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Coniasaurus
Taxonomy
Coniasaurus was named by Owen (1850) [Sepkoski's age data: K Ceno-u K Turo-u]. Its type is Coniasaurus crassidens.
It was assigned to Repentia by Owen (1850) and Owen (1851); to Lacertilia by Owen (1861); to Mosasauridae by McDowell and Bogert (1954); to Aigialosauridae by Carroll (1988); to Mosasauroidea by Caldwell and Cooper (1999); to Squamata by Caldwell (1999) and Sepkoski (2002); and to Dolichosauridae by Bell et al. (1982) and Shimada and Ystesund (2007).
It was assigned to Repentia by Owen (1850) and Owen (1851); to Lacertilia by Owen (1861); to Mosasauridae by McDowell and Bogert (1954); to Aigialosauridae by Carroll (1988); to Mosasauroidea by Caldwell and Cooper (1999); to Squamata by Caldwell (1999) and Sepkoski (2002); and to Dolichosauridae by Bell et al. (1982) and Shimada and Ystesund (2007).
Species
C. crassidens (type species), C. gracilodens
Synonymy list
| Year | Name and author |
|---|---|
| 1850 | Coniasaurus Owen p. 380–381 |
| 1851 | Coniasaurus Owen p. 21 figs. plate 9, figs 13-15 |
| 1861 | Coniosaurus Owen p. 311 |
| 1954 | Coniasaurus McDowell and Bogert p. 132 |
| 1982 | Coniasaurus Bell et al. p. 520 fig. 1 |
| 1988 | Coniasaurus Carroll |
| 1999 | Coniasaurus Caldwell |
| 1999 | Coniasaurus Caldwell and Cooper p. 430 |
| 2002 | Coniasaurus Sepkoski |
| 2007 | Coniasaurus Shimada and Ystesund |
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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. †Coniasaurus Owen 1850
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†Coniasaurus crassidens Owen 1850
†Coniasaurus gracilodens Caldwell 1999
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. A. Bell et al. 1982 | "Dentition subpleurodont, marginal teeth progressively increasing in thickness posteriorly with greater relative constriction at base and recurvature of crown; teeth expanded labio-lingually and compressed antero-posteriorly; longitudinal coronal groove present on posterior surface of tooth; pterygoid toothed, articulating with ectopterygoid laterally, palatine anteriorly, and possessing a long quadrate ramus; pterygoid teeth conical, homodont; vertebrae procoelous, with condyle directed posteriorly and slightly dorsal; ventral surface of centrum generally flattened; zygosphene-zygantrum articulation present; cervical vertebrae with well-developed, posteriorly-positioned, fused hypapophyses; haemapophyses present on caudal vertebrae." |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Age range: base of the Early/Lower Cenomanian to the top of the Middle Santonian or 99.60000 to 83.50000 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cenomanian | USA (Texas) | C. crassidens (102475) | |
| Cenomanian | United Kingdom (England) | C. crassidens (118448 118449) | |
| Early/Lower Cenomanian | United Kingdom (England) | C. gracilodens (118335) | |
| Early/Lower Cenomanian - Middle Cenomanian | United Kingdom (England) | C. crassidens (118407) | |
| Late/Upper Cenomanian | USA (Texas) | C. sp. (102474) | |
| Late/Upper Cenomanian | United Kingdom (England) | C. crassidens (118408) | |
| Late/Upper Cenomanian | USA (Colorado) | C. crassidens (132505) | |
| Middle Cenomanian | Canada (Saskatchewan) | C. crassidens (22731) | |
| Middle Cenomanian | USA (Colorado) | C. crassidens (35429 213403) | |
| Middle Cenomanian | USA (Kansas) | C. crassidens (94538) | |
| Middle Cenomanian - Late/Upper Cenomanian | United Kingdom (England) | C. crassidens (118409) | |
| Early/Lower Turonian | USA (Kansas) | C. crassidens (213385) | |
| Middle Turonian | USA (Nebraska) | C. sp. (213389) | |
| Middle Turonian | USA (Kansas) | C. crassidens (115647 213390) | |
| Middle Santonian | USA (Kansas) | C. sp. (103989) |