Paleoage-le coin de la paleontologie

toutes la paleontologie
 
AccueilAccueil  PortailPortail  CalendrierCalendrier  FAQFAQ  RechercherRechercher  S'enregistrerS'enregistrer  MembresMembres  GroupesGroupes  Connexion  

Partagez | 
 

 Nouveau dino : Glacialisaurus hammeri

Voir le sujet précédent Voir le sujet suivant Aller en bas 
AuteurMessage
Tikémi
lambeosaure


Féminin
Nombre de messages : 193
Age : 33
Localisation : Bruxelles
Emploi : doctorante
Loisirs : lecture, puzzles
Date d'inscription : 07/06/2006

MessageSujet: Nouveau dino : Glacialisaurus hammeri   Lun 3 Déc - 13:50

Lolo nous a trouvé ceci :
Smith, N.D. and Pol, D. 2007. Anatomy of a basal sauropodomorph dinosaur from the Early Jurassic Hanson Formation of Antarctica. Acta Palaeontologica Polonica 52 (4): 657–674.

Le pdf : http://www.app.pan.pl/acta52/app52-657.pdf

The anatomy of a basal sauropodomorph (Dinosauria: Saurischia) from the Early Jurassic Hanson Formation of Antarctica is described in detail. The material includes a distal left femur and an articulated right pes, including the astragalus, distal tarsals, and metatarsals I–IV. The material is referable to Sauropodomorpha and represents a non−eusauropod, sauropodomorph more derived than the most basal members of Sauropodomorpha (e.g., Saturnalia, Thecodontosaurus, Efraasia, and Plateosaurus) based on a combination of plesiomorphic and derived character states. Several autapomorphies present in both the femur and metatarsus suggest that this material represents a distinct sauropodomorph taxon, herein named Glacialisaurus hammeri gen. et sp. nov. Some of the derived characters present in the Antarctic taxon suggest affinities with Coloradisaurus and Lufengosaurus (e.g., proximolateral flange on plantar surface of metatarsal II, well−developed facet on metatarsal II for articulation with medial distal tarsal, subtrapezoidal proximal surface of metatarsal III). Preliminary phylogenetic analyses suggest a close relationship between the new Antarctic taxon and Lufengosaurus from the Early Jurassic Lufeng Formation of China. However, the lack of robust support for the taxon’s phylogenetic position, and current debate in basal sauropodomorph phylogenetics limits phylogenetic and biogeographic inferences drawn from this analysis. The new taxon is important for establishing the Antarctic continent as part of the geographic distribution of sauropodomorph dinosaurs in the Early Jurassic, and recently recovered material from the Hanson Formation that may represent a true sauropod, lends support to the notion that the earliest sauropods coexisted with their basal sauropodomorph relatives for an extended period of time.
Revenir en haut Aller en bas
Voir le profil de l'utilisateur http://systemanaturae.wifeo.com
 
Nouveau dino : Glacialisaurus hammeri
Voir le sujet précédent Voir le sujet suivant Revenir en haut 
Page 1 sur 1
 Sujets similaires
-
» Un nouveau blog "L'express" consacré à l'éducation
» Poisson nouveau : loche de mer ?
» l'ART nouveau!
» Un nouveau dinosaure "broyeur’’ à bec de canard
» le nouveau livre de christophe Barbe il est là !

Permission de ce forum:Vous ne pouvez pas répondre aux sujets dans ce forum
Paleoage-le coin de la paleontologie :: Les dinosaures-
Sauter vers: