Archosauromorphs [1] ( lat. Archosauromorpha ) - an infraclass of reptiles from a subclass of diapsids . First appeared in the Late Permian and spread in the Triassic . This infraclass includes directly archosaurs (including Crocodylia , dinosaurs , birds ) and some extinct orders [2] . In 1991, a work was published in which archosaurus were considered as a treasure , including the earliest common ancestor of the groups Prolacerta , archosaurs, Trilophosaurus , Hyperodapedon and all their descendants [3] . In 1998, David Dilkes published a paper where he formulated a more general definition for a clade, including Protorosaurus and its close diapsides [4] .
| Archosauromorphs |
Trilophosaurus , a primitive archosaurus |
| Scientific classification |
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| No rank : | Bilateral symmetrical |
| Infraclass : | Archosauromorphs |
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| International scientific name |
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Archosauromorpha von Huene , 1946 |
| Subsidiary taxa |
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see text |
Geochronologyappeared 255 million years | million years | Period | Era | Aeon |
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| 2,588 | Even | | | Ka | F
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th | | 23.03 | Neogene | | 66.0 | Paleogen | | 145.5 | a piece of chalk | M
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th | | 199.6 | Yura | | 251 | Triassic | | 299 | Permian | P
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th | | 359.2 | Carbon | | 416 | Devonian | | 443.7 | Silur | | 488.3 | Ordovician | | 542 | Cambrian | | 4570 | Precambrian |
◄ Nowadays◄ Cretaceous-Paleogene extinction◄ Triassic extinction◄ Mass Permian Extinction◄ Devonian extinction◄ Ordovician-Silurian extinction◄ Cambrian explosion |
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Now the following taxa are included in the infraclass: rhinosaurus , Trilophosauridae , protorosaurs and Archosauriformes . Despite the fact that the representatives of these groups are very different in appearance, they carry a number of common features of the skeleton, which indicates their common origin. Some authors also include groups such as Choristodera , Drepanosauromorpha [4] , Thalattosauria , Ichthyopterygia , sauroperteria [5] [6] [7] and turtles [8] .
Content
Classification
According to the Paleobiology Database website, as of September 2018, the following taxa are included in the infraclass [9] :
- Childbirth incertae sedis
- † Genus Aenigmastropheus Ezcurra et al. , 2014 (1 view)
- † Genus Arctosaurus Adams, 1875 (1 species)
- † Genus Czatkowiella Borsuk − Białynicka & Evans, 2009 (1 species)
- † Genus Jesairosaurus Jalil, 1997 (1 species)
- † Genus Mecistotrachelos Fraser et al. , 2007 (1 view)
- † Genus Protorosaurus Meyer, 1830 (1 species, previously in the Protorosauridae family)
- † Genus Teyujagua Pinheiro et al. , 2016 (1 view)
- † Tanystropheidae Gervais family , 1859 (formerly in the protorosaurus order)
- † Family Trilophosauridae Gregory, 1945 (formerly in the order Trilophosauria)
- † Clade (family) Teraterpetidae Sues, 2003
- † Superfamily Helveticosauroidea Rieppel, 1989
- † Helveticosauridae Peyer Family, 1955
- † Treasure troop Prolacertiformes Camp, 1945
- † Order Protorosauria Huxley, 1871 - Protosaurus
- † Family Protorosauridae Cope, 1871
- † Sharovipterygidae Tatarinov Family , 1989
- † Order Trilophosauria
- Clade Crocopoda Ezcurra, 2016
- Childbirth incertae sedis
- † Genus Boreopricea Tatarinov, 1978 (1 species)
- † Genus Eorasaurus Sennikov, 1997 (1 species)
- † Genus Prolacertoides Young, 1973 (1 species)
- † Genus Tasmaniosaurus Camp & Banks, 1978 (1 species)
- † Prolacertidae Parrington family , 1935 (formerly in the order Prolacertiformes or protorosaurs)
- † Clade Allokotosauria Nesbitt et al. 2015
- † Genus Coelodontognathus Ochev, 1967 (2 species)
- † Genus Pamelaria Sen, 2003 (1 species)
- † Genus Trilophosaurus Case, 1928 (2 species, formerly in the Trilophosauridae family)
- † Azendohsauridae Nesbitt et al. Family 2015
- † Treasure (Order) Rhynchosauria Osborn, 1903 - Rinhosaurs
- Clade Archosauriformes Gauthier, 1986
Phylogeny
The cladogram is based on an analysis of Archosauriformes performed by MD Ezcurra in 2016 [10] :
| Sauria |
| † Choristodera |
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| Lepidosauromorphs |
| | Archosauromorphs |
| † Aenigmastropheus |
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| † Protorosaurus |
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| † Tanystropheidae |
| | Crocopoda | | † Allokotosauria |
| † Pamelaria |
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| † Azendohsaurus |
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| † Trilophosaurus |
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| † Rinhosaurs |
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| † Boreopricea |
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| † Prolacertidae |
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| † Tasmaniosaurus |
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| Archosauriformes |
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Individual Representatives
- † Avicranium renestoi Pritchard & Nesbitt, 2017
- † Czatkowiella harae Borsuk − Białynicka & Evans, 2009 - a species that lived in the Middle Triassic (about 247 million years ago) in the territory of modern Poland .
