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Paralligatoridae
Paralligatoridae is an extinct family of neosuchian crocodyliforms that existed during the Jurassic and Cretaceous periods. It includes the genera ''Paralligator'', '' Brillanceausuchus'', '' Kansajsuchus'', ''Shamosuchus'', ''Scolomastax'', ''Sabresuchus'', '' Rugosuchus'', '' Batrachomimus'' and '' Wannchampsus'', as well as the yet-unnamed "Glen Rose form". Evolution Phylogenetic analyses of crocodyliforms find Paralligatoridae to nest within Neosuchia, a large clade (evolutionary grouping) that also includes modern crocodylians. In crocodyliform phylogeny, paralligatorids are usually found near the base of Neosuchia, outside the clade Eusuchia, which includes crocodylians and their closest relatives. Below is a cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to d ... from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batrachomimus Pastosbonensis
''Batrachomimus'' is an extinct genus of neosuchian Crocodyliformes, crocodyliform known from the Late Jurassic Pastos Bons Formation of northeastern Brazil. It contains a single species, ''Batrachomimus pastosbonensis'', with the Specific name (zoology), specific name referring to the formation, which was first described and named by Felipe C. Montefeltro, Hans C. E. Larsson, Marco A. G. de França and Max C. Langer in 2013 in paleontology, 2013. It is known from a nearly complete skull, osteoderms and limb bones. ''Batrachomimus'' belongs to the family Paralligatoridae and predates all other members of the family and its immediate sister group, Eusuchia, by 30 million years. Description ''Batrachomimus'' is known from a single holotype skull known as LPRP/USP-0617, which preserves most of the skull and lower jaws except for the skull table, braincase, and the left Temple (anatomy), temporal region. The skull is about , giving an estimated total body length of about . ''Batrachom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batrachomimus
''Batrachomimus'' is an extinct genus of neosuchian crocodyliform known from the Late Jurassic Pastos Bons Formation of northeastern Brazil. It contains a single species, ''Batrachomimus pastosbonensis'', with the specific name referring to the formation, which was first described and named by Felipe C. Montefeltro, Hans C. E. Larsson, Marco A. G. de França and Max C. Langer in 2013. It is known from a nearly complete skull, osteoderms and limb bones. ''Batrachomimus'' belongs to the family Paralligatoridae and predates all other members of the family and its immediate sister group, Eusuchia, by 30 million years. Description ''Batrachomimus'' is known from a single holotype skull known as LPRP/USP-0617, which preserves most of the skull and lower jaws except for the skull table, braincase, and the left temporal region. The skull is about , giving an estimated total body length of about . ''Batrachomimus'' has a narrow snout with wavy margins around the teeth. It is unique in hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shamosuchus
''Shamosuchus'' is an extinct genus of neosuchian crocodyliform that lived during the Late Cretaceous (Campanian) period in what is now the Djadokhta Formation of Mongolia, approximately 75 million to 71 million years ago. Paleobiology The eye and nasal openings were not raised above the skull as in modern crocodilians, so that the animal would have to raise its head completely out of the water to breathe. As this cranial morphology does not suit an ambush predator, it lends support to the idea of a diet of aquatic invertebrates. The teeth were adapted to crush bivalves, gastropods and other animals with a shell or exoskeleton. The genus was named in 1924 by Charles C. Mook. ''Shamosuchus'' reached up to in length. ''Paralligator'' was synonymized with ''Shamosuchus'' by several authors. However, recent cladistic analysis of Paralligatoridae Paralligatoridae is an extinct family of neosuchian crocodyliforms that existed during the Jurassic and Cretaceous periods. It inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yanjisuchus
''Yanjisuchus'' is an extinct genus of paralligatorid neosuchian known from the Early Cretaceous Longjing Formation of Guizhou, China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and .... It contains a single species, ''Y. longshanensis.'' References Early Cretaceous crocodylomorphs of Asia Fossil taxa described in 2021 {{Paleo-archosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kansajsuchus
''Kansajsuchus'' is an extinct genus of paralligatorid mesoeucrocodylian. It is based on PIN 2399/301, a right premaxilla, one of the bones of the tip of the snout. This specimen was found in rocks of the lower Santonian-age Upper Cretaceous Yalovach Svita of Kansai, in the Fergana Basin of Tajikistan. Additional fossils including vertebrae and bony armor have been assigned to this genus. It would have been a large animal, estimated at up to long. ''Kansajsuchus'' was described in 1975 by Mikhail Efimov. The type species is ''Kansajsuchus extensus''. Halliday ''et al.'' (2013) confirmed the validity of the species ''K. extensus'', and its phylogenetic position among other basal goniopholidids from Asia. '' "Sunosuchus" shartegensis'' was found to represent its sister taxon, and both species were placed in a distinct lineage from the type species of ''Sunosuchus'', '' S. miaoi'', however with a weak support. Therefore, the authors raised the suggestion that later revi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eusuchia
