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Anaschisma
''Anaschisma'' is an extinct genus of large temnospondyl amphibians. These animals were part of the family called Metoposauridae, which filled the crocodile-like predatory niches in the late Triassic. It had large skull about long, and possibly reached long. It was an ambush hunter, snapping up anything small enough to fit in its huge jaws. It was very common during the Late Triassic (Norian age) in what is now the American Southwest. History of discovery ''Anaschisma'' was erected by Branson (1905) for two metoposaurid skulls from the Popo Agie Formation of Wyoming. The type species, ''A. browni'', was coined for the skull UC 447, while a second nominal species, ''A. brachygnatha'', was erected for the skull UC 448. Moodie (1908) considered ''A. brachygnatha'' a junior synonym of ''A. browni'', although Branson and Mehl (1929) retained the two species as distinct.Branson, E. B. & Mehl, M. G. 1929. Triassic amphibians from the Rocky Mountain region. The University of Missouri S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buettneria Perfecta
''Anaschisma'' is an extinct genus of large temnospondyl amphibians. These animals were part of the family called Metoposauridae, which filled the crocodile-like predatory niches in the late Triassic. It had large skull about long, and possibly reached long. It was an ambush hunter, snapping up anything small enough to fit in its huge jaws. It was very common during the Late Triassic (Norian age) in what is now the American Southwest. History of discovery ''Anaschisma'' was erected by Branson (1905) for two metoposaurid skulls from the Popo Agie Formation of Wyoming. The type species, ''A. browni'', was coined for the skull UC 447, while a second nominal species, ''A. brachygnatha'', was erected for the skull UC 448. Moodie (1908) considered ''A. brachygnatha'' a junior synonym of ''A. browni'', although Branson and Mehl (1929) retained the two species as distinct.Branson, E. B. & Mehl, M. G. 1929. Triassic amphibians from the Rocky Mountain region. The University of Missouri S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Koskinonodon Perfectus
''Anaschisma'' is an extinct genus of large temnospondyl amphibians. These animals were part of the family called Metoposauridae, which filled the crocodile-like predatory niches in the late Triassic. It had large skull about long, and possibly reached long. It was an ambush hunter, snapping up anything small enough to fit in its huge jaws. It was very common during the Late Triassic (Norian age) in what is now the American Southwest. History of discovery ''Anaschisma'' was erected by Branson (1905) for two metoposaurid skulls from the Popo Agie Formation of Wyoming. The type species, ''A. browni'', was coined for the skull UC 447, while a second nominal species, ''A. brachygnatha'', was erected for the skull UC 448. Moodie (1908) considered ''A. brachygnatha'' a junior synonym of ''A. browni'', although Branson and Mehl (1929) retained the two species as distinct.Branson, E. B. & Mehl, M. G. 1929. Triassic amphibians from the Rocky Mountain region. The University of Missouri S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metoposauridae
Metoposauridae is an extinct family of trematosaurian temnospondyls. The family is known from the Triassic period. Most members are large, approximately long and could reach 3 m long.Brusatte, S. L., Butler R. J., Mateus O., & Steyer S. J. (2015). A new species of Metoposaurus from the Late Triassic of Portugal and comments on the systematics and biogeography of metoposaurid temnospondyls. Journal of Vertebrate Paleontology. e912988., 2015: Metoposaurids can be distinguished from the very similar mastodonsauroids by the position of their eyes, placed far forward on the snout. Taphonomy Several mass accumulations of metoposaurid fossils are known from the southwestern United States and Morocco. These have often been interpreted as the result of mass deaths from droughts. Many individuals would have died in one area, creating a dense bone bed once fossilized. These mass accumulations of metoposaurids are often dominated by one taxa, such as '' Anaschisma'' or '' Metoposaurus''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Popo Agie Formation
The Popo Agie Formation is a Triassic geologic formation that crops out in western Wyoming, western Colorado, and Utah. It was deposited during the Late Triassic in fluvial (river) and lacustrine (lake) environments that existed across much of what is now the American southwest. Fragmentary fossils of prehistoric reptiles and amphibians, including pseudosuchian reptiles and temnospondyl amphibians, have been discovered in the Popo Agie Formation. Dinosaur remains are also among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607. Paleobiota Amphibians Reptiles Synapsids See also * List of dinosaur-bearing rock formations ** List of stratigraphic units with indeterminate dinosaur fossils This list of stratigraphic units with indeterminate dinosaur fossils includes stratigraphic units of formation rank or higher that have produced dinosaur body ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluewater Creek Formation
The Bluewater Creek Formation is a geologic formation in west-central New Mexico. It preserves fossils dating back to the late Triassic period. Description The formation consists of red sandstones and mudstones and has a total thickness in excess of . It conformably overlies the Shinarump Conglomerate and conformably underlies the Petrified Forest Formation. The formation has been correlated with the Salitral Formation of north-central New Mexico on the basis of its lithology, but it is likely somewhat younger, with an age around 219 million years. Fossils The formation contains some fossil vertebrates and an extensive fossil flora. Fossil tetrapods from the Bluewater Creek Formation include the theropod dinosaur ''Camposaurus'', phytosaur ''Rutiodon'', the aetosaurs ''Desmatosuchus'' and ''Stagonolepis'', and the metoposaurid ''Anaschisma''. These are characteristic of the late Carnian. History of investigation Spencer G. Lucas and S.N. Hayden defined the Bluewater Creek Mem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apachesaurus
