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Trilophosaurus
''Trilophosaurus'' (Greek for "lizard with three ridges") is a lizard-like trilophosaurid allokotosaur known from the Late Triassic of North America. It was a herbivore up to 2.5 m long. It had a short, unusually heavily built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material. Teeth are absent from the premaxilla and front of the lower jaw, which in life were probably equipped with a horny beak. The skull is also unusual in that the lower temporal opening is missing, giving the appearance of a euryapsid skull. Because of this, the trilophosaurs were once classified with placodonts within Sauropterygia. Carroll (1988) suggested that the lower opening may have been lost to strengthen the skull. ''Trilophosaurus'' is traditionally thought to include two valid species: the typical ''T. buettneri'' and the more robust ''T. jacobsi''. In 1993, paleontologists Hans-Dieter Sues and Paul E. Olsen reassigned '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilophosaurus Buettneri - AMNH - DSC06265
''Trilophosaurus'' (Greek for "lizard with three ridges") is a lizard-like trilophosaurid allokotosaur known from the Late Triassic of North America. It was a herbivore up to 2.5 m long. It had a short, unusually heavily built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material. Teeth are absent from the premaxilla and front of the lower jaw, which in life were probably equipped with a horny beak. The skull is also unusual in that the lower temporal opening is missing, giving the appearance of a euryapsid skull. Because of this, the trilophosaurs were once classified with placodonts within Sauropterygia. Carroll (1988) suggested that the lower opening may have been lost to strengthen the skull. ''Trilophosaurus'' is traditionally thought to include two valid species: the typical ''T. buettneri'' and the more robust ''T. jacobsi''. In 1993, paleontologists Hans-Dieter Sues and Paul E. Olsen reassigned ''T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilophosaurus NT Small
''Trilophosaurus'' (Greek for "lizard with three ridges") is a lizard-like trilophosaurid allokotosaur known from the Late Triassic of North America. It was a herbivore up to 2.5 m long. It had a short, unusually heavily built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material. Teeth are absent from the premaxilla and front of the lower jaw, which in life were probably equipped with a horny beak. The skull is also unusual in that the lower temporal opening is missing, giving the appearance of a euryapsid skull. Because of this, the trilophosaurs were once classified with placodonts within Sauropterygia. Carroll (1988) suggested that the lower opening may have been lost to strengthen the skull. ''Trilophosaurus'' is traditionally thought to include two valid species: the typical ''T. buettneri'' and the more robust ''T. jacobsi''. In 1993, paleontologists Hans-Dieter Sues and Paul E. Olsen reassigned ''T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilophosaurus Buettneri (1)
''Trilophosaurus'' (Greek for "lizard with three ridges") is a lizard-like trilophosaurid allokotosaur known from the Late Triassic of North America. It was a herbivore up to 2.5 m long. It had a short, unusually heavily built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material. Teeth are absent from the premaxilla and front of the lower jaw, which in life were probably equipped with a horny beak. The skull is also unusual in that the lower temporal opening is missing, giving the appearance of a euryapsid skull. Because of this, the trilophosaurs were once classified with placodonts within Sauropterygia. Carroll (1988) suggested that the lower opening may have been lost to strengthen the skull. ''Trilophosaurus'' is traditionally thought to include two valid species: the typical ''T. buettneri'' and the more robust ''T. jacobsi''. In 1993, paleontologists Hans-Dieter Sues and Paul E. Olsen reassigned '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilophosaurus Buettneri
