Yangchuanosaurus was a large, powerful meat-eater. There was a bony ridge on its nose and multiple hornlets and ridges, similar to Ceratosaurus. Paul suggested that these are the same species and gave a length of 11 meters (36 feet) and a weight of 3 metric tons (3.3 short tons). It may have been up to 10.8 meters (35 ft) long, and weighed as much as 3.4 metric tons (3.7 short tons). magnus, was even larger, with a skull length of 1.11 meters (3.6 ft). Another specimen, assigned to the new species Y. shangyouensis had a skull 82 centimeters (2.69 ft) long, and its total body length was estimated at 8 meters (26 ft). It was first described by Gao (1993), and all specimens were collected from the Middle Jurassic Xiashaximiao Formation in the Dashanpu Dinosaur Quarry of Zigong, Sichuan. Yangchuanosaurus zigongensis is known from four specimens including ZDM 9011 ( holotype), a partial postcranial skeleton ZDM 9012, a left maxilla ZDM 9013, two teeth and ZDM 9014, a right hind limb. shangyouensis and therefore was designated as the second species of Yangchuanosaurus. Furthermore, Szechuanosaurus zigongensis was found to be closely related to Y. shangyouensis, and thus the former is assignable to it. A phylogenetic analysis found CV 00214 to be most closely related to Y. (2012)) suggested that CV 00214 and "S." zigongensis cannot be cospecific as there are no autapomorphies shared between them, and the latter derives from the underlying Xiashaximiao Formation. However, the most recent revision (by Carrano et al. A recent restudy of CV 00214 by Daniel Chure (2001) concluded that it represented a new taxon, informally named "Szechuanoraptor dongi", into which Szechuanosaurus zigongensis should also be subsumed. campi (IVPP V.235, V.236, V.238, V.239 teeth) are non-diagnostic and no teeth are preserved in CV 00214. campi because the holotype materials of S. (2012) noted that CV 00214 can't be assigned to S. (1983) described it, and assigned it to Szechuanosaurus campi, a dubious species which is known only from four teeth. There is no description or illustration of it, making S. (1978) in a faunal list as a new species of Szechuanosaurus, Szechuanosaurus "yandonensis". CV 00214 was initially listed by Dong et al. It was collected in the Wujiaba Quarry, near Zigong city, Sichuan, from the lower part of the Shangshaximiao Formation. CV 00214 is represented by a partial postcranial skeleton lacking the skull. shangyouensis specimens compared to a humanĬarrano et al. Paul (1988) regarded this genus the same as Metriacanthosaurus, but this has not been supported. Hence, the holotypes of the two species of Yangchuanosaurus are effectively identical, and their codings are identical in Carrano et al. Furthermore, the apparent difference in cervical vertebral morphology can be explained by comparing different positions within the column. However, it is considered to be an intraspecific, possibly ontogenetic, variation. shangyouensis possessed only a fossa in this location. magnus has an additional fenestra within the antorbital fossa, whereas Y. (1983) differentiated these species primarily on the basis of size. A detailed revision of tetanuran phylogeny by Carrano, Benson & Sampson (2012) revealed that both species are conspecific. (1983) on the basis of CV 00216, another complete skull and skeleton. A second species from the same locality, Y. It was discovered in June 1977 by a construction worker during the construction of the Shangyou Reservoir Dam. It dates to the Oxfordian stage of the Late Jurassic period, about 161.2 to 157.3 million years ago. (1978) named Yangchuanosaurus shangyouensis on the basis of CV 00215, a complete skull and skeleton which was collected from the Shangshaximiao Formation, near Yongchuan, Yongchuan District, Sichuan. zigongensis, Delaware Museum of Natural HistoryÄong et al. Find new creatures and genetic skins by discovering genetic material from all over the world, unleashing unseen levels of customization and choice.Mounted skeleton of Y.From the majestic Woolly Mammoth to the mighty Tyrannosaurus rex, undo the rules of extinction by breeding a diverse selection of over 20 species of prehistoric wildlife.Ensure resources and safety is kept in-order to delay the inevitable! Take up the role of park manager by developing the infrastructure to care for guests, animals and staff alike. Unlock your creativity with robust modular building tools to construct housing and shelters by hand.Grow jungles, carve rivers and raise mountains across the enormous playable area to create the perfect park for your specimens. Design and decorate beautiful habitats using an array of powerful creative tools.Take control of limitless power to build, manage and grow the ultimate zoo for extinct animals in Prehistoric Kingdom.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |