Re: TyrannotitanPosté par Gigy
Voilà une copie d'un petit article sur l'animal. c'est l'équipe de calvo, et de novas qui les ont déterrés.
Novas, F.E, S. de Valai, P. Vickers-Rich & T. Rich (2005).
A large Cretaceous theropod from Patagonia, Argentina, and
the evolution of carcharodontosaurids. Naturwissenschaften
online advance publication (Apr. 16, 2005).
voilà les références des l'article. je le cherche, svp. si quelqu'un l'a. ils en parlerons de toute façon dans le dernier glut, 2005
"Estimated Length: roughly 45-50 feet (13.7-15.2 meters).
Estimated Weight: roughly 6-7 tons.
Placement: Carcharodontosauridae (All taxa closer to Carcharodontosaurus than Allosaurus)
Locality & Age: La Juanita Farm, 28 km NE of Paso de Indios, Chubut Province, Argentina. (?) Cerro Castaño Member, Cerro Barcino Formation (Aptian 112.2 - 121 mya.)
Holotype Material Collected: (designated MPEF-PV 1156) Partial dentaries, teeth, dorsals 3-8 & 11-14, proximal caudals, ribs & haemal arches, fragmentary scapulocoracoid, humerus, & ulna, partial ilium, nearly complete femur, fibula, & left metatarsal 2.
Additional Material Collected: (designated MPEF-PV 1157) jugals, a right dentary, teeth, atlas vertebra (including neurapophyses), cervical (?) 9, dorsal (?)7, 10, 13, fused sacral centra (5 total), assortment of distal caudals, ribs, right femur, fragmentary left metatarsal 2, pedal phalanges 2-1, 2-2, & 3-3.
This taxon comes standard with: bilobate denticles on the mesial carina, a strong groove for (?) the inferior alveolar nerve along the lateral surface of the dentary, and dorsal neural spines heavily scarred for ligament insertion.
Our knowledge of Carcharodontosaurids has finally been expanded a tad with this guy. I consider the debut of this monster an appetizer for what is to come: publishing of the as-yet-unnamed taxon discovered by Currie et al several years back. There really isn't much to say about Tyrannotitan so far. Only a very brief description of the fossils has been published (a mere 4 pages). The teeth are apparently less blade-like than those of its kin, and possess odd, lumpy denticles (you can barely distinguish a groove in the center, dividing each denticle into 2 parts). Unlike known Carch's, this animal lacks pneumaticity extending into the sacral and caudal centra. The scapulocoracoid is fused, and much better developed than that of Giganotosaurus carolinii, yet the arm is still very small. Most of the shaft of the scapula is missing. The acromion curves till it's offset about 90 degrees from the shaft axis, making it look vaguely Tyrannosaurid-like. Whether the sharp difference between taxa is due to evolution or sexual dimorphism in poorly-sampled populations of both species, nobody can tell, of course (the latter seems unlikely). A proximal caudal has a very tall neural spine (about twice the height of its centrum, judging by the figure). With such a nice deep tail, I doubt Tyrannotitan, like Ceratosaurus, would have had much difficulty swimming. The base of the orbital fenestra is a notch of nearly 90 degrees into the body of the jugal, which contrasts with the rounded base restored for Giganotosaurus and agrees with Carcharodontosaurus favorably."
Novas, F.E, S. de Valai, P. Vickers-Rich & T. Rich (2005).
A large Cretaceous theropod from Patagonia, Argentina, and
the evolution of carcharodontosaurids. Naturwissenschaften
online advance publication (Apr. 16, 2005).
voilà les références des l'article. je le cherche, svp. si quelqu'un l'a. ils en parlerons de toute façon dans le dernier glut, 2005
"Estimated Length: roughly 45-50 feet (13.7-15.2 meters).
Estimated Weight: roughly 6-7 tons.