''Trilophosaurus'' (Greek language, Greek for "lizard with three ridges") is a lizard-like trilophosaurid allokotosaur known from the Late Triassic of North America. It was a herbivore up to 2.5 m long. It had a short, unusually heavily built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material. Teeth are absent from the premaxilla and front of the lower jaw, which in life were probably equipped with a horny beak. The skull is also unusual in that the lower temporal fenestra, temporal opening is missing, giving the appearance of a euryapsida, euryapsid skull. Because of this, the trilophosaurs were once classified with placodonts within Sauropterygia. Robert L. Carroll, Carroll (1988) suggested that the lower opening may have been lost to strengthen the skull. ''Trilophosaurus'' is traditionally thought to include two valid species: the typical ''T. buettneri'' and the more robust ''T. jacobsi''. In 1993, p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilophosaurid
Trilophosaurs are lizard-like Triassic allokotosaur reptiles related to the archosaurs. The best known genus is ''Trilophosaurus'', a herbivore up to long. It had a short, unusually heavily built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material. Teeth are absent from the premaxilla and front of the lower jaw, which in life were probably equipped with a horny beak. The skull is also unusual in that the lower temporal opening is missing, giving the appearance of a euryapsid skull, and originally the Trilophosaurs were classified with placodonts and sauropterygia. Carroll (1988) suggests that the lower opening may have been lost to strengthen the skull. Trilophosaurs are so far known only from the Late Triassic of North America and Europe. Below is a cladogram showing the phylogenetic relationships of Trilophosauridae within Archosauromorpha Archosauromorpha (Greek for "ruling lizard forms") is a cla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allokotosauria
Allokotosauria is a clade of early archosauromorph reptiles from the Middle to Late Triassic known from Asia, Africa, North America and Europe. Allokotosauria was first described and named when a new monophyletic grouping of specialized herbivorous archosauromorphs was recovered by Sterling J. Nesbitt, John J. Flynn, Adam C. Pritchard, J. Michael Parrish, Lovasoa Ranivoharimanana and André R. Wyss in 2015. The name Allokotosauria is derived from Greek meaning "strange reptiles" in reference to unexpected grouping of early archosauromorph with a high disparity of features typically associated with herbivory. History Nesbitt ''et al.'' (2015) defined the group as a stem-based taxon containing ''Azendohsaurus madagaskarensis'' and '' Trilophosaurus buettneri'' and all taxa more closely related to them than to ''Tanystropheus longobardicus'', ''Proterosuchus fergusi'', ''Protorosaurus speneri'' or ''Rhynchosaurus articeps''. Therefore, Allokotosauria includes the families Azendoh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variodens
''Variodens'' is an extinct genus of trilophosaur. Fossils have been found from the Emborough Quarries in the Mendip Hills of Somerset, England. These fossils have been uncovered from a Late Triassic fissure fill within Carboniferous-age limestone. The type and only known species is ''V. inopinatus'', named in 1957. Description ''Variodens'' is unusual among most reptiles in that it has a heterodont dentition consisting of different types of teeth. The five anteriormost teeth at the front of the jaw are simple and conical in shape. The cheek teeth toward the back of the jaw are wide and have several cusps. They are either tricuspid or multicuspid. The anterior tricuspid teeth of ''Variodens'' are narrower medially (toward the inside of the mouth) than they are laterally (toward the outside of the mouth). ''Variodens'' also has distinctive bulbous-shaped penultimate teeth. The teeth of ''Variodens'' are very similar to the postcanine teeth of the cynodont ''Cricodon'' from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allokotosaur
Allokotosauria is a clade of early archosauromorph reptiles from the Middle Triassic, Middle to Late Triassic known from Asia, Africa, North America and Europe. Allokotosauria was first described and named when a new monophyletic grouping of specialized herbivorous archosauromorphs was recovered by Sterling J. Nesbitt, John J. Flynn, Adam C. Pritchard, J. Michael Parrish, Lovasoa Ranivoharimanana and André R. Wyss in 2015 in paleontology, 2015. The name Allokotosauria is derived from Greek language, Greek meaning "strange reptiles" in reference to unexpected grouping of early archosauromorph with a high disparity of features typically associated with herbivore, herbivory. History Nesbitt ''et al.'' (2015) defined the group as a stem-based taxon containing ''Azendohsaurus madagaskarensis'' and ''Trilophosaurus buettneri'' and all taxa more closely related to them than to ''Tanystropheus longobardicus'', ''Proterosuchus fergusi'', ''Protorosaurus speneri'' or ''Rhynchosaurus art ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinosuchus Caseanus
