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Regisaurus
''Regisaurus'' ("Rex's lizard", named after its discoverer Francis Rex Parrington) is an extinct genus of small carnivorous therocephalian. It is known from a single described species, the type species ''Regisaurus jacobi'', from the Early Triassic Lystrosaurus Assemblage Zone of South Africa, although at least one undescribed species is also known. Description It was a rather derived baurioid, with a robust skull, short tail, long limbs and relatively large canines. It was apparently related to ''Urumchia'' and like ''Urumchia'', it had vomer bones, which form the secondary palate, but they do not narrow to a tip like in ''Urumchia''. However, it retained some primitive characteristics. It had six incisor teeth in each side of the jaw, whereas other baurioids had less. It was probably carnivorous, and ate insects and small vertebrates Discovery and species ''Regisaurus'' was discovered in 1964 by Francis Rex Parrington and it was named in 1972 by C. H. Mendrez. Two species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regisaurus Jacobi
''Regisaurus'' ("Rex's lizard", named after its discoverer Francis Rex Parrington) is an extinct genus of small carnivorous therocephalian. It is known from a single described species, the type species ''Regisaurus jacobi'', from the Early Triassic Lystrosaurus Assemblage Zone of South Africa, although at least one undescribed species is also known. Description It was a rather derived baurioid, with a robust skull, short tail, long limbs and relatively large canines. It was apparently related to ''Urumchia'' and like ''Urumchia'', it had vomer bones, which form the secondary palate, but they do not narrow to a tip like in ''Urumchia''. However, it retained some primitive characteristics. It had six incisor teeth in each side of the jaw, whereas other baurioids had less. It was probably carnivorous, and ate insects and small vertebrates Discovery and species ''Regisaurus'' was discovered in 1964 by Francis Rex Parrington and it was named in 1972 by C. H. Mendrez. Two species ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baurioidea
Baurioidea is a superfamily of therocephalian therapsids. It includes advanced therocephalians such as ''Regisaurus'' and ''Bauria''. The superfamily was named by South African paleontologist Robert Broom in 1911. Bauriamorpha, named by D. M. S. Watson and Alfred Romer in 1956, is a junior synonym of Baurioidea. Many baurioids were once placed in a group called Scaloposauria. Scaloposaurs were characterized by their small size and reduced postorbital bar (a strut of bone behind the eye socket). Scaloposauria is no longer recognized as a valid taxon because it likely represents juvenile forms of many groups of therocephalians. Most scaloposaurs, including '' Scaloposaurus'' and ''Regisaurus'', are now classified in various positions within Bauroidea. Many therocephalians once classified as scaloposaurians are now considered basal baurioids. The classification of these species is uncertain, as there have been no comprehensive phylogenetic analyses of scaloposaurian taxa. The v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1972 In Paleontology
Bryophytes Mollusca Bivalves Archosauromorphs Newly named archosauromorphs Newly named pseudosuchians Newly named dinosauriforms Newly named dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Newly named birds Synapsids Newly named therapsids References {{portal, Paleontology Paleontology Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ... Paleontology 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regisauridae
Regisauridae is an extinct family of small carnivorous theriodonts from the Late Permian and Early Triassic of South Africa and China. Classification Below is a cladogram modified from analysis published by Adam K. Huttenlocker in 2014. References {{Taxonbar, from=Q19760200 Baurioids Lopingian first appearances Early Triassic extinctions Prehistoric therapsid families ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycideops Longiceps
''Lycideops'' is an extinct genus of therocephalians from the Late Permian of South Africa. The type species is ''Lycideops longiceps'', named in 1931 by South African paleontologist Robert Broom. Fossils of ''Lycideops'' come from the ''Dicynodon'' Assemblage Zone of the Beaufort Group. ''Lycideops'' is a member of the family Lycideopidae. Like other lycideopids, ''Lycideops'' has a long snout. Phylogeny ''Lycideops'' has been included in several phylogenetic analyses, including those of Huttenlocker (2009), Huttenlocker ''et al.'' (2011), and Sigurdsen ''et al.'' (2012). All place ''Lycideops'' within the advanced therocephalian clade Baurioidea. Huttenlocker (2009) and Huttenlocker ''et al.'' (2011) found it to group with ''Regisaurus'' and '' Scaloposaurus'' as shown in the cladogram below: The analysis of Sigurdsen ''et al.'' (2012) came to a different result, grouping ''Lycideops'' with ''Tetracynodon'' and ''Choerosaurus''. The clade including these three genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urumchia Lii
''Urumchia'' is an extinct genus of therocephalian therapsids from the Early Triassic of China. The type species ''Urumchia lii'' was described by Chinese paleontologist C. C. Young (Yang Zhongjian) in 1952 from the Jiucaiyuan Formation in Xinjiang. The holotype skull has been lost, but Young was able to describe the species on the basis of a detailed cast of the skull. ''Urumchia'' is similar to the South African therocephalian ''Regisaurus'' in having an expanded pair of vomer The vomer (; lat, vomer, lit=ploughshare) is one of the unpaired facial bones of the skull. It is located in the midsagittal line, and articulates with the sphenoid, the ethmoid, the left and right palatine bones, and the left and right maxill ... bones on the underside of the skull that form a secondary palate. In ''Urumchia'' the front end of the vomers narrow to a point, while in ''Regisaurus'' they do not. ''Urumchia'' has six incisors on either side of the upper jaw, a primitive conditi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urumchia
