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Leiodon
Taxonomy
Leiodon was named by Owen (1842) [Non Swainson (1839), non Wood (1839); Sepkoski's age data: K Ceno-u K Maes].
It was corrected as Liodon by Agassiz (1846), Russell (1967) and Carroll (1988); it was synonymized subjectively with Tylosaurus by Hay (1902); it was considered a nomen dubium by Schulp et al. (2008) and Mateus et al. (2012).
It was assigned to Saurii by Meyer (1845) and Agassiz (1846); to Lacertinidae by d'Orbigny (1849); to Natantia by Owen (1851); to Lacertilia by Owen (1842) and Owen (1861); to Pythonomorpha by Hector (1874); to Mosasaurini by Russell (1967); to Mosasauridae by Gervais (1853) and Carroll (1988); to Squamata by Sepkoski (2002); and to Mosasaurinae by Martin and Crame (2006).
It was corrected as Liodon by Agassiz (1846), Russell (1967) and Carroll (1988); it was synonymized subjectively with Tylosaurus by Hay (1902); it was considered a nomen dubium by Schulp et al. (2008) and Mateus et al. (2012).
It was assigned to Saurii by Meyer (1845) and Agassiz (1846); to Lacertinidae by d'Orbigny (1849); to Natantia by Owen (1851); to Lacertilia by Owen (1842) and Owen (1861); to Pythonomorpha by Hector (1874); to Mosasaurini by Russell (1967); to Mosasauridae by Gervais (1853) and Carroll (1988); to Squamata by Sepkoski (2002); and to Mosasaurinae by Martin and Crame (2006).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1842 | Leiodon Owen p. 144 |
| 1845 | Leiodon Meyer p. 283 |
| 1846 | Liodon Agassiz |
| 1849 | Leiodon d'Orbigny p. 209 |
| 1851 | Leiodon Owen p. 41 |
| 1853 | Leiodon Gervais p. 471 |
| 1861 | Leiodon Owen p. 312 |
| 1874 | Leiodon Hector p. 337 |
| 1967 | Liodon Russell p. 142 |
| 1988 | Liodon Carroll |
| 2002 | Leiodon Sepkoski |
| 2006 | Leiodon Martin and Crame p. 113 |
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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. †Leiodon Owen 1842
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†Leiodon anceps Owen 1841
†Leiodon lundgreni Schröder 1885
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Hector 1874 | "This genus was distinguished from Mosasaurus by Owen, by the form of the teeth, which are smooth, curved, and slightly compressed, so that in section they show an ellipse sharply pointed at both ends, and also by the mode of attachment of the teeth to the jaw bone. According to Professor Cope, it is abundant in America, being a characteristic fossil of the cretaceous formation, four species having been obtained from the western, four from the eastern, and two from the southern, cretaceous rocks of the United States; while the only other known species is represented by the jaw fragments found in Europe, and described by Professor Owen. The characters of the vertebrae show it to have been an exceedingly elongated reptile, one of the American species, the individual bones of which are not larger than those now to be described from the Amuri, having belonged to an animal which was not much short of 100 feet in length." |