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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'' * †'' Palatobaena'' * †'' Peckemys'' * †''Plesiobaena ''Plesiobaena'' is an extinct genus of turtle which existed in the Belly River Formation, Canada duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palatobaena
''Palatobaena'' is an extinct genus of baenid turtle. It was first named by Gaffney in 1972 and the type species is ''Palatobaena bairdi''. It based on a fragmentary skull from the Fort Union Formation of the Bighorn Basin of Wyoming. The two other species are ''P. gaffneyi'' (a complete skull from Eocene (Wasatchian North American Land Mammal Age)) and ''P. cohen'' which existed in Hell Creek Formation, North Dakota during the late Cretaceous period (Maastrichtian The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from ... age). References Baenidae Prehistoric turtle genera Late Cretaceous turtles Paleocene turtles Eocene turtles Prehistoric turtles of North America Hell Creek fauna Fossil taxa described in 1972 Taxa named by Eugene S. Gaffney {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamerabaena
''Gamerabaena'' is an extinct genus of baenid turtle which existed in North Dakota during the late Cretaceous Period. It is known from a single fragmentary skull that was found in the Maastrichtian-age Hell Creek Formation. It contains the species ''Gamerabaena sonsalla''. ''Gamerabaena'' is similar to the genus '' Palatobaena'', but it differs in its lack of a posterior expansion of the triturating (or chewing) surface, a somewhat rectangular skull, and a wide angle between the maxillae. ''Gamerabaena'' also has a lingual ridge on the inner side of the jaw that is not seen in ''Palatobaena''. ''Gamerabaena'' is considered the sister taxon of ''Palatobaena'' and shares features with both ''Palatobaena'' and '' Plesiobaena''. These features, which include slightly upturned eye sockets, are seen as intermediate between the two other genera. While ''Gamerabaena'' is known only from the skull, it may belong to the same species as ''"Baena" hayi'', which is known primarily from the sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arvinachelys
''Arvinachelys goldeni'' is an extinct baenid turtle from the Late Cretaceous of Utah. ''A. goldeni'' is notable among turtles for the presence of two nasal openings instead of one, giving it a vaguely pig-nosed appearance in life. Description The holotype, UMNH VP 21151, is a largely completed skeleton, including the shell and skull, belonging to an animal about 60 centimeters long. Remains previously ascribed to other baenid turtles are now recognised to belong to the animal. Phylogenetics ''Arvinachelys'' bears most of the synapomorphies characteristic of Baenidae. It is described as a sister taxon to '' Hayemys''; given the latter's position as a lazarus taxon basal to the rest of Baenidae, ''Arvinachelys''' discovery extends its branch of the family tree back into the Campanian. However, ''Arvinachelys''' discovery may indicate that a reevaluation of Baenidae as a whole is necessary, as several remains from the region have been reassigned to this genus. Biology ''Arvina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 originally placed within the monotypic family Neurankylidae, but it has since been placed in the Neurankylinae, alongside '' Trinitichelys''. The type species, ''Neurankylus eximius'', was described by Lawrence Lambe in 1902. The species ''N. lithographicus'' was discovered in the Milk River Formation (Canada), alongside the holotype of the pachycephalosaurid dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is t ... '' Acrotholus audeti''. References {{Taxonbar, from1=Q73170070 Baenidae Cretaceous turtles Paleocene turtles Cretaceous reptiles of North America Paleocene reptiles of North America Hell Creek fauna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Cretac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cedrobaena
''Cedrobaena'' is an extinct genus of turtle which existed in the Tiffanian Cedar Point Quarry, Wyoming and in the latest Maastrichtian Hell Creek Formation, United States. It was first named by Tyler R. Lyson and Walter G. Joyce in 2009 and the type species is ''Cedrobaena putorius''. References * ''Cedrobaena''at the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ... Baenidae Prehistoric turtle genera Late Cretaceous turtles of North America Paleocene turtles Cenozoic turtles of North America Hell Creek fauna Fossil taxa described in 2009 {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peckemys
''Peckemys'' is an extinct genus of baenid turtle which existed in the Hell Creek Formation, United States during the late Cretaceous period (Maastrichtian The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from ... age). It was first named by Tyler R. Lyson and Walter G. Joyce in 2009 and the type species is ''Peckemys brinkman''. References Baenidae Prehistoric turtle genera Late Cretaceous turtles of North America Hell Creek fauna Fossil taxa described in 2009 {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baena Arenosa
''Baena'' is an extinct genus of baenid turtles. Fossils of ''Baena'' have been found in locations including Kirtland Formation, Campanian New Mexico (''B.'' sp.) (Cretaceous) and Ravenscrag Formation, Maastrichtian Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ... (''B.'' sp.) (Cretaceous). References Baenidae Prehistoric turtle genera {{Paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plesiobaena
''Plesiobaena'' is an extinct genus of turtle which existed in the Belly River Formation, Canada during the late Cretaceous period (Campanian age). It was first named by Lawrence Lambe Lawrence Morris Lambe (August 27, 1863 – March 12, 1919) was a Canadian geologist, palaeontologist, and ecologist from the Geological Survey of Canada (GSC). His published work, describing the diverse and plentiful dinosaur discoveries from th ... in 1902 and the type species is ''Plesiobaena antiqua''. References Baenidae Prehistoric turtle genera Late Cretaceous turtles of North America Hell Creek fauna Laramie Formation Fossil taxa described in 1902 Taxa named by Lawrence Lambe {{paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baena (genus)
''Baena'' is an extinct genus of baenid turtles. Fossils of ''Baena'' have been found in locations including Kirtland Formation, Campanian New Mexico (''B.'' sp.) (Cretaceous) and Ravenscrag Formation, Maastrichtian Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ... (''B.'' sp.) (Cretaceous). References Baenidae Prehistoric turtle genera {{Paleo-turtle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chisternon
''Chisternon'' is a genus of baenid turtles from the Eocene of North America. References *''The Osteology of the Reptiles'' by Alfred Sherwood Romer External links''Chisternon''in the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ... 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] |
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 Caribbean Sea, and to the west and south by the Pacific Ocean. Because it is on the North American Plate, North American Tectonic Plate, Greenland is included as a part of North America geographically. North America covers an area of about , about 16.5% of Earth's land area and about 4.8% of its total surface. North America is the third-largest continent by area, following Asia and Africa, and the list of continents and continental subregions by population, fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 579 million people in List of sovereign states and dependent territories in North America, 23 independent states, or about 7.5% of the world's population. In Americas (terminology)#Human ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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