''Urumchia'' is an extinct genus of therocephalian therapsids from the Early Triassic of China. The type species ''Urumchia lii'' was described by Chinese paleontologist C. C. Young (Yang Zhongjian) in 1952 from the Jiucaiyuan Formation in Xinjiang. The holotype skull has been lost, but Young was able to describe the species on the basis of a detailed cast of the skull. ''Urumchia'' is similar to the South African therocephalian ''Regisaurus'' in having an expanded pair of vomer bones on the underside of the skull that form a secondary palate. In ''Urumchia'' the front end of the vomers narrow to a point, while in ''Regisaurus'' they do not. ''Urumchia'' has six incisors on either side of the upper jaw, a primitive condition among baurioid Baurioidea is a superfamily of therocephalian therapsids. It includes advanced therocephalians such as ''Regisaurus'' and ''Bauria''. The superfamily was named by South African paleontologist Robert Broom in 1911. Bauriamorpha, named by D. M. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycideopidae
Lycideopidae is an extinct family of therocephalians from the Late Permian and Early Triassic The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between Ma and Ma (million years ago). Rocks from this epoch are collectively known as the Lower Triassic Series, which is a un ... of South Africa. Phylogeny Below is a cladogram from Sigurdsen ''et al.'' (2012): References Baurioids Lopingian first appearances Early Triassic extinctions Prehistoric therapsid families {{paleo-therapsid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Therocephalia
Therocephalia is an extinct suborder of eutheriodont therapsids (mammals and their close relatives) from the Permian and Triassic. The therocephalians ("beast-heads") are named after their large skulls, which, along with the structure of their teeth, suggest that they were carnivores. Like other non-mammalian synapsids, therocephalians were once described as "mammal-like reptiles". Therocephalia is the group most closely related to the cynodonts, which gave rise to the mammals. This relationship takes evidence in a variety of skeletal features. The fossils of therocephalians are numerous in the Karoo of South Africa, but have also been found in Russia, China, Tanzania, Zambia, and Antarctica. Early therocephalian fossils discovered in Middle Permian deposits of South Africa support a Gondwanan origin for the group, which seems to have spread quickly across Earth. Although almost every therocephalian lineage ended during the great Permian–Triassic extinction event, a few represe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Therocephalia
Therocephalia is an extinct suborder of eutheriodont therapsids (mammals and their close relatives) from the Permian and Triassic. The therocephalians ("beast-heads") are named after their large skulls, which, along with the structure of their teeth, suggest that they were carnivores. Like other non-mammalian synapsids, therocephalians were once described as "mammal-like reptiles". Therocephalia is the group most closely related to the cynodonts, which gave rise to the mammals. This relationship takes evidence in a variety of skeletal features. The fossils of therocephalians are numerous in the Karoo of South Africa, but have also been found in Russia, China, Tanzania, Zambia, and Antarctica. Early therocephalian fossils discovered in Middle Permian deposits of South Africa support a Gondwanan origin for the group, which seems to have spread quickly across Earth. Although almost every therocephalian lineage ended during the great Permian–Triassic extinction event, a few represe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karenitidae
''Karenites'' is an extinct genus of therocephalian therapsids from the Late Permian of Russia. The only species is ''Karenites ornamentatus'', named in 1995. Several fossil specimens are known from the town of Kotelnich in Kirov Oblast. Description ''Karenites'' is known from a partial holotype skeleton, two partial skulls, and isolated jaw bones. Although incomplete, the skulls preserve small and delicate structures like nasal turbinates on the inside of the skull and the stapes bone of the ear. The skull of ''Karenites'' is about long, with the snout much longer than the temporal region of the skull behind the eye sockets. Viewed from above, the skull is triangular. The snout is broad, and the skull widens toward the occiput or posterior margin. Two large holes behind the eye socket called temporal fenestrae occupy most of the posterior skull. Between these fenestra is a narrow sagittal crest. In front of this crest, the skull roof bones are weakly pitted with small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Undescribed Taxon
In taxonomy, an undescribed taxon is a taxon (for example, a species) that has been discovered, but not yet formally described and named. The various Nomenclature Codes specify the requirements for a new taxon to be validly described and named. Until such a description has been published, the taxon has no formal or official name, although a temporary, informal name is often used. A published scientific name may not fulfil the requirements of the Codes for various reasons. For example, if the taxon was not adequately described, its name is called a '' nomen nudum''. It is possible for a taxon to be "undescribed" for an extensive period of time, even if unofficial descriptions are published. An undescribed species may be referred to with the genus name, followed by "sp"., but this abbreviation is also used to label specimens or images that are too incomplete to be identified at the species level. In some cases, there is more than one undescribed species in a genus. In this case, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
