Post by dinosauria101 on Oct 28, 2019 18:50:08 GMT 5
Nanuqsaurus hoglundi
Nanuqsaurus (meaning "polar bear lizard") is an extinct genus of carnivorous tyrannosaurid theropod known from the Late Cretaceous (early Late Maastrichtian stage) Prince Creek Formation of the North Slope of Alaska. It contains a single species, Nanuqsaurus hoglundi, known only from a partial skull. Nanuqsaurus has been estimated to have been about 6.8 meters (slightly over 22 feet) and 1.5 tons, based on relatives. This dimunitive size was postulated by Fiorillo and Tykoski as being an adaptation to its high latitude habitat. Nanuqsaurus bears a particularly shaped ridge on its head indicating the carnivore was related to Tyrannosaurus rex. The length of the reconstructed skull, based on the proportions of related animals, is 60–70 cm (24–28 in). Classified as a tyrannosaurine, Nanuqsaurus is diagnosed by: a thin, rostrally-forked, median spur of the fused parietals on the dorsal skull roof that overlaps and separates the frontals within the sagittal crest, frontals with a long, rostrally-pointed process separating the prefrontal and lacrimal facets and that the first two dentary teeth are much smaller than the dentary teeth behind them.
Siamraptor suwati
Siamraptor is an extinct genus of carcharodontosaurian dinosaur, containing the single species S. suwati known from the Khok Kruat Formation of Thailand. It is the first definitive named carcharodontosaurian species known from Southeast Asia. The body length of Siamraptor has been estimated at twenty-six feet (eight metres).[3] The describing authors indicated some distinguishing traits. These are autapomorphies, unique derived characters, relative to the Allosauroidea. The jugal bone has a lower edge that is straight instead of convex or undulating while the front branch is high, even under the eye socket. The surangular bone has a deep oval excavation to the rear of its bone shelf and four rear surangular foramina, while other theropods possess at most two. A long narrow groove runs along the suture between the surangular and the prearticular bone. The notch in the suture between the articular and prearticular is pierced by a foramen. The front neck vertebrae possess an additional pneumatic foramen excavating the parapophysis, the lower rib contact. The neck vertebrae and rear back vertebrae have paired small foramina in the base of the neural spine.
Credit to Wikipedia
Nanuqsaurus (meaning "polar bear lizard") is an extinct genus of carnivorous tyrannosaurid theropod known from the Late Cretaceous (early Late Maastrichtian stage) Prince Creek Formation of the North Slope of Alaska. It contains a single species, Nanuqsaurus hoglundi, known only from a partial skull. Nanuqsaurus has been estimated to have been about 6.8 meters (slightly over 22 feet) and 1.5 tons, based on relatives. This dimunitive size was postulated by Fiorillo and Tykoski as being an adaptation to its high latitude habitat. Nanuqsaurus bears a particularly shaped ridge on its head indicating the carnivore was related to Tyrannosaurus rex. The length of the reconstructed skull, based on the proportions of related animals, is 60–70 cm (24–28 in). Classified as a tyrannosaurine, Nanuqsaurus is diagnosed by: a thin, rostrally-forked, median spur of the fused parietals on the dorsal skull roof that overlaps and separates the frontals within the sagittal crest, frontals with a long, rostrally-pointed process separating the prefrontal and lacrimal facets and that the first two dentary teeth are much smaller than the dentary teeth behind them.
Siamraptor suwati
Siamraptor is an extinct genus of carcharodontosaurian dinosaur, containing the single species S. suwati known from the Khok Kruat Formation of Thailand. It is the first definitive named carcharodontosaurian species known from Southeast Asia. The body length of Siamraptor has been estimated at twenty-six feet (eight metres).[3] The describing authors indicated some distinguishing traits. These are autapomorphies, unique derived characters, relative to the Allosauroidea. The jugal bone has a lower edge that is straight instead of convex or undulating while the front branch is high, even under the eye socket. The surangular bone has a deep oval excavation to the rear of its bone shelf and four rear surangular foramina, while other theropods possess at most two. A long narrow groove runs along the suture between the surangular and the prearticular bone. The notch in the suture between the articular and prearticular is pierced by a foramen. The front neck vertebrae possess an additional pneumatic foramen excavating the parapophysis, the lower rib contact. The neck vertebrae and rear back vertebrae have paired small foramina in the base of the neural spine.
Credit to Wikipedia