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

More New-ish Papers...

It appears 2006 isn't done with us yet...!

First, from Spain:

Pérez-Lorente, F., Hadri, M., and Boutakiout, M. 2006. Primeras icnitas de dinosaurio en sur del Alto Atlas Central. Carixiense (Formación de Arhbalou. Goulmima. Marruecos). Geogaceta 40:159-162.

ABSTRACT: The first found tracks of dinosaur in the North of the Goulmima-Tinerhir line (Inner Haut Atlas Central, Morocco) are described. They are located in the Arhbalou Formation and come from isolated and grouped prints mainly of theropod dinosaur. They have importance by the enlargement of the geographical area with dinosaur paleoichnological sites and by they constitute the first dated Carixian dinosaur footprints founds in Morocco.

Pérez-Lorente, F., Guillén-Mondéjar, F., and del Ramo, A. 2006. Primeras icnitas de dinosaurio en Murcia (Albiense de Yecla). Geogaceta 39:147-150.

ABSTRACT: The first found tracks of dinosaur in Murcia are described. They are in the formation Utrillas of Yecla and come from herds of sauropod dinosaur. In spite of the bad conservation, they have importance by the shortage of tracks in Spain of Albian and because they open the possibility for future campaigns of surface survey.

Then, from Brazil:

Medeiros, M.A. 2006. Large theropod teeth from the Eocenomanian of northeastern Brazil and the occurrence of Spinosauridae. Revista Brasileira de Paleontologia 9(3):333-338.

ABSTRACT: Theropoda teeth can show sufficiently distinct features to be, in some cases, considered as confident diagnostic material. In this work, 275 complete or fragmentary teeth, collected at the Laje do Coringa site (Alcântara Formation), have been analyzed. In some of them, the typical spinosaurine morphology is present while in others an intriguing morphology was observed: teeth combining typical features of spinosaurines (smooth carinae with wrinkles on its base) with other characters as absolutely smooth enamel and basal cross section gently compressed labio-lingually. These different forms typify two morphotypes; a number of other teeth present variation that links them by a morphologic gradient. Morphotype 1 records the presence of spinosaurine dinosaurs in the Eocenomanian of northeastern Brazil and morphotype 2 may represent a new species of Theropoda, unknown by skeletal remains, and perhaps closely related to the spinosaurine form recorded.

Gallo de França, M.A., and Langer, M.C. 2006. Phylogenetic relationships of the Bauru Group turtles (Late Cretaceous of south-central Brazil). Revista Brasileira de Paleontologia 9(3):365-373.

ABSTRACT: No chelonian of the Bauru Group (Late Cretaceous of south-central Brazil) has so far been included in a numerical cladistic analysis with an explicit taxon-character data matrix. Out of the five taxa formally described from that stratigraphic unit, those based on more complete specimens - Bauruemys elegans, Cambaremys langertoni, and Roxochelys wanderleyi - were considered in a cladistic study of the pro-Podocnemidae Pelomedusoides. The resulting hypothesis of relationships places the specimen known as FR-4922 and Brasilemys josai among Pelomedusoides basal to Podocnemoidea. Within that clade, the Bauru Group taxa lie basal to Podocnemidae. Roxochelys is revealed to be a monophyletic genus, closer to Podocnemidae than the other analyzed Cretaceous forms. Among these, Bauruemys elegans is more derived than Portezueloemys patagonica, while the position of Cambaremys langertoni is ambiguous. Within extant Podocnemidae, a sister group relationship between Peltocephalus dumerilianus and Erymnochelys madagascariensis is proposed.

Brandalise de Andrade, M., Bertini, R.J., and Piacentini Pinheiro, A.E. 2006. Observations on the palate and choanae structures in Mesoeucrocodylia (Archosauria, Crocodylomorpha): phylogenetic implications. Revista Brasileira de Paleontologia 9(3):323-332.

ABSTRACT: The palate and choanae structures are important to the study of the evolution in Crocodylomorpha. Notosuchians, sebecosuchians and other Mesoeucrocodylia show a considerable diversity of patterns. Some notosuchians (Mariliasuchus, Notosuchus, Sphagesaurus) possess important similarities with at least one sebecosuchian (Stratiotosuchus), especially the triangular-subtriangular choanae, and the exclusion of the pterygoid from the posterior border of the suborbital fenestra. The use of these characteristics may represent useful information in phylogenetic analysis and should always be described in detail.

Bertini, R.J. 2006. Taphonomy and depositional history of an Upper Cretaceous turtle-bearing outcrop from the Adamantina Formation, southwestern São Paulo State. Revista Brasileira de Paleontologia 9(2):181-186.

ABSTRACT: The Adamantina Formation deposits (Upper Cretaceous) from the Bauru Basin, in southwestern São Paulo State, have revealed an extraordinary and well preserved assemblage of fossil turtles. In this contribution some new unique findings from these deposits and the Bauru Basin, are reported and discussed. Additionally, some peculiar sedimentary structures, as a bone fragment crossing two sedimentary layers, associated with the fossils, are described and biostratinomic considerations regarding these materials are made. The turtle remains from the studied outcrop have undergone short subaerial exposure and transport, being quickly buried. It was also verified that the time elapsed between these sedimentary episodes, in one of the samples, was almost instantaneous.

Lastly, two brand-new papers I don't have yet:

Averianov, A.O. 2007. Mid-Cretaceous ornithocheirids (Pterosauria, Ornithocheiridae) from Russia and Uzbekistan. Paleontological Journal 41(1): 79-86.

Christian, A. and Dzemski, G. 2007. Reconstruction of the cervical skeleton posture of Brachiosaurus brancai Janensch, 1914 by an analysis of the intervertebral stress along the neck and a comparison with the results of different approaches. Fossil Record 10(1): 38-49.

Jerry D. Harris
Director of Paleontology
Dixie State College
Science Building
225 South 700 East
St. George, UT  84770   USA
Phone: (435) 652-7758
Fax: (435) 656-4022
E-mail: jharris@dixie.edu
and     dinogami@gmail.com

"Trying to estimate the divergence times
of fungal, algal or prokaryotic groups on
the basis of a partial reptilian fossil and
protein sequences from mice and humans
is like trying to decipher Demotic Egyptian with
the help of an odometer and the Oxford
English Dictionary."
-- D. Graur & W. Martin (_Trends
in Genetics_ 20[2], 2004)