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Tyrannoneustes lythrodectikos
Taxonomy
Tyrannoneustes lythrodectikos was named by Young et al. (2013). Its type specimen is GLAHM V972, a partial skeleton (right ramus ofmandible (angular, dentary, splenial, surangular, eight teeth), fragment of jugal bar (R), quadratojugal (R, fragment), vertebrae: cervical (4), d), and it is a 3D body fossil. Its type locality is Fletton brick pit, Peterborough, which is in a Callovian marine horizon in the Oxford Clay Formation of the United Kingdom.
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Tyrannoneustes lythrodectikos Young et al. figs. 3-9, 12-18 |
| 2015 | Tyrannoneustes lythrodectikos Parrilla-Bel and Canudo |
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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.
†Tyrannoneustes lythrodectikos Young et al. 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. T. Young et al. 2013 | Metriorhynchid thalattosuchian with moderately enlarged teeth showing strong mediolateral compression, and have a continuous keel at mesial and distal edges.Very poorly defined microscopic true denticles present on both keels, although the denticles do not proceed along the entire carina. In labial or lingual view the height of the denticles does not influence the height of the keel (i.e. no evident/conspicuous serrated edge). Enamel on the labial and lingual surfaces lack conspicuous ornamentation except at the base of the crown where there are accessory ridges orientated to the apicobasal axis of the crown∗; these ridges are low, well spaced and very short∗. Humerus shaft contributes more than 50% of total humeral length, proximal articular margin not in close contact with the deltopectoral crest, caudal margin of the humerus in lateral view distinctly concave. The deltopectoral crest is well developed with: the width of the humerus distal articular head is subequal to the width that the deltopectoral crest projects out from the humerus shaft. In medial view, the ilium articulation facet for the ischium is orientated horizontally∗, and a well-defined crest on the medial margin of the ilium between the articulation facet on the anterior process and the acetabulum∗, the dorsal border of the ilium is short, in medial view it terminates prior to the ischium articulation facet∗. Reception pits for the maxillary teeth present posterior to the seventh dentary alveolus and continue posteriorly even after the dentary tooth row; these reception pits are in the same plane as the dentary alveoli creating an in-line interlocking dentition for the posterior-half of the tooth rows∗ (asterisks denote autapomorphies among metriorhynchids) |
Measurements
No measurements are available
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| Source: subo = suborder | |||||
| Reference: Kiessling 2004 | |||||
Age range: Late/Upper Callovian or 165.30000 to 161.50000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Callovian | France | Tyrannoneustes lythrodