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Aleodon
''Aleodon'' is an extinct genus of cynodonts that lived from the Middle to the Late Triassic. Relatively few analyses have been conducted to identify the phylogenetic placement of ''Aleodon'', however those that have place ''Aleodon'' as a sister taxon to ''Chiniquodon''. Two species of ''Aleodon'' are recognized: ''A. brachyramphus'' which was discovered in Tanzania, and ''A. cromptoni'' which was discovered most recently in Brazil. The name for the genus ''Aleodon'' was created when Alfred W. "Fuzz" Crompton initially discovered the type species, ''Aleodon brachyramphus''. The genus name, "Aleodon" referred to the grinding nature of the postcanine teeth, while "brachyramphus" referred to the relatively short snout of the specimen. The most recently discovered species, ''A. cromptoni'' was named after Crompton. Discovery and Classification In 1955, ''Aleodon'' was initially classified as a gomphodont cynodont based on the partial skull and lower jaw fossils found in 1933 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleodon Skull Lateral
''Aleodon'' is an extinct genus of cynodonts that lived from the Middle to the Late Triassic. Relatively few analyses have been conducted to identify the Phylogenetics, phylogenetic placement of ''Aleodon'', however those that have place ''Aleodon'' as a sister taxon to ''Chiniquodon''. Two species of ''Aleodon'' are recognized: ''A. brachyramphus'' which was discovered in Tanzania, and ''A. cromptoni'' which was discovered most recently in Brazil. The name for the genus ''Aleodon'' was created when Alfred W. Crompton, Alfred W. "Fuzz" Crompton initially discovered the type species, ''Aleodon brachyramphus''. The genus name, "Aleodon" referred to the grinding nature of the postcanine teeth, while "brachyramphus" referred to the relatively short snout of the specimen. The most recently discovered species, ''A. cromptoni'' was named after Crompton. Discovery and Classification In 1955, ''Aleodon'' was initially classified as a Gomphodontia, gomphodont cynodont based on the partia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleodon Lower Jaw
''Aleodon'' is an extinct genus of cynodonts that lived from the Middle to the Late Triassic. Relatively few analyses have been conducted to identify the phylogenetic placement of ''Aleodon'', however those that have place ''Aleodon'' as a sister taxon to ''Chiniquodon''. Two species of ''Aleodon'' are recognized: ''A. brachyramphus'' which was discovered in Tanzania, and ''A. cromptoni'' which was discovered most recently in Brazil. The name for the genus ''Aleodon'' was created when Alfred W. "Fuzz" Crompton initially discovered the type species, ''Aleodon brachyramphus''. The genus name, "Aleodon" referred to the grinding nature of the postcanine teeth, while "brachyramphus" referred to the relatively short snout of the specimen. The most recently discovered species, ''A. cromptoni'' was named after Crompton. Discovery and Classification In 1955, ''Aleodon'' was initially classified as a gomphodont cynodont based on the partial skull and lower jaw fossils found in 1933 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manda Formation
The Manda Formation (also known as the Manda Beds) is a Middle Triassic (Anisian?) or possibly Late Triassic (Carnian?) geologic formation in Tanzania. It preserves fossils of many terrestrial vertebrates from the Triassic, including some of the earliest dinosauromorph archosaurs. The formation is often considered to be Anisian in age according to general tetrapod biochronology hypotheses and correlations to the ''Cynognathus'' Assemblage Zone of South Africa. However, some recent studies cast doubt to this age, suggesting that parts deposits may actually be younger (Carnian) in age. History of study One of the first to study rocks of the Manda Formation was British geologist G. M. Stockley. In 1932, Stockley explored the geology of the Ruhuhu Basin in Tanzania. He called a series of layers dating from the Late Carboniferous to the Middle Triassic the Songea Series and divided it into eight units labelled K1-K8. Stockley was also the first to describe fossils from these rocks, n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiniquodontidae
Chiniquodontidae is an extinct family of basal probainognathian cynodonts that lived in what is now Africa and South America during the Middle and Late Triassic. It is currently thought to include two valid genera: '' Aleodon'' and ''Chiniquodon ''Chiniquodon'' is an extinct genus of carnivorous cynodonts, which lived during the Late Triassic (Carnian) in South America (Argentina and Brazil) and Africa (Namibia and Madagascar). ''Chiniquodon'' was closely related to the genus '' Aleodo ...''. Two additional genera (''Belesodon'' and ''Probelesodon'') are usually regarded as junior synonyms of ''Chiniquodon''. References Prehistoric probainognathians Prehistoric therapsid families Taxa named by Friedrich von Huene {{paleo-therapsid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omingonde Formation
