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Paracryptodira
__NOTOC__ Paracryptodira is an extinct group of reptiles in the clade Testudinata (which contains modern turtles and their extinct relatives), known from the Jurassic to Paleogene of North America and Europe. Initially treated as a suborder sister to Cryptodira,Gaffney (1975) they were then thought to be a very primitive lineage inside the Cryptodira according to the most common use of the latter taxon.Joyce (2007) They are now often regarded as late-diverging stem-turtles, lying outside the clade formed by Cryptodira and Pleurodira. The paracryptodires are said to have phylogenic relationships, noted as primary subclades, within the Baenidae and Pleurosternidae. Within each subclade, lies many biodiverse turtles that are continuously being investigated and added to the fossil record. Paracryptodires are divided into three main groups, Compsemydidae, known from the Late Jurassic to Paleocene of North America and Europe, Pleurosternidae, known from the Late Jurassic to Early Creta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compsemydidae
__NOTOC__ Paracryptodira is an extinct group of reptiles in the clade Testudinata (which contains modern turtles and their extinct relatives), known from the Jurassic to Paleogene of North America and Europe. Initially treated as a suborder sister to Cryptodira,Gaffney (1975) they were then thought to be a very primitive lineage inside the Cryptodira according to the most common use of the latter taxon.Joyce (2007) They are now often regarded as late-diverging stem-turtles, lying outside the clade formed by Cryptodira and Pleurodira. The paracryptodires are said to have phylogenic relationships, noted as primary subclades, within the Baenidae and Pleurosternidae. Within each subclade, lies many biodiverse turtles that are continuously being investigated and added to the fossil record. Paracryptodires are divided into three main groups, Compsemydidae, known from the Late Jurassic to Paleocene of North America and Europe, Pleurosternidae, known from the Late Jurassic to Early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compsemys
''Compsemys '' is an extinct genus of prehistoric turtles from the Late Cretaceous and Paleocene of North America and possibly Europe. The type species ''C. victa'', first described by Joseph Leidy from the Hell Creek Formation in Montana in 1856, and another probable species ''C. russelli'' (originally placed in the separate genus '' Berruchelus''), described in 2012, from Paleocene deposits in France''.'' Its affinites have long been uncertain, but it has recently been considered to be the most basal member of Paracryptodira, despite the clade first appearing in the Late Jurassic, and is sometimes included in its own family, Compsemydidae. A revision in 2020 found Compsemydidae to be more expansive, also containing '' Riodevemys'' and '' Selenemys'' from the Late Jurassic of Europe, and '' Peltochelys'' from the Early Cretaceous of Europe. ''Compsemys'' was a moderately sized turtle, up to long, with a carapace A carapace is a Dorsum (biology), dorsal (upper) section ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurosternidae
Pleurosternidae is an extinct family of freshwater turtles belonging to Paracryptodira. They are definitively known from the Late Jurassic to Early Cretaceous (Albian) of Western Europe and North America. Genera Valid taxa *''Dinochelys'' Morrison Formation, United States, Late Jurassic (Tithonian) *'' Dorsetochelys'' Purbeck Group, England, Early Cretaceous ( Berriasian) Bückeberg Formation, Germany, Berriasian *'' Glyptops'' Morrison Formation, United States, Late Jurassic (Tithonian) *'' Pleurosternon'' Purbeck Group, England, Early Cretaceous (Berriasian), Ágreda locality, Spain, Tithonian-Berriasian, France, Tithonian-Berriasian *'' Riodevemys'' Villar del Arzobispo Formation, Spain, Late Jurassic (Tithonian) *''Selenemys'' Lourinhã Formation, Portugal, Late Jurassic ( Kimmeridgian) *'' Toremys'' Escucha Formation, Spain, Early Cretaceous (Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the younges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kallokibotion
''Kallokibotion'' is an extinct genus of stem-turtle from the Upper Cretaceous ( Maastrichtian, 86–66 million years ago), known from fossils found in Romania. One species is known, ''Kallokibotion bajazidi'', which was named by Franz Nopcsa after his lover Bajazid Doda. It literally means beautiful box of Bajazid'''; Nopcsa chose the name because, in the words of British palaeontologist Gareth Dyke, "the shape of the shell reminded him of Bajazid's arse". A second undescribed species is known from the Santonian of Hungary. Description ''Kallokibotion'' reached in carapace length. There are jagged ornaments on its shell. Taxonomy A fossil of this turtle was mistakenly described as a pterosaur of the genus '' Thalassodromeus'' in 2014. In 1992, it was identified as a basal cryptodire, and as a meiolaniid in the early 2010's. Later phylogenetic analysis based on characters described from new specimens places ''Kallokibotion'' as the sister taxon of the crown testudines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsetochelys
''Dorsetochelys'' is an extinct genus of turtle from the Early Cretaceous of southern England and northwestern Germany. Taxonomy The type species, ''Dorsetochelys delairi'', was described on the basis of DORCM G.23, a complete skull from the Early Cretaceous (Berriasian) Purbeck Group of Dorset, England. Later, a turtle skull from the vicinity of Como Bluff, Wyoming, was described as a new species, ''D. buzzops'', in honor of Buzz Pitman, a museum director of the Rock River Museum near Como Bluff. However, a cladistic analysis conducted in 2013 recovered that species as a member of Baenidae, sister to '' Uluops''. In 2012, pleurosternid remains were described from the Early Cretaceous (Berriasian) Bückeberg Formation of Lower Saxony Lower Saxony (german: Niedersachsen ; nds, Neddersassen; stq, Läichsaksen) is a German state (') in northwestern Germany. It is the second-largest state by land area, with , and fourth-largest in population (8 million in 2021) among the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenemys
''Selenemys'' is an extinct genus of pleurosternid turtle from the Late Jurassic of Central West of Portugal. It is known from several specimens recovered from the Lusitanian Basin, dating to the upper Kimmeridgian age. It was one of the earliest European pleurosternids, more closely related to the later Cretaceous pleurosternids of Europe than the contemporary pleurosternids of North America. This genus was named by Adán Pérez-García and Francisco Ortega in 2011 File:2011 Events Collage.png, From top left, clockwise: a protester partaking in Occupy Wall Street heralds the beginning of the Occupy movement; protests against Libyan dictator Muammar Gaddafi, who was killed that October; a young man celebrate ..., and the type species is ''Selenemys lusitanica''. The holotype is housed at the Laboratory of Paleontology and Paleoecology of thALT-Society of Natural History(Torres Vedras, Portugal). References Pleurosternidae Prehistoric turtle genera Kimmeridgi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baenidae
Baenidae is an extinct family of paracryptodiran turtles known from the Early Cretaceous to Eocene of North America. While during the Early Cretaceous they are found across North America, during the Late Cretaceous they are only found in Laramidia, having disappeared from Appalachia. The majority of lineages survived the K-Pg Extinction, but the family was extinct by the latest Eocene. The name of the type genus, ''Baena,'' appears to be of Native American origin. They are primarily found in freshwater deposits, and are considered to be aquatic, with a largely generalist habit. Genera * †'' Arundelemys'' * †'' Arvinachelys'' * †''Baena'' * †'' Cedrobaena'' * †''Chisternon'' * †'' Edowa'' * †'' Gamerabaena'' * †'' Hayemys'' * †'' Lakotemys'' Lakota Formation, Berriasian-Valanginian * †''Neurankylus ''Neurankylus'' is an extinct genus of turtles in the family Baenidae that lived between 112 and 61 million years ago in Canada and the United States. It was o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turtle
Turtles are an order of reptiles known as Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked turtles), which differ in the way the head retracts. There are 360 living and recently extinct species of turtles, including land-dwelling tortoises and freshwater terrapins. They are found on most continents, some islands and, in the case of sea turtles, much of the ocean. Like other amniotes (reptiles, birds, and mammals) they breathe air and do not lay eggs underwater, although many species live in or around water. Turtle shells are made mostly of bone; the upper part is the domed carapace, while the underside is the flatter plastron or belly-plate. Its outer surface is covered in scales made of keratin, the material of hair, horns, and claws. The carapace bones develop from ribs that grow sideways and develop into broad flat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chisternon
''Chisternon'' is a genus of baenid turtles from the Eocene of North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car .... References *''The Osteology of the Reptiles'' by Alfred Sherwood Romer External links''Chisternon''in the Paleobiology Database Baenidae Prehistoric turtle genera Eocene turtles Eocene reptiles of North America Fossil taxa described in 1872 Taxa named by Joseph Leidy {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campanian
The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian spans the time from 83.6 (± 0.2) to 72.1 (± 0.2) million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian. The Campanian was an age when a worldwide sea level rise covered many coastal areas. The morphology of some of these areas has been preserved: it is an unconformity beneath a cover of marine sedimentary rocks. Etymology The Campanian was introduced in scientific literature by Henri Coquand in 1857. It is named after the French village of Champagne in the department of Charente-Maritime. The original type locality was a series of outcrop near the village of Aubeterre-sur-Dronne in the same region. Definition The base of the Campanian Stage is defined as a place in the stratigraphic col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinochelys
''Dinochelys'' (from Greek ''deinos'' -terrible- and ''chelys'' -turtle) is an extinct genus of paracryptodiran turtle from the Late Jurassic Morrison Formation The Morrison Formation is a distinctive sequence of Late Jurassic, Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandsto .... See also * Paleobiota of the Morrison Formation References Pleurosternidae Prehistoric turtle genera Late Jurassic turtles Late Jurassic reptiles of North America Morrison fauna Fossil taxa described in 1979 Taxa named by Eugene S. Gaffney {{Jurassic-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
