|
Anchaurosaurus
''Anchaurosaurus'' (meaning "morning lizard" in Latin) is an extinct genus of iguanian lizard from the Late Cretaceous of Inner Mongolia, China. It belongs to an extinct clade of iguanians called Gobiguania that was endemic to the Gobi Desert during the Late Cretaceous. The type species, ''Anchaurosaurus gilmorei'', was named in 1995 on the basis of a well-preserved skull and incomplete skeleton from the Djadochta Formation. Compared to other iguanians, ''Anchaurosaurus'' has a relatively elongated skull, large eye sockets, and higher tooth crown In dentistry, crown refers to the anatomical area of teeth, usually covered by tooth enamel, enamel. The crown is usually visible in the mouth after tooth development, developing below the gingiva and then tooth eruption, erupting into place. ...s. Phylogenetic analysis indicates that among gobiguanians, ''Anchaurosaurus'' is most closely related to '' Zapsosaurus'' from Mongolia. Below is a cladogram from Daza ''et al.'' (2012) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gobiguania
Gobiguania is an extinct clade of iguanian lizards from the Late Cretaceous. All known gobiguanians are endemic to the Gobi Desert of Mongolia. Gobiguania was given a phylogenetic definition by Jack Conrad and Mark Norell in 2007 as all taxa more closely related to '' Anchaurosaurus gilmorei'' than to '' Iguana iguana'' (the green iguana), '' Crotaphytus collaris'' (the common collared lizard), or '' Agama agama'' (the common agama). According to Conrad and Norell's phylogenetic analysis, Gobiguania includes ''Anchaurosaurus'' as well as several other Late Cretaceous lizards such as '' Ctenomastax'', ''Temujinia'', ''Saichangurvel'', and '' Zapsosaurus''. A phylogenetic analysis published in 2012 indicated that three other lizard genera — '' Igua'', '' Isodontosaurus'', and ''Polrussia ''Polrussia'' is an extinct genus of iguanian lizards dating to the Late Cretaceous epoch, found in what is now Mongolia. It belongs to a group of extinct iguanians called Gobiguania that was e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saichangurvel Davidsoni
''Saichangurvel'' (meaning "beautiful lizard" in Mongolian) is an extinct genus of iguanian lizards from the Late Cretaceous of Mongolia. It is a member of a clade called Gobiguania, an exclusively Late Cretaceous group of iguanian lizards that was likely endemic to the Gobi Desert. The type species, ''Saichangurvel davidsoni'', was named by paleontologists Jack Conrad and Mark Norell of the American Museum of Natural History in 2007. It is known from a single nearly complete and fully articulated skeleton called IGM 3/858, which was found eroding from a block of sandstone during a thunderstorm at a fossil locality called Ukhaa Tolgod. IGM 3/858 comes from the Djadochta Formation, which is between 75 and 71 million years in age. Just as it is today, the Gobi was a desert during the Cretaceous. IGM 3/858 may have died in a collapsing sand dune, the rapid burial preserving its skeleton in pristine condition. ''Saichangurvel'' has a lightly built skull with a short snout and larg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iguania
Iguania is an infraorder of squamate reptiles that includes iguanas, chameleons, agamids, and New World lizards like anoles and phrynosomatids. Using morphological features as a guide to evolutionary relationships, the Iguania are believed to form the sister group to the remainder of the Squamata, which comprise nearly 11,000 named species, roughly 2000 of which are iguanians. However, molecular information has placed Iguania well within the Squamata as sister taxa to the Anguimorpha and closely related to snakes. The order has been under debate and revisions after being classified by Charles Lewis Camp in 1923 due to difficulties finding adequate synapomorphic morphological characteristics. Most Iguanias are arboreal but there are several terrestrial groups. They usually have primitive fleshy, non-prehensile tongues, although the tongue is highly modified in chameleons. The group has a fossil record that extends back to the Early Jurassic (the oldest known member is '' B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iguania
Iguania is an infraorder of squamate reptiles that includes iguanas, chameleons, agamids, and New World lizards like anoles and phrynosomatids. Using morphological features as a guide to evolutionary relationships, the Iguania are believed to form the sister group to the remainder of the Squamata, which comprise nearly 11,000 named species, roughly 2000 of which are iguanians. However, molecular information has placed Iguania well within the Squamata as sister taxa to the Anguimorpha and closely related to snakes. The order has been under debate and revisions after being classified by Charles Lewis Camp in 1923 due to difficulties finding adequate synapomorphic morphological characteristics. Most Iguanias are arboreal but there are several terrestrial groups. They usually have primitive fleshy, non-prehensile tongues, although the tongue is highly modified in chameleons. The group has a fossil record that extends back to the Early Jurassic (the oldest known member is '' B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igua Minuta
''Igua'' is an extinct genus of iguanian lizards belonging to a group called Gobiguania that was endemic to the Gobi Desert during the Late Cretaceous. The type species ''Igua minuta'' was named in 1991 on the basis of a skull from the Barun Goyot Formation in Mongolia. The skull itself is very small, only long, and may have belonged to a juvenile given that it possesses a large fontanelle and that many of the bones are unfused. The snout-vent length of the individual (the total body length minus the tail) is estimated to have been . ''Igua'' differs from related gobiguanians like ''Polrussia'' in having a more rounded skull. It is similar in appearance to the living genera '' Liolaemus'' and ''Tropidurus ''Tropidurus'' is a genus of reptiles. The genus includes many species of Neotropical ground lizards (family Tropiduridae). ''Tropidurus'' is the type genus of the family Tropiduridae. Geographic range and habitat Species in the genus ''Tropid ...''. The teeth are tricu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polrussia Mongoliensis
