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Contritosaurus
Taxonomy
Contritosaurus was named by Ivakhnenko (1974). It is not extant.
It was synonymized subjectively with Phaanthosaurus by Spencer and Benton (2000).
It was assigned to Spondylolestidae by Ivakhnenko (2008); and to Procolophonidae by Ivakhnenko (1974), Carroll (1988), Modesto et al. (2002), Modesto and Damiani (2007) and Säilä (2008).
It was synonymized subjectively with Phaanthosaurus by Spencer and Benton (2000).
It was assigned to Spondylolestidae by Ivakhnenko (2008); and to Procolophonidae by Ivakhnenko (1974), Carroll (1988), Modesto et al. (2002), Modesto and Damiani (2007) and Säilä (2008).
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Contritosaurus Ivakhnenko p. 346 |
| 1988 | Contritosaurus Carroll |
| 2002 | Contritosaurus Modesto et al. p. 891 fig. 4 |
| 2007 | Contritosaurus Modesto and Damiani p. 347 fig. 8 |
| 2008 | Contritosaurus Ivakhnenko |
| 2008 | Contritosaurus Säilä p. 1202 fig. 4 |
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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. †Contritosaurus Ivakhnenko 1974
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. F. Ivakhnenko 1974 | A very small procolophonid ( length of skull reaching 2 cm). Skull high. Preorbital portion high and short. Orbits very large, rounded-trapezoidal, drawn out rearward. Fossa of lateral nasal gland very considerable, nostrils small. Lacrimal not extending to margin of nostril; postfrontal not fused with parietal. Upper margin of orbit formed by the joining of the prefrontal and postfrontal bones. Teeth differentiated: front teeth (5-6 in upper jaw and 3 in lower jaw) conical, with slightly dilated and lingually recurved crowns, rear 7-8 teeth on both jaws with heavily dilated bases and pointed crowns, frequently with oblique surfaces of wearing. The number of teeth increased in the course of growth; signs of tooth replacement have scarcely ever been observed. There are 4 rows of teeth on the palate-pterygoid, palatine and 2 vomerine (perichoanal and medial); the perichoanal row of teeth is double. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Collections
No collection or age range data are available