The Omingonde Formation is an Early Triassic, Early to Middle Triassic (Anisian to Ladinian) geologic Formation (geology), formation, part of the Karoo Supergroup, in the western Otjozondjupa Region and northeastern Erongo Region of north-central Namibia. The formation has a maximum thickness of about and comprises sandstones, shales, siltstones and conglomerate (geology), conglomerates, was deposited in a fluvial depositional environment, environment, alternating between a meandering river, meandering and braided river setting. The Omingonde Formation is correlated with a series of formations in northwestern Argentina and the Paraná Basin in southeastern Brazil, deposited in a larger basinal area, 120 million years before the break-up of Pangea. The formation has provided fossils of several therapsids, amphibians and ichnofossils and belongs to the Cynognathus Assemblage Zone, ''Cynognathus'' Assemblage Zone. The Omingonde Formation preserves the most diverse fauna of Middle Tria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiniquodon
''Chiniquodon'' is an extinct genus of carnivorous cynodonts, which lived during the Late Triassic (Carnian) in South America (Argentina and Brazil) and Africa (Namibia and Madagascar). ''Chiniquodon'' was closely related to the genus '' Aleodon'', and close to the ancestry of mammals. Other contemporaries included early dinosaurs. As both groups filled a similar ecological niche, fairly large therapsid hunters such as ''Chiniquodon'' may have been outcompeted by dinosaurs. Classification ''Chiniquodon theotonicus'', the type species, is from the Santa Maria Formation, Brazil and Chañares Formation, Ischigualasto-Villa Unión Basin, northwestern Argentina. This species is known from a number of skulls. The holotype is in the paleontological collection at Tübingen University, Germany. ''Chiniquodon sanjuanensis'' is from the Cancha de Bochas Member of the Ischigualasto Formation, Ischigualasto-Villa Unión Basin, northwestern Argentina. It was originally assigned to the ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cromptodon
''Cromptodon'' is an extinct genus of cynodonts from the Triassic of Cerro Bayo de Portrerillos, Cerro de las Cabras Formation, Argentina, South America. It is known only from PVL 3858, a mandible. Description The skull has been estimated to have a length of . The morphology and distribution of the cups on the postcanines is considered to be very similar to ''Thrinaxodon liorhinus'' differing in the fact that the cingulum is lingually wider. The coronoid, prearticular and angular processes, Bonaparte considered, were more developed than those in ''Thrinaxodon'', being more similar to ''Tribolodon'' (now ''Bolotridon''). The lower postcanines are buccolingually expanded. Classification Bonaparte originally classified ''Cromptodon'' as a galesaurid. In 1991, J. A. Hopson, pointed out a resemblance between the teeth of ''Cromptodon'' and juvenile ''Aleodon'' and reclassified ''Cromptodon'' as a chiniquodontid Chiniquodontidae is an extinct family of basal probainognathian c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cynodont
The cynodonts () (clade Cynodontia) are a clade of eutheriodont therapsids that first appeared in the Late Permian (approximately 260 mya), and extensively diversified after the Permian–Triassic extinction event. Cynodonts had a wide variety of lifestyles, including carnivory and herbivory. Mammals are cynodonts, as are their extinct ancestors and close relatives, having evolved from advanced probainognathian cynodonts during the Late Triassic. All other cynodont lines went extinct, with the last known non-mammalian cynodont group, the Tritylodontidae, having its youngest records in the Early Cretaceous. Description Early cynodonts have many of the skeletal characteristics of mammals. The teeth were fully differentiated and the braincase bulged at the back of the head. Outside of some crown-group mammals (notably the therians), all cynodonts probably laid eggs. The temporal fenestrae were much larger than those of their ancestors, and the widening of the zygomatic arch in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils Of Tanzania
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic Tanzania
The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. 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 chief terrestrial vertebrates during this time. A specialized subgroup of archosaurs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils Of Brazil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Probainognathians
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