''Spinosuchus'' (meaning "spined crocodile") is an extinct genus of trilophosaurid allokotosaur from the Late Triassic of Texas, southern United States. It has been assigned to a variety of groups over its history, from coelophysid dinosaur to pseudosuchian to uncertain theropod dinosaur and to Proterosuchidae. This uncertainty is not unusual, given that it was only known from a poorly preserved, wall-mounted, partial vertebral column of an animal that lived in a time of diverse, poorly known reptile groups. However, newly collected material and recent phylogenetic studies of early archosauromorphs suggest that it represents an advanced trilophosaurid very closely related to ''Trilophosaurus''. History In 1922, Ermine Cowles Case described a partial vertebral column (UMMP 7507) he'd discovered in 1921 from the Tecovas Member of the Carnian-age Upper Triassic Dockum Formation of Crosby County, Texas, as ''Coelophysis'' sp. (''Coelophysis'' at that time also being poorly known).Cas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinosuchus
''Spinosuchus'' (meaning "spined crocodile") is an extinct genus of trilophosaurid allokotosaur from the Late Triassic of Texas, southern United States. It has been assigned to a variety of groups over its history, from coelophysid dinosaur to pseudosuchian to uncertain theropod dinosaur and to Proterosuchidae. This uncertainty is not unusual, given that it was only known from a poorly preserved, wall-mounted, partial vertebral column of an animal that lived in a time of diverse, poorly known reptile groups. However, newly collected material and recent phylogenetic studies of early archosauromorphs suggest that it represents an advanced trilophosaurid very closely related to ''Trilophosaurus''. History In 1922, Ermine Cowles Case described a partial vertebral column (UMMP 7507) he'd discovered in 1921 from the Tecovas Member of the Carnian-age Upper Triassic Dockum Formation of Crosby County, Texas, as ''Coelophysis'' sp. (''Coelophysis'' at that time also being poorly known). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sauropterygia
Sauropterygia ("lizard flippers") is an extinct taxon of diverse, aquatic reptiles that developed from terrestrial ancestors soon after the end-Permian extinction and flourished during the Triassic before all except for the Plesiosauria became extinct at the end of that period. The plesiosaurs would continue to diversify until the end of the Mesozoic. Sauropterygians are united by a radical adaptation of their pectoral girdle, adapted to support powerful flipper strokes. Some later sauropterygians, such as the pliosaurs, developed a similar mechanism in their pelvis. Uniquely among reptiles, sauropterygians moved their tail vertically like modern cetaceans and sirenians. Origins and evolution The earliest sauropterygians appeared about 247 million years ago (Ma), at the start of the Middle Triassic: the first definite sauropterygian with exact stratigraphic datum lies within the Spathian division of the Olenekian era in South China. Early examples were small (around 60 c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tricuspisaurus
''Tricuspisaurus'' is an extinct genus of reptile originally described as a trilophosaurid; it was later considered likely to be a procolophonid, but recent analyses have affirmed the original classification. Fossils are known from the Ruthin Quarry in Glamorgan, Wales, one of several Late Triassic to Early Jurassic British fissure deposits. Like some trilophosaurs, it has an edentulous, or toothless beak. ''Tricuspisaurus'' gets its name from its heterodont dentition, which includes ''tricuspid'' teeth, or teeth with three cusps. The type species, ''T. thomasi'', was named in 1957 along with the possible trilophosaur '' Variodens inopinatus'' from Somerset, England. Although originally classified as a trilophosaur, ''Tricuspisaurus'' was reclassified as a procolophonid in 1993 by paleontologists Hans-Dieter Sues and Paul E. Olsen Paul E. Olsen (born August 4, 1953) is an American paleontologist and author and co-author of a large number of technical papers. Growing up as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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