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Lemmysuchus obtusidens
Taxonomy
Steneosaurus obtusidens was named by Andrews (1909). Its type specimen is BMNH R. 3168, a partial skeleton, and it is a 3D body fossil. Its type locality is Peterborough area, Leeds Collection, which is in a Callovian offshore mudstone in the Oxford Clay Formation of the United Kingdom. It is the type species of Lemmysuchus.
It was synonymized subjectively with Steneosaurus durobrivensis by Adams-Tresman (1987); it was synonymized subjectively with Machimosaurus hugii by Pierce et al. (2009); it was recombined as Lemmysuchus obtusidens by Johnson et al. (2018).
It was synonymized subjectively with Steneosaurus durobrivensis by Adams-Tresman (1987); it was synonymized subjectively with Machimosaurus hugii by Pierce et al. (2009); it was recombined as Lemmysuchus obtusidens by Johnson et al. (2018).
Synonymy list
| Year | Name and author |
|---|---|
| 1909 | Steneosaurus obtusidens Andrews p. 306 figs. Pl. ix, fig. 2 |
| 1913 | Steneosaurus obtusidens Andrews p. 130 figs. Text-fig. 50; Plate 7 |
| 2013 | Steneosaurus obtusidens Martin and Vincent |
| 2018 | Lemmysuchus obtusidens Johnson et al. figs. 1-21 |
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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.
†Lemmysuchus obtusidens Andrews 1909
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. M. Johnson et al. 2018 | Teleosaurid crocodylomorph with the following unique combination of characters [proposed autapomorphic characters are indicated by an asterisk (*)]: the rostrum external surface is strongly convex, in particular the nasals*; partial or complete fusion of the internasal suture*; axis lacks diapophyses (shared with Steneosaurus bollensis Jaeger, 1828; see Westphal, 1962); the ilium anterior process is small and anteroposteriorly shortened*; on the ilium the acetabulum is shallow and poorly developed*; shallow supraacetabular crest on the ilium*; the dorsal osteoderm ornamentation is composed of small-to-large, irregularly shaped pits that radiate from the centre of the keel and are arranged in a starburst pattern (to a certain extent similar to M. mosae; Hua, 1999; Young et al., 2014a)*. |
Measurements
No measurements are available
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| Source: subo = suborder | |||||
| Reference: Kiessling 2004 | |||||
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Callovian | France (Calvados) | Steneosaurus obtusidens (154956) | |
| Middle Callovian | United Kingdom (England) | Steneosaurus obtusidens (type locality: 109800) | |
| Oxfordian | United Kingdom (Dorset) | Steneosaurus obtusidens (224072) | |
| Neocomian | Spain (Valenciana) | Steneosaurus obtusidens (159585) |