Placement: Carcharodontosauridae (All taxa closer to Carcharodontosaurus than Allosaurus)
Locality & Age: La Juanita Farm, 28 km NE of Paso de Indios, Chubut Province, Argentina. (?) Cerro Castaño Member, Cerro Barcino Formation (Aptian 112.2 - 121 mya.)
Holotype Material Collected: (designated MPEF-PV 1156) Partial dentaries, teeth, dorsals 3-8 & 11-14, proximal caudals, ribs & haemal arches, fragmentary scapulocoracoid, humerus, & ulna, partial ilium, nearly complete femur, fibula, & left metatarsal 2.
Additional Material Collected: (designated MPEF-PV 1157) jugals, a right dentary, teeth, atlas vertebra (including neurapophyses), cervical (?) 9, dorsal (?)7, 10, 13, fused sacral centra (5 total), assortment of distal caudals, ribs, right femur, fragmentary left metatarsal 2, pedal phalanges 2-1, 2-2, & 3-3.
This taxon comes standard with: bilobate denticles on the mesial carina, a strong groove for (?) the inferior alveolar nerve along the lateral surface of the dentary, and dorsal neural spines heavily scarred for ligament insertion.
Our knowledge of Carcharodontosaurids has finally been expanded a tad with this guy. I consider the debut of this monster an appetizer for what is to come: publishing of the as-yet-unnamed taxon discovered by Currie et al several years back. There really isn't much to say about Tyrannotitan so far. Only a very brief description of the fossils has been published (a mere 4 pages). The teeth are apparently less blade-like than those of its kin, and possess odd, lumpy denticles (you can barely distinguish a groove in the center, dividing each denticle into 2 parts). Unlike known Carch's, this animal lacks pneumaticity extending into the sacral and caudal centra. The scapulocoracoid is fused, and much better developed than that of Giganotosaurus carolinii, yet the arm is still very small. Most of the shaft of the scapula is missing. The acromion curves till it's offset about 90 degrees from the shaft axis, making it look vaguely Tyrannosaurid-like. Whether the sharp difference between taxa is due to evolution or sexual dimorphism in poorly-sampled populations of both species, nobody can tell, of course (the latter seems unlikely). A proximal caudal has a very tall neural spine (about twice the height of its centrum, judging by the figure). With such a nice deep tail, I doubt Tyrannotitan, like Ceratosaurus, would have had much difficulty swimming. The base of the orbital fenestra is a notch of nearly 90 degrees into the body of the jugal, which contrasts with the rounded base restored for Giganotosaurus and agrees with Carcharodontosaurus favorably."
Posté par Lolo
J'ai l'article ... t'as un email ? 
Posté par Gigy
Je te l'envoie par mp, merci st lolo. Il est bien illustré, profite en pour mettre les photos de spino si c'est pas trop te demander. 
Dis sur le site que tu m'as donné il évaluent la taille de l'holotype de stromer à 17 m, le petit nouveau fait combien alors 142 m et 3500 tonnes!!!!
i ont petté un cable.
Cela à part cela, dit le site est très bien fait.
je t'ai répondu sur le site carchérodontosauridae. attention gigy sors ses griffes!!
ce sont ses petits protégés.
Dis sur le site que tu m'as donné il évaluent la taille de l'holotype de stromer à 17 m, le petit nouveau fait combien alors 142 m et 3500 tonnes!!!!
i ont petté un cable.
Cela à part cela, dit le site est très bien fait.
je t'ai répondu sur le site carchérodontosauridae. attention gigy sors ses griffes!!
ce sont ses petits protégés.
Posté par Velou
Site carchérodontosauridae?
Posté par Lolo
Topic "carcharodontosauridae" ...
Posté par Velou
Ok, merci
Posté par Gigy
Ouuuuups j'ai tapé trop vite.
Posté par Velou
et c'est ça tes protégés ?
Posté par Gigy
Oui mais quelle idée d'avoir un nom si compliqué et si long!!!!!
Posté par Eragon
Ben, comparé à Bruhathkayosaurus et Krzynawowskisaurus ça va encore.
Posté par Gigy
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