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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
''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] |
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 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] |
Anchaurosaurus Gilmorei
''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 crowns. Phylogenetic analysis indicates that among gobiguanians, ''Anchaurosaurus'' is most closely related to '' Zapsosaurus'' from Mongolia. 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 ... from Daza ''et al.'' (2012) sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Igua
''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''. The teeth are tricuspid and pleurodont, meaning they are attached to inner surfaces of the jaws. 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 ... [...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 '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamaeleontiformes
Chamaeleontiformes is a hypothesized clade (evolutionary grouping) of iguanian lizards defined as all taxa sharing a more recent common ancestor with ''Chamaeleo chamaeleon'' (the common chamaeleon) than with '' Hoplocercus spinosus'' (the Brazilian spiny-tailed lizard), ''Polychrus marmoratus'' (bush lizard), or '' Iguana iguana'' (green iguana). It was named by paleontologist Jack Conrad in 2008 to describe a clade recovered in his phylogenetic analysis that included the extinct genus ''Isodontosaurus'', the extinct family Priscagamidae, and the living clade Acrodonta, which includes agamids and chameleons. It is a stem-based taxon and one of two major clades within Iguania, the other being Pleurodonta. 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 ... fro ... [...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 '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isodontosaurus
''Isodontosaurus'' is an extinct genus of iguanian lizard from the Late Cretaceous of Mongolia and China. The type species is ''Isodontosaurus gracilis''. ''Isodontosaurus'' is part of an extinct group of Late Cretaceous iguanians called 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 mor ..., which is currently thought to be endemic to Mongolia. References External links Isodontosaurus on paleofile.com Cretaceous lizards Prehistoric lizard genera Late Cretaceous lepidosaurs of Asia Fossil taxa described in 1943 Taxa named by Charles W. Gilmore {{paleo-lizard-stub ... [...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. Pleuro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |