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Kannemeyeriidae
Kannemeyeriiformes is a group of large-bodied Triassic dicynodonts. As a clade, Kannemeyeriiformes has been defined to include the species '' Kannemeyeria simocephalus'' and all dicynodonts more closely related to it than to the species '' Lystrosaurus murrayi''. Evolutionary history Despite being the most species-rich group of dicynodonts in the Triassic Period, kannemeyeriiforms exhibit much less diversity in terms of their anatomy and ecological roles than the dicynodonts from the Permian Period. Lystrosauridae is thought to be the most closely related group (sister taxon) to Kannemeyeriiformes, and since the earliest lystrosaurids are known from the Late Permian, the divergence of these two groups must have occurred at least as far back as this time, implying that a long ghost lineage must exist. Although no kannemeyeriiforms have been found in the Late Permian yet, the recent discovery of '' Sungeodon'' helps fill a gap in the early fossil record of the group by showing th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wadiasaurus
''Wadiasaurus'' (Wadia is of Islamic origin and means "guardianship," and "sauros" means lizard) is an extinct genus of dicynodont from the family Kannemeyeria, that lived in herds from the early to Middle Triassic. Substantial fossorial evidence of ''W. indicus'' was recovered from Yerrapalli Formation of the Pranhita-Godavari valley, India, and it is so far the only Kannemeyeriid known for certain from India. The Kannemeyeriiformes underwent a significant diversification during the middle Triassic, with roughly 40 known species distributed worldwide. All Kannemeyeriiformes were medium to large bodied, graviportal herbivores with relatively erect posture and gait. ''Wadiasaurus indicus'' is currently the only known species of ''Wadiasaurus''. Discovery ''Wadiasaurus indicus'' is represented by a collection of well-preserved fossil material recovered from the Yerrapalli formation in India. In a single bone bed, at least 700 cranial and postcranial elements amounting to more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicynodont
Dicynodontia is an extinct clade of anomodonts, an extinct type of non-mammalian therapsid. Dicynodonts were herbivores that typically bore a pair of tusks, hence their name, which means 'two dog tooth'. Members of the group possessed a horny, typically toothless beak, unique amongst all synapsids. Dicynodonts first appeared in Southern Pangaea during the mid-Permian, ca. 270–260 million years ago, and became globally distributed and the dominant herbivorous animals in the Late Permian, ca. 260–252 Mya. They were devastated by the end-Permian Extinction that wiped out most other therapsids ca. 252 Mya. They rebounded during the Triassic but died out towards the end of that period. They were the most successful and diverse of the non-mammalian therapsids, with over 80-90 genera known, varying from rat-sized burrowers to elephant-sized browsers. Characteristics The dicynodont skull is highly specialised, light but strong, with the synapsid temporal openings at the rear o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic
The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is the first and shortest period of the Mesozoic Era and the seventh period of the Phanerozoic Eon. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Repelinosaurus
''Repelinosaurus'' is an extinct genus of dicynodont from the Purple Claystone Formation of Luang Prabang in Laos, Southeast Asia that lived at around the time of the Permian-Triassic boundary and possibly dates to the earliest Early Triassic. Its Type species, type and only known species is ''R. robustus''. ''Repelinosaurus'' was originally described as the earliest known Kannemeyeriiformes, kannemeyeriiform dicynodont, supporting the idea of a more rapid radiation of the Triassic kannemeyeriiform dicynodonts during the Early Triassic following the Permian mass extinction. However, it may alternatively be more closely related to the Permian ''Dicynodon''. The discovery of a potential early kannemeyeriiform in an understudied locality like Laos highlights the importance of such places in dicynodont research, which has been largely focused on historically important localities such as the Karoo Basin of South Africa. Description ''Repelinosaurus'' was a medium-sized dicynodont (larg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rechnisaurus
''Rechnisaurus'' is an extinct genus of dicynodont from the Middle Triassic (Anisian) Yerrapalli Formation of India. It contains a single species, ''Rechnisaurus cristarhynchus''. History ''Rechnisaurus'' has had a long history of confusion with the far more widespread dicynodont '' Kannemeyeria''. ''Rechnisaurus cristarhynchus'' was originally described as a new genus and species in 1970, on the basis of fossils from India. Later in the 1970s, additional specimens were found in Africa (namely the Ntawere Formation of Zambia and the Omingonde Formation of Namibia) and referred to the species. These African fossils were noted to be very similar to ''Kannemeyeria'', so ''Rechnisaurus'' was renamed as a species of ''Kannemeyeria'', ''Kannemeyeria cristarhynchus''. However, in 1989 the original Indian fossils were re-compared to ''Kannemeyeria'' and found to be distinct, so ''Rechnisaurus'' was re-established in a more restricted sense including only the Indian fossils. The Afri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rabidosaurus