''Apachesaurus'' is an extinct genus of metoposaurid temnospondyl amphibian from western North America. Description and taxonomy ''Apachesaurus'' was described from the Late Triassic (late Norian-Rhaetian The Rhaetian is the latest age of the Triassic Period (in geochronology) or the uppermost stage of the Triassic System (in chronostratigraphy). It was preceded by the Norian and succeeded by the Hettangian (the lowermost stage or earliest age ...) Redonda Formation of eastern New Mexico as a small, diminutive genus of metoposaurid. The small elongate centra were used by Hunt (1993) to consider ''Apachesaurus'' a small species of metoposaurid. However, Gee ''et al.'' (2017, 2018) demonstrated that centra referred to ''Apachesaurus'' are juveniles rather than small adults, concluding that ''Apachesaurus'' specimens are juveniles, though they cautioned they could not determine whether these are ''Anaschisma'' or a distinct taxon in its own right.Gee, B.M., and Parker, W.G. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Oxford Formation
The New Oxford Formation is a mapped bedrock unit consisting primarily of sandstones, conglomerates, and shales. The New Oxford Formation was first described in Adams County, Pennsylvania in 1929, and over the following decade was mapped in adjacent York County, PennsylvaniaStose, G.W., and Jonas, A.I., 1939, Geology and mineral resources of York County, Pennsylvania: Pennsylvania Geological Survey County Report, 4th series, no. 67, 199 p. and Frederick County, Maryland.Jonas, A.I., and Stose, G.W., 1938, Geologic map of Frederick County and adjacent parts of Washington and Carroll Counties (Maryland): Maryland Geological Survey County Geologic Map, 1 sheet, scale 1:62,500 It was described as "red shale and sandstone with beds of micaceous sandstone, arkose, and conglomerate." The majority of this early mapping was done by George Willis Stose, Anna Isabel Jonas, and Florence Bascom. Depositional Environment The New Oxford Formation and other formations of the Newark Supergroup we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eupelor
''Eupelor'' is a dubious genus of prehistoric amphibian belonging to the temnospondyl family Metoposauridae. Fossils have been found in present-day Pennsylvania, within the Newark Supergroup, dating to the Late Triassic ( Norian). Taxonomy The ''Eupelor'' type species, ''E. durus'', was named ''Mastodonsaurus durus'' by Edward Drinker Cope in 1866 on the basis of AMNH 3927, a number of clavicles and the tooth AMNH 2333 (which could have belonged to a different temnospondyl apart from ''Eupelor''), from the Lockatong Formation (Phoenixville Tunnel site) of Phoenixville, Pennsylvania Phoenixville is a borough in Chester County, Pennsylvania, United States. It is located northwest of Philadelphia at the junction of French Creek and the Schuylkill River. It is in the Philadelphia metropolitan area. The population is 18,616 .... In 1868 Cope allocated the species to its own genus, ''Eupelor'', based on differences from ''Metoposaurus'' (then known as ''Metopias''). Colbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tecovas Formation
The Tecovas Formation is a geological formation in Texas.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. . Vertebrate fauna See also * List of dinosaur-bearing rock formations This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented. Containing body fossils * List of stratigraphic units with dinosaur body fossils ** List of stratigraphic units with few ... References {{Reflist Carnian Stage Triassic geology of Texas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buettnererpeton
''Buettnererpeton'' is an extinct genus of large temnospondyl amphibians known from the Late Triassic Dockum Group in Texas. The type species, ''B. bakeri'', was long classified as part of other genera, such as ''Metoposaurus'' and ''Koskinonodon ''Anaschisma'' is an extinct genus of large temnospondyl amphibians. These animals were part of the family called Metoposauridae, which filled the crocodile-like predatory niches in the late Triassic. It had large skull about long, and possi ...'', but was placed in its own genus in 2022. References {{Reflist Prehistoric amphibian genera Triassic temnospondyls of North America Trematosaurs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anterior
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. Additionally, for some animals such as invertebrates, some terms may not have any meaning at all; for example, an animal that is radially symmetrical will have no anterior surface, but can still have a description that a part is close to the middle ("proximal") or further from the middle ("distal"). International organisations have determined vocabularies that are often used as standard vocabularies for subdisciplines of anatomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lacrimal Bone
The lacrimal bone is a small and fragile bone of the facial skeleton; it is roughly the size of the little fingernail. It is situated at the front part of the medial wall of the orbit. It has two surfaces and four borders. Several bony landmarks of the lacrimal bone function in the process of lacrimation or crying. Specifically, the lacrimal bone helps form the nasolacrimal canal necessary for tear translocation. A depression on the anterior inferior portion of the bone, the lacrimal fossa, houses the membranous lacrimal sac. Tears or lacrimal fluid, from the lacrimal glands, collect in this sac during excessive lacrimation. The fluid then flows through the nasolacrimal duct and into the nasopharynx. This drainage results in what is commonly referred to a runny nose during excessive crying or tear production. Injury or fracture of the lacrimal bone can result in posttraumatic obstruction of the lacrimal pathways. Structure Lateral or orbital surface The lateral or orbital surface i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
