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Keichousauridae
Taxonomy
Keichousauridae was named by Young (1965). Its type is Keichousaurus.
It was assigned to Pachypleurosauroidea by Young (1965); to Nothosauria by Kuhn (1966); and to Pachypleurosauria by Liu et al. (2011).
It was assigned to Pachypleurosauroidea by Young (1965); to Nothosauria by Kuhn (1966); and to Pachypleurosauria by Liu et al. (2011).
Subtaxa
Dianopachysaurus, Keichousaurus (type genus)
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Keichousauridae Young p. 337 |
| 1966 | Keichousauridae Kuhn p. 112 |
| 2011 | Keichousauridae Liu et al. p. 293 |
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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.
Fm. †Keichousauridae Young 1965
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G. †Keichousaurus Young 1958
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†Keichousaurus hui Young 1958
†Keichousaurus yuananensis Young 1965
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Liu et al. 2011 | "Frontals in adult fused; posterior margin of quadrate straight; one or two enlarged teeth on maxilla present; ectepicondylar groove open without anterior notch; total number of carpal ossifications more than three." |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum | |||||
| References: Bush and Bambach 2015, Carroll 1988, Hendy et al. 2009 | |||||
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Olenekian | China (Hubei) | Keichousaurus yuananensis (100271) | |
| Pelsonian | China (Yunnan) | Dianopachysaurus dingi (97946) | |
| Ladinian | China (Yunnan) | Keichousaurus sp. (106668) | |
| Longobardian | China (Guizhou) | Keichousaurus hui (98691) Keichousaurus sp. (153371 175087 196506) | |
| Longobardian | China (Yunnan) | Keichousaurus hui (196166) |