''Rabidosaurus'' is an extinct genus of large herbivorous dicynodont of the family Kannemeyeriidae from the Anisian Donguz Formation, Russia. See also * List of therapsids This list of therapsids is an attempt to create a comprehensive listing of all Genus, genera that have ever been included in the Therapsida excluding mammals and purely vernacular terms. The list includes all commonly accepted genera, but also gene ... Kannemeyeriiformes Anisian life Middle Triassic synapsids of Asia Triassic Russia Fossils of Russia Fossil taxa described in 1970 {{anomodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolichuranus
''Dolichuranus'' is an extinct genus of dicynodont therapsids from the Middle Triassic Omingonde Formation of Namibia and the Ntawere Formation of Zambia. Phylogeny ''Dolichuranus'' in a cladogram after Szczygielski & Sulej (2023): See also * List of therapsids This list of therapsids is an attempt to create a comprehensive listing of all Genus, genera that have ever been included in the Therapsida excluding mammals and purely vernacular terms. The list includes all commonly accepted genera, but also gene ... References * ''Chinese Fossil Vertebrates'' by Spencer G. Lucas Further reading * Kannemeyeriiformes Anisian life Middle Triassic synapsids of Africa Triassic Namibia Fossils of Namibia Omingonde Formation Fossils of Zambia Fossil taxa described in 1973 Anomodont genera {{anomodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinodontosaurus
''Dinodontosaurus'' (meaning "terrible-toothed lizard") is a genus of dicynodont therapsid. It was medium to large dicynodont of the Triassic (with skull up to long) and had a beak corneum. It lived in the Middle Triassic but disappeared in the Upper Triassic. Species * ''Dinodontosaurus tener'' is the most common species of dicynodont that existed in the Middle Triassic, and more common in the fossil layers that age in Rio Grande do Sul, in Rota Paleontológica. They are found mainly in the Paleontological Site Chiniquá in São Pedro do Sul and Candelária, where a group of ten pups were found together, demonstrating that these animals had strategies for coexistence in a group and caring for their offspring. ''Diodontosaurus pedroanum'' Tupi-Caldas, 1936 and ''Dinodontosaurus oliveirai'', Romer 1943 are synonyms. * ''Dinodontosaurus brevirostris'' is known from skeleton remains and a coprolite animal latrine [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ghost Lineage
A ghost lineage is a hypothesized ancestor in a species lineage that has left no fossil evidence, but can still be inferred to exist or have existed because of gaps in the fossil record or genomic evidence. The process of determining a ghost lineage relies on fossilized evidence before and after the hypothetical existence of the lineage and extrapolating relationships between organisms based on phylogenetic analysis. Ghost lineages assume unseen diversity in the fossil record and serve as predictions for what the fossil record could eventually yield; these hypotheses can be tested by unearthing new fossils or running phylogenetic analyses. Ghost lineages and Lazarus taxa are related concepts, as both stem from gaps in the fossil record. A ghost lineage is any gap in a taxon's fossil record, with or without reappearance, while a Lazarus taxon is a type of ghost lineage wherein a species is believed to have gone extinct due to an absence of it in the fossil record, but then reappea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Permian
Late or LATE may refer to: Everyday usage * Tardy, or late, not being on time * Late (or the late) may refer to a person who is dead Music * ''Late'' (The 77s album), 2000 * Late (Alvin Batiste album), 1993 * Late!, a pseudonym used by Dave Grohl on his '' Pocketwatch'' album * Late (rapper), an underground rapper from Wolverhampton * "Late", a song by Kanye West from ''Late Registration'' Other uses * Late (Tonga), an uninhabited volcanic island southwest of Vavau in the kingdom of Tonga * "Late" (''The Handmaid's Tale''), a television episode * LaTe, Oy Laivateollisuus Ab, a defunct shipbuilding company * Limbic-predominant age-related TDP-43 encephalopathy, a proposed form of dementia * Local-authority trading enterprise, a New Zealand business law * Local average treatment effect, a concept in econometrics * Late, a synonym for ''cooler'' in stellar classification See also * * * ''Lates'', a genus of fish in the lates perch family * Later (other) Later may ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sungeodon
''Sungeodon'' is an extinct genus of dicynodont therapsid from the Early Triassic of China. It is known from a single type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ..., ''Sungeodon kimkraemerae'', which was named in 2014. ''Sungeodon'' is the earliest member of a group of dicynodonts called Kannemeyeriiformes, which would radiate later in the Triassic to become the dominant large herbivores of terrestrial ecosystems. Before its discovery no kannemeyeriiform dicynodonts were known from the Early Triassic. The presence of ''Sungeodon'' in the earliest Triassic Jiucaiyuan Formation indicates that dicynodonts diversified soon after the Permian-Triassic extinction event, mirroring the explosive radiations of other tetrapod groups such as archosaurs soon after the extinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
