Post by dinosauria101 on Feb 22, 2019 18:30:40 GMT 5
Tyrannotitan chubutensis
Tyrannotitan (meaning "titanic tyrant") is a genus of huge bipedal carnivorous dinosaur of the carcharodontosaurid family from the Aptian stage of the early Cretaceous period, discovered in Argentina. It is closely related to other giant predators like Carcharodontosaurus and especially Giganotosaurus as well as Mapusaurus. Tyrannotitan is the geologically oldest known giant carcharodontosaurid along with the more basal Acrocanthosaurus from North America (both found in Aptian-age rocks). Unlike other known carcharodontosaurids, 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 very small. Most of the shaft of the scapula is missing. The length of these animals has been estimated at up to 11.4–12.2 metres (37–40 ft). In 2010, Gregory S. Paul gave higher estimations of 13 metres (43 ft). Its weight has been estimated between 4.9 and 7 tonnes (5.4 and 7.7 short tons).
Eotriceratops xerinsularis
Eotriceratops (meaning "dawn three-horned face") is a genus of herbivorous ceratopsian dinosaurs which lived in the area of North America during the late Cretaceous period. The only named species is Eotriceratops xerinsularis. Eotriceratops was named and described by Xiao-Chun Wu, Donald B. Brinkman, David A. Eberth and Dennis R. Braman in 2007. The type species is Eotriceratops xerinsularis. The generic name combines a Greek ἠώς, èos, "dawn", with the name of the genus Triceratops, in reference to an older age relative to that form. The specific name xerinsularis, means "of the dry island", from Greek ξηρός, xèros, "dry", and Latin insula, "island" and is a reference to the Dry Island Buffalo Jump Provincial Park where its remains were found. The holotype specimen, RTMP 2002.57.5, has been found in a layer of the uppermost Horseshoe Canyon Formation, dated to the early Maastrichtian, about 67.6 million years ago. It consists of a partial skeleton with skull, lacking the lower jaws. It contains a partial skull including parts of the frill sides, large horns above the eyes, and a small horn above the nose, similar to the closely related Triceratops. Its skull is said to have been around three metres long. This would put its full size estimates to 12 meters, though a more conservative estimate places the length of Eotriceratops at 9 meters (30 ft). In 2010, Paul estimated its length at 8.5 metres, its weight at ten tonnes. Eotriceratops was in 2007 placed in the Chasmosaurinae. In a cladistic analysis, it was recovered as a close relative of Triceratops, Nedoceratops and Torosaurus. It would have been the sister species of Triceratops. In view of its greater age, the describing authors considered it more likely that Eotriceratops was in fact basal to, lower in the evolutionary tree than, the other three genera.
Credit to Wikipedia
Tyrannotitan (meaning "titanic tyrant") is a genus of huge bipedal carnivorous dinosaur of the carcharodontosaurid family from the Aptian stage of the early Cretaceous period, discovered in Argentina. It is closely related to other giant predators like Carcharodontosaurus and especially Giganotosaurus as well as Mapusaurus. Tyrannotitan is the geologically oldest known giant carcharodontosaurid along with the more basal Acrocanthosaurus from North America (both found in Aptian-age rocks). Unlike other known carcharodontosaurids, 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 very small. Most of the shaft of the scapula is missing. The length of these animals has been estimated at up to 11.4–12.2 metres (37–40 ft). In 2010, Gregory S. Paul gave higher estimations of 13 metres (43 ft). Its weight has been estimated between 4.9 and 7 tonnes (5.4 and 7.7 short tons).
Eotriceratops xerinsularis
Eotriceratops (meaning "dawn three-horned face") is a genus of herbivorous ceratopsian dinosaurs which lived in the area of North America during the late Cretaceous period. The only named species is Eotriceratops xerinsularis. Eotriceratops was named and described by Xiao-Chun Wu, Donald B. Brinkman, David A. Eberth and Dennis R. Braman in 2007. The type species is Eotriceratops xerinsularis. The generic name combines a Greek ἠώς, èos, "dawn", with the name of the genus Triceratops, in reference to an older age relative to that form. The specific name xerinsularis, means "of the dry island", from Greek ξηρός, xèros, "dry", and Latin insula, "island" and is a reference to the Dry Island Buffalo Jump Provincial Park where its remains were found. The holotype specimen, RTMP 2002.57.5, has been found in a layer of the uppermost Horseshoe Canyon Formation, dated to the early Maastrichtian, about 67.6 million years ago. It consists of a partial skeleton with skull, lacking the lower jaws. It contains a partial skull including parts of the frill sides, large horns above the eyes, and a small horn above the nose, similar to the closely related Triceratops. Its skull is said to have been around three metres long. This would put its full size estimates to 12 meters, though a more conservative estimate places the length of Eotriceratops at 9 meters (30 ft). In 2010, Paul estimated its length at 8.5 metres, its weight at ten tonnes. Eotriceratops was in 2007 placed in the Chasmosaurinae. In a cladistic analysis, it was recovered as a close relative of Triceratops, Nedoceratops and Torosaurus. It would have been the sister species of Triceratops. In view of its greater age, the describing authors considered it more likely that Eotriceratops was in fact basal to, lower in the evolutionary tree than, the other three genera.
Credit to Wikipedia