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Machaeroprosopus
''Machaeroprosopus'' is an extinct genus of mystriosuchin leptosuchomorph phytosaur from the Late Triassic of the southwestern United States. ''M. validus'', once thought to be the type species of ''Machaeroprosopus'', was named in 1916 on the basis of three complete skulls from Chinle Formation, Arizona. The skulls have been lost since the 1950s, and a line drawing in the original 1916 description is the only visual record of the specimen. Another species, ''M. andersoni'', was named in 1922 from New Mexico, and the species ''M. adamanensis'', ''M. gregorii'', ''M. lithodendrorum'', ''M. tenuis'', and ''M. zunii'' were named in 1930. Most species have been reassigned to the genera ''Smilosuchus'', ''Rutiodon'', or ''Phytosaurus''. Until recently, ''M. validus'' was considered to be the only species that has not been reassigned. Thus, ''Machaeroprosopus'' was considered to be a '' nomen dubium'' or "doubtful name" because of the lack of diagnostic specimens that can support its d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machaeroprosopus Buceros
''Machaeroprosopus'' is an extinct genus of mystriosuchin leptosuchomorph phytosaur from the Late Triassic of the southwestern United States. ''M. validus'', once thought to be the type species of ''Machaeroprosopus'', was named in 1916 on the basis of three complete skulls from Chinle Formation, Arizona. The skulls have been lost since the 1950s, and a line drawing in the original 1916 description is the only visual record of the specimen. Another species, ''M. andersoni'', was named in 1922 from New Mexico, and the species ''M. adamanensis'', ''M. gregorii'', ''M. lithodendrorum'', ''M. tenuis'', and ''M. zunii'' were named in 1930. Most species have been reassigned to the genera ''Smilosuchus'', ''Rutiodon'', or ''Phytosaurus''. Until recently, ''M. validus'' was considered to be the only species that has not been reassigned. Thus, ''Machaeroprosopus'' was considered to be a ''nomen dubium'' or "doubtful name" because of the lack of diagnostic specimens that can support its dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machaeroprosopus Andersoni Skull
''Machaeroprosopus'' is an extinct genus of mystriosuchin leptosuchomorph phytosaur from the Late Triassic of the southwestern United States. ''M. validus'', once thought to be the type species of ''Machaeroprosopus'', was named in 1916 on the basis of three complete skulls from Chinle Formation, Arizona. The skulls have been lost since the 1950s, and a line drawing in the original 1916 description is the only visual record of the specimen. Another species, ''M. andersoni'', was named in 1922 from New Mexico, and the species ''M. adamanensis'', ''M. gregorii'', ''M. lithodendrorum'', ''M. tenuis'', and ''M. zunii'' were named in 1930. Most species have been reassigned to the genera ''Smilosuchus'', ''Rutiodon'', or ''Phytosaurus''. Until recently, ''M. validus'' was considered to be the only species that has not been reassigned. Thus, ''Machaeroprosopus'' was considered to be a ''nomen dubium'' or "doubtful name" because of the lack of diagnostic specimens that can support its dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mystriosuchin
Mystriosuchini, historically known as Pseudopalatinae, is an extinct tribe (formerly subfamily) of derived phytosaurs in the clade Leptosuchomorpha. As with all other phytosaurs, mystriosuchins lived during Late Triassic. The name is derived from the genus '' Mystriosuchus''. Genera classified in Mystriosuchini include '' Coburgosuchus'', '' Machaeroprosopus'', '' Mystriosuchus'', '' Nicrosaurus'' and ''Redondasaurus''.Hungerbühler A. 2002. The Late Triassic phytosaur ''Mystriosuchus westphali'', with a revision of the genus. ''Palaeontology'' 45 (2): 377-418 It includes the most ecologically divergent phytosaurs, the terrestrial '' Nicrosaurus'' and the fully aquatic '' Mystriosuchus''.Gozzi, E. & Renesto, S.A. 2003. Complete specimen of Mystriosuchus (Reptilia, Phytosauria) from the Norian (Late Triassic) of Lombardy (Northern Italy). Rivista Italiana Di Paleontologia e Stratigrafia 109(3): 475-498. Phylogeny Below is a cladogram A cladogram (from Greek ''clados'' "branc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smilosuchus
''Smilosuchus'' (meaning "chisel crocodile") is an extinct genus of leptosuchomorph parasuchid from the Late Triassic of North America. History The type species was first described in 1995 as a replacement generic name for ''Leptosuchus gregorii''. Because of the large rostral crest it possessed, it was considered to be distinct enough from other species of '' Leptosuchus'' (all of which had smaller and more restricted crests) to be within its own genus. Some studies seem to suggest that ''Smilosuchus'' is congeneric with ''Leptosuchus'', as the enlarged crest could have been independently developed in ''Leptosuchus''. However, newer studies support the idea that ''Smilosuchus'' is distinct from the type species of ''Leptosuchus'', ''Leptosuchus crosbiensis''. Phylogenetic analyses suggest that ''Smilosuchus'' is more closely related to mystriosuchins than to ''Leptosuchus'' species. Description Like all phytosaurs, ''Smilosuchus'' had the nostrils close to the top of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2013 In Paleontology
Plants Cnidarians Arthropods Bryozoans Brachiopods Molluscs Echinoderms Conodonts Fishes Amphibians Research * Laloy ''et al.'' (2013) reinterpret the Eocene frog species ''Rana cadurcorum'' from the Quercy Phosphorites (France) as a junior synonym of '' Thaumastosaurus gezei''. Newly named temnospondyls Newly named lepospondyls Newly named lissamphibians Turtles Research * A study on the anatomy of the brain and inner ear of the Jurassic turtle ''Plesiochelys etalloni'' is published by Paulina Carabajal ''et al.'' (2013). Newly named turtles Thalattosaurs Ichthyopterygians Lepidosauromorphs Newly named sauropterygians Newly named rhynchocephalians Newly named lizards Newly named snakes Archosauromorphs Newly named basal archosauromorphs Archosaurs Other reptiles Synapsids Non-mammalian synapsids Research * The postcranial skeleton of therocephalian '' Ictidosuchoides'' is described by Heidi Fourie (2013). New taxa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytosaur
