Sphenacodontoidea: Difference between revisions
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{{Automatic taxobox |
{{Automatic taxobox |
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| name = Sphenacodontoids |
| name = Sphenacodontoids |
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| fossil_range = [[Late Carboniferous]]-Recent, {{Fossil range| |
| fossil_range = [[Late Carboniferous]]-Recent, {{Fossil range|299|0}} |
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| image = Ctenospondylus2DB2.jpg |
| image = Ctenospondylus2DB2.jpg |
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| image_caption = ''[[Ctenospondylus]]'' |
| image_caption = ''[[Ctenospondylus]]'' |
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Revision as of 19:16, 11 November 2015
| Sphenacodontoids Temporal range: Late Carboniferous-Recent,
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| Ctenospondylus | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Pantherapsida |
| Clade: | Sphenacodontoidea |
| Clades | |
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See text. | |
Sphenacodontoidea is a node-based clade that defined to include the most recent common ancestor of the Sphenacodontidae and the Therapsida and their descendants (including mammals). They are defined according to a number of specialised characteristics concerning proportions of the bones of the skull and the teeth.
The Sphenacodontoidea evolved from earlier Sphenacodontia such as Haptodus via a number of transitional stages of small, unspecialised pelycosaurs.
Classification
The following taxonomy follows Fröbisch et al. (2011) and Benson (in press) unless otherwise noted.[1][2]
Class Synapsida
- Sphenacodontoidea
- Family †Sphenacodontidae
- Therapsida
References
- ^ "A new basal sphenacodontid synapsid from the Late Carboniferous of the Saar-Nahe Basin, Germany" (PDF). Acta Palaeontologica Polonica. 56 (1): 113–120. 2011. doi:10.4202/app.2010.0039.
{{cite journal}}: Unknown parameter|authors=ignored (help) - ^ Benson, R.J. (2012). "Interrelationships of basal synapsids: cranial and postcranial morphological partitions suggest different topologies". Journal of Systematic Paleontology. in press. doi:10.1080/14772019.2011.631042.
- Laurin, M. and Reisz, R. R., 1997, Autapomorphies of the main clades of synapsids - Tree of Life Web Project
See also
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