Eusuchia is a clade of crocodylomorphs that first appeared in the Early Cretaceous with ''Hylaeochampsa''. Along with Dyrosauridae and Sebecosuchia, they were the only crocodyliformes who survived the K-T extinction. Since the other two clades died out 47 and 11 million years ago respectively, all living crocodilian species are eusuchians, as are many extinct forms. Definition Eusuchia was originally defined by Thomas Henry Huxley in 1875 as an apomorphy-based group, meaning that it was defined by shared characteristics rather than relations. These characteristics include pterygoid-bounded choanae and vertebrae which are procoelous (concave from the front and convex from the back). The possibility that these traits may have been convergently evolved in different groups of neosuchians rather than one lineage spurred some modern paleontologists to revise the group's definition to make it defined solely by relations. In 1999, Christopher Brochu redefined Eusuchia as "the last common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabresuchus
''Sabresuchus'' is an extinct genus of neosuchian crocodyliform from the Cretaceous of Europe. The name is derived from 'Sabre' in reference to the enlarged and curved fifth maxillary tooth, and 'suchus' from the Ancient Greek for crocodile. Taxonomy Two valid species are currently recognized: ''Sabresuchus ibericus'' from eastern Spain, and ''Sabresuchus symplesiodon'' from Romania,. Both species were previously assigned under the genus ''Theriosuchus'', as ''T. ibericus'' and ''T. symplesiodon'' respectively. A 2016 cladistic analysis recovered it as a neosuchian more closely related to members of the family Paralligatoridae Paralligatoridae is an extinct family of neosuchian crocodyliforms that existed during the Jurassic and Cretaceous periods. It includes the genera ''Paralligator'', '' Brillanceausuchus'', '' Kansajsuchus'', ''Shamosuchus'', ''Scolomastax'', ''Sa ... than to atoposaurids. References Neosuchians Crocodyliforms Cretaceous Romania Fossils of Rom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scolomastax
''Scolomastax'' is an extinct genus of paralligatorid neosuchian known from the Late Cretaceous Woodbine Formation in Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 .... It contains a single species, ''S. sahlsteini''. References {{Neosuchia, N. Crocodylomorphs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neosuchia
Neosuchia is a clade within Mesoeucrocodylia that includes all modern extant crocodilians and their closest fossil relatives. It is defined as the most inclusive clade containing all crocodylomorphs more closely related to ''Crocodylus niloticus'' (the Nile Crocodile) than to ''Notosuchus terrestris''. Members of Neosuchia generally share a crocodilian-like bodyform adapted to freshwater aquatic life, as opposed to the terrestrial habits of more basal crocodylomorph groups. The earliest neosuchian is suggested to be the Early Jurassic ''Calsoyasuchus'', which lived during the Sinemurian and Pliensbachian stages in North America. It is often identified as a member of Goniopholididae, though this is disputed, and the taxon may lie outside Neosuchia, which places the earliest records of the group in the Middle Jurassic. Characteristics A tooth notch between the maxilla and premaxilla is a basal characteristic of the Neosuchia, although it is lost in some more derived forms, most nota ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarsomordeo
''Tarsomordeo'' is an extinct genus of paralligatorid neosuchian known from the Early Cretaceous Twin Mountains Formation in Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 .... It contains a single species, ''T. winkleri.'' References {{Neosuchia, N. Crocodylomorphs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neosuchia
Neosuchia is a clade within Mesoeucrocodylia that includes all modern extant crocodilians and their closest fossil relatives. It is defined as the most inclusive clade containing all crocodylomorphs more closely related to ''Crocodylus niloticus'' (the Nile Crocodile) than to ''Notosuchus terrestris''. Members of Neosuchia generally share a crocodilian-like bodyform adapted to freshwater aquatic life, as opposed to the terrestrial habits of more basal crocodylomorph groups. The earliest neosuchian is suggested to be the Early Jurassic ''Calsoyasuchus'', which lived during the Sinemurian and Pliensbachian stages in North America. It is often identified as a member of Goniopholididae, though this is disputed, and the taxon may lie outside Neosuchia, which places the earliest records of the group in the Middle Jurassic. Characteristics A tooth notch between the maxilla and premaxilla is a basal characteristic of the Neosuchia, although it is lost in some more derived forms, most nota ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocodylia
Crocodilia (or Crocodylia, both ) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 95 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era. The order Crocodilia includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term 'crocodiles' is sometimes used to refer to all of these, crocodilians is a less ambiguous vernacular term for members of this group. Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