Phytosaurs (Φυτόσαυροι in greek) are an extinct group of large, mostly semiaquatic Late Triassic archosauriform reptiles. Phytosaurs belong to the order Phytosauria. Phytosauria and Phytosauridae are often considered to be equivalent groupings containing the same species, but some studies have identified non-phytosaurid phytosaurians. Phytosaurs were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodilians in size, appearance, and lifestyle, as an example of convergence or parallel evolution. The name "phytosaur" means "plant reptile", as the first fossils of phytosaurs were mistakenly thought to belong to plant eaters. The name is misleading because the sharp teeth in phytosaur jaws clearly show that they were predators. For many years, phytosaurs were considered to be the most basal group of Pseudosuchia (crocodile-line archosaurs), meaning that they were thought to be more closely related to the crocodilians than to birds (the othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bull Canyon Formation
The Cooper Canyon Formation is a geological formation of Norian age in Texas and New Mexico.Weishampel, David B; et al. (2004).Dinosaur distribution (Late Triassic, North America)" In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 518–521. . Type area of the formation is situated in Garza County, Texas. An equivalent formation in eastern New Mexico is named Bull Canyon Formation. Some researchers argue that the latter name should be abandoned. The formation consist of reddish siltstone and mudstone with lenses of sandstone and conglomerate. Thickness of the formation in the type area is 161.5 meters. It increases to the south, and in some places exceeds 200 m. The formation contains diverse fossils, including vertebrate remains. Vertebrate fauna Temnospondyls Allokotosaurs Archosaurs and related Procolophonomorphs Misc. See also * List of dinosaur-bearing rock formatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinle Formation
The Chinle Formation is an Upper Triassic continental geological formation of fluvial, lacustrine, and palustrine to eolian deposits spread across the U.S. states of Nevada, Utah, northern Arizona, western New Mexico, and western Colorado. In New Mexico, it is often raised to the status of a geological group, the Chinle Group. Some authors have controversially considered the Chinle to be synonymous to the Dockum Group of eastern Colorado and New Mexico, western Texas, the Oklahoma panhandle, and southwestern Kansas. The Chinle Formation is part of the Colorado Plateau, Basin and Range, and the southern section of the Interior Plains.GEOLEX database entry for Chinle USGS (viewed 19 March 2006) A probable separate depositional basin within the Chinle is found in northwestern Colorado and northeastern Ut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinle Group
The Chinle Formation is an Upper Triassic continental geological formation of fluvial, lacustrine, and palustrine to eolian deposits spread across the U.S. states of Nevada, Utah, northern Arizona, western New Mexico, and western Colorado. In New Mexico, it is often raised to the status of a geological group, the Chinle Group. Some authors have controversially considered the Chinle to be synonymous to the Dockum Group of eastern Colorado and New Mexico, western Texas, the Oklahoma panhandle, and southwestern Kansas. The Chinle Formation is part of the Colorado Plateau, Basin and Range, and the southern section of the Interior Plains.GEOLEX database entry for Chinle USGS (viewed 19 March 2006) A probable separate depositional basin within the Chinle is found in northwestern Colorado and northeastern Ut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rutiodon
''Rutiodon'' ("Wrinkle tooth") is an extinct genus of phytosaur belonging to the family Parasuchidae. It lived during the Late Triassic period, and was about in length. ''Rutiodon'' is known from the eastern United States (North Carolina, New Jersey, and Pennsylvania). Description Like other phytosaurs, ''Rutiodon'' strongly resembled a crocodile, but its nostrils were positioned far back on the head, close to the eyes, instead of at the tip of the snout. It had enlarged front teeth, and a relatively narrow jaw, somewhat resembling that of a modern gharial. This suggests that this carnivore probably caught fish and it may also have snatched land animals from the waterside. Also, like modern crocodiles, its back, flanks, and tail were covered with bony armored plates. ''Rutiodon'' was among the largest carnivorous animals of its environment, measuring 3–8 meters (10–26 ft) in length. Species The type species of ''Rutiodon'' is ''R. carolinensis''. A second species, ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptosuchomorph
Leptosuchomorpha is a clade of phytosaurs. It is a node-based taxon defined as the last common ancestor of '' Leptosuchus studeri'' and '' Pseudopalatus pristinus'' and all of its descendants. Phylogeny Below is a cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to ... from Stocker (2012): References Phytosaurs Late Triassic reptiles of Europe Late Triassic reptiles of North America Late Triassic first appearances Late Triassic extinctions Taxa named by Michelle R. Stocker {{paleo-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skull
The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, these two parts are the neurocranium and the viscerocranium ( facial skeleton) that includes the mandible as its largest bone. The skull forms the anterior-most portion of the skeleton and is a product of cephalisation—housing the brain, and several sensory structures such as the eyes, ears, nose, and mouth. In humans these sensory structures are part of the facial skeleton. Functions of the skull include protection of the brain, fixing the distance between the eyes to allow stereoscopic vision, and fixing the position of the ears to enable sound localisation of the direction and distance of sounds. In some animals, such as horned ungulates (mammals with hooves), the skull also has a defensive function by providing the mount (on the front ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_(35766606070).jpg "Click for more on -> Chinle Group")
