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Chaohusaurus
Taxonomy
Chaohusaurus was named by Young and Dong (1972) [Sepkoski's age data: Tr Olen Sepkoski's reference number: 746]. It is considered to be a form taxon. Its type is Chaohusaurus geishanensis.
It was assigned to Omphalosauridae by Carroll (1988); to Grippidia by Motani (1999); to Ichthyosauria by Sepkoski (2002); to Grippiidae by Maisch and Matzke (2000), McGowan and Motani (2003) and Maisch (2010); and to Ichthyopterygia by Motani et al. (2015) and Ji et al. (2016).
It was assigned to Omphalosauridae by Carroll (1988); to Grippidia by Motani (1999); to Ichthyosauria by Sepkoski (2002); to Grippiidae by Maisch and Matzke (2000), McGowan and Motani (2003) and Maisch (2010); and to Ichthyopterygia by Motani et al. (2015) and Ji et al. (2016).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Chaohusaurus Young and Dong |
| 1985 | Anhuisaurus Chen |
| 1988 | Chaosaurus Carroll |
| 1991 | Chensaurus Mazin Suteethora et al. |
| 1999 | Chaohusaurus Motani p. 478 |
| 2000 | Chaohusaurus Maisch and Matzke p. 61 |
| 2002 | Chaohusaurus Sepkoski |
| 2002 | Chensaurus Sepkoski |
| 2003 | Chaohusaurus McGowan and Motani |
| 2010 | Chaohusaurus Maisch |
| 2015 | Chaohusaurus Motani et al. p. 3 |
| 2016 | Chaohusaurus Ji et al. p. 3 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Chaohusaurus Young and Dong 1972
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†Chaohusaurus brevifemoralis Huang et al. 2019
†Chaohusaurus chaoxianensis Chen 1985
†Chaohusaurus geishanensis Young and Dong 1972
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Invalid names: Chensaurus faciles Chen 1985 [objective synonym]
†Chaohusaurus zhangjiawanensis Chen et al. 2013
Invalid names: Anhuisaurus Chen 1985 [synonym], Chensaurus Mazin Suteethora et al. 1991 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. W. Maisch and A. T. Matzke 2000 | "Small ichthyosaur with very delicate and slender snout, dentition heterodontous, maxillary teeth blunt, posterior dentary teeth rounded and blunt, several maxillary tooth rows, radius with marked anteroproximal prominance, neural spines of caudal vertebrae rather short." | |
| C. Ji et al. 2016 | Quadratojugal taller than long; snout relatively slen- der; maxilla with multiple tooth rows; posterior tooth crown rounded; interclavicle posterior process absent; clavicle orientation at proximal end transverse; ulnar facet of humerus posterodistally deflected and radius facet distally orientated; anteroproximal promi- nence of radius extensively developed; distal carpal I absent; pubis obturator foramen partially open; small body size of less than 1 m. |