Posté par Velou
Posté par Eragon
Posté par Velou
Posté par Eragon
Posté par Velou
Posté par Velou
il y a aussi allosaurus maximus (saurophaganax), allosaurus atrox ...
toutes les espèces valides : fragilis/maximus/amplexus/jimmadsenus/
triherodon/whitei/tendagurensis
espèce non-valides :
allosaure polaire, allosaurus français ...
allosaurus, je le connait bien (c'est l'un de mes dinos préférés)
Posté par Eragon
ferox, lucaris : ce sont deux synonymes de fragilis ;
medius : Tétanoure douteux ;
sibiricus : Peut-être synonyme de Chilantaisaurus
Voilà !
Posté par Velou
ou chilantaisaurus vit-il, a quelle époque?
ou vit allosaurus medium ? a quelle époque?
Posté par Eragon
Posté par Velou
Posté par Eragon
Chilantaisaurus siribicus, lui, vivait en Russie au début du Crétacé inférieu et on a retrouvé de lui un métatarse.
Posté par Velou
Posté par Eragon
Posté par Velou
Posté par Eragon
Et Chilantaiasaurus tashuikouensis est bien un Théropode à part.
Posté par Velou
Posté par Eragon
Sans doutes ? Mais c'est le cas ! Chilantaisaurus tashuikouensis est bien un dino valide !
Posté par Velou
Posté par Eragon
Posté par Velou
"Allosaurus" "robustus" Chure, 2000 vide Glut, 2003
Early Aptian, Early Cretaceous
Wonthoggi Formation of Strzelecki Group, Victoria, Australia
Material- (NMV Pl50070) (~6 m) astragalus
Comments- Chure (2000) is the first person to publish the name Allosaurus "robustus", previously confined to a museum label. He goes into depth regarding the supposed Allosaurus synapomorphies given by Molnar et al. (1981, 1985). The fibular facet on the ascending process is found in Torvosaurus and coelurosaurs too. The presence of an inflection in the ascending process' medial margin cannot be determined with certainty. Similarly, the calcanear notch would be higher up if present and not confluent with the lower horizontal groove. The upper horizontal grrove extending across the base of the ascending process is also found in Elaphrosaurus, Afrovenator, Poekilopleuron, "Szechuanoraptor" zigongensis, sinraptorids, Deltadromeus and several other neotheropods. Chure notes it differs from Allosaurus in having a more parallel-sided ascending process, lacking a thickened medial edge on that process, having a vertical groove running up the caudal face of the ascending process, lacking a circular pit at the caudal base of the acsending process, having a weaker lower horizontal groove, having a sharper anterior edge on the upper horizontal groove, and lacking an extensive cranial depression on the ascending process. He refers it to the Avetheropoda.
I agree with Azuma and Currie (2000) that this astragalus is most similar to Fukuiraptor, which shares the characters listed above. However, in Fuikuiraptor, the ascending process extends further medially, has a sharper ventrolateral corner, and is narrower posteroventrally. "Allosaurus" "robustus" seems to be a valid taxon of basal carnosaur.
Names in theses aren't usually listed in this website, and this one is only because it was later published by Glut (2003). Glut's work includes a caveat to the effect that it is not available to establish new taxonomy however, so the name remains unofficial.
References- Molnar, Flannery and Rich, 1981. An allosaurid theropod dinosaur from the early Cretaceous of Victoria, Australia. Alcheringa 5 p. 141-146.
Welles, 1983. Allosaurus (Saurischia, Theropoda) not yet in Australia. Journal of Paleontology. 57 196
Molnar, Flannery and Rich, 1985. Aussie Allosaurus after all. Journal of Paleontology. 59 1511-1513
Chure, 1998. A reassessment of the Australian Allosaurus and its implications for the Australian refugium concept. Journal of Vertebrate Paleontology 18(suppl. 3): 34A.
Chure, 2000. A new species of Allosaurus from the Morrison Formation of Dinosaur National Monument (Utah-Colorado) and a revision of the theropod family Allosauridae. Ph.D. dissertation, Columbia University, 1-964.
Glut, 2003. Dinosaurs - The Encyclopedia - Supplement 3. McFarland Press, Jefferson, NC.