhibit differences with those of most titanosaurs; however, they share with _Isisaurus colberti_ (Jain and Bandyopadhyay) from Maastrichthian of India the presence of: a) short vertebral centra (ratio: total length/height of cotyle less than 2.5), b) large and deep supradiapophyseal fossa, and c) relatively tall neural spines (ratio: vertebral height / centrum length more than 1.5). The fossils recovered show an autapomorphic character that enlarges the diagnosis of _Mendozasaurus_: tall, laminar and transversally expanded mid-posterior cervical neural spines that are wider than vertebral centra and 'fan-like' or 'subrhomboid' in shape due to lateral expansions and a subrounded dorsal border. The fossil record of titanosaurs shows a notable morphologic diversity in the cervical series. In particular, _Mendozasaurus neguyelap_ and _Isisaurus colberti_ possess tall neural spines associated with the proportionally shortest cervical centra of any titanosaur. This unusual morphology suggests the development of relatively wide, robust and short necks in Late Cretaceous sauropods from Argentina and India."


Smith, Joshua B., Lamanna, Matthew C., Mayr, H., and Lacovara, Kenneth J. (2006). New information regarding the holotype of _Spinosaurus aegyptiacus_ Stromer, 1915. J. Paleont. 80(2): 400-406.


(No abstract. The paper describes two "rediscovered" high-quality photographs of the original _S. aegyptiacus_ holotype, before it was blown to smithereens.)


Cheers

Tim