''Polrussia'' is an extinct genus of iguanian lizards dating to the Late Cretaceous epoch, found in what is now Mongolia. It belongs to a group of extinct iguanians called Gobiguania that was endemic to the Gobi Desert during the Late Cretaceous. The type species In 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 species that contains the biological type specimen ... ''Polrussia mongoliensis'' was named in 1991 on the basis of a skull found in the Barun Goyot Formation. The genus name refers to the Polish and Russian paleontologists who worked together to find and describe the material. ''Polrussia'' has a short skull, slightly pointed and flattened snout, and large eye sockets. The teeth each have one cusp, as opposed to the multiple cusps seen in some other gobiguanians. The skull is only long, making ''Polrussia'' one of the small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurodonta
Pleurodonta (from Greek '' lateral teeth'', in reference to the position of the teeth on the jaw) is one of the two subdivisions of Iguania, the other being Acrodonta ('' teeth on the top f the jaw'). Pleurodonta includes all families previously split from Iguanidae ''sensu lato'' (Corytophanidae, Crotaphytidae, Hoplocercidae, Opluridae, Polychrotidae, etc.), whereas Acrodonta includes Agamidae and Chamaeleonidae. The name Pleurodonta was first used by paleontologist and herpetologist Edward Drinker Cope in 1864, although he used it in a different sense than it is used today. Because of this difference, the name Iguanoidea has been proposed as a replacement for Pleurodonta in phylogenetic nomenclature. ''Pleurodonta'' is also a synonym of gastropod genus ''Pleurodonte ''Pleurodonte'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Pleurodontinae of the family Pleurodontidae. MolluscaBase eds. (2021). MolluscaBase. Pleurodont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Priscagamidae
Priscagamidae is an extinct family of iguanian lizards known from the Late Cretaceous of Mongolia and China and the Eocene of India, spanning a range from 75 to 54 million years ago. It includes the genera ''Heterodontagama'', ''Mimeosaurus'', ''Phrynosomimus'', ''Priscagama'', and possibly ''Pleurodontagama''. The first fossils of priscagamids were found in the Djadochta and Khermeen Tsav formations of Mongolia. More recently they have been found in the Cambay Formation in India, leading to the naming of ''Heterodontagama'' in 2013. Priscagamidae was originally described as a subfamily of Agamidae called Priscagaminae in 1984, but it was reclassified as a distinct family in 1989. Most phylogenetic analyses (analyses of evolutionary relationships) still find a close relationship between Priscagamidae and Agamidae (both have been grouped under a clade called Chamaeleontiformes), although a 2015 study found it to be basal to all other iguanian clades, warranting its removal from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrodonta (lizard)
Acrodonta are a subclade of Iguania, iguanian Squamata, squamates consisting almost entirely of Old World taxa. Extant representation include the families Chamaeleonidae (chameleons) and Agamidae (dragon lizards), with at least over 500 species described. A fossil genus, ''Gueragama'', was found in Brazil, making it the only known New World, American representative of the group. The group is eponymously named from their acrodont dentition, whereby the teeth are consolidated with the summit of the alveolar ridge of the jaw without sockets. There are, however, other animals that have acrodont dentition such as tuataras. Systematics Usually acrodonts are divided into two families Chamaeleonidae and Agamidae, there are a few studies that suggest chameleons are nested within Agamidae. In order to maintain the familial status of Chamaeleonidae some authors suggested placing the clades Uromastycinae and Leiolepidinae in a third family Leiolepididae. However a majority of papers concern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iguanoidea
Pleurodonta (from Greek '' lateral teeth'', in reference to the position of the teeth on the jaw) is one of the two subdivisions of Iguania, the other being Acrodonta ('' teeth on the top f the jaw'). Pleurodonta includes all families previously split from Iguanidae ''sensu lato'' (Corytophanidae, Crotaphytidae, Hoplocercidae, Opluridae, Polychrotidae, etc.), whereas Acrodonta includes Agamidae and Chamaeleonidae. The name Pleurodonta was first used by paleontologist and herpetologist Edward Drinker Cope in 1864, although he used it in a different sense than it is used today. Because of this difference, the name Iguanoidea has been proposed as a replacement for Pleurodonta in phylogenetic nomenclature. ''Pleurodonta'' is also a synonym of gastropod genus ''Pleurodonte ''Pleurodonte'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Pleurodontinae of the family Pleurodontidae. MolluscaBase eds. (2021). MolluscaBase. Pleurodonte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychrotidae
The Polychrotidae family (sometimes classified as the Polychrotinae subfamily instead) of iguanian lizards contains the living genus ''Polychrus'' (commonly called bush anoles) and the extinct genus ''Afairiguana''. The family Polychrotidae was once thought to encompass all anoles, including those in the genus ''Anolis'' (which are now included in the family Dactyloidae). Studies of the evolutionary relationships of anoles based on molecular information has shown that ''Polychrus'' is not closely related to ''Anolis'', but instead closer to Hoplocercidae Hoplocercidae are a family of lizards native to the tropical forests, woodlands and savanna-like habitats of Central and South America. Alternatively they are recognized as a subfamily, Hoplocercinae. 20 species in three genera are described. Sp .... It is therefore not part of Dactyloidae and instead is treated as the family, Polychrotidae. References Extant Ypresian first appearances Lizard families Extant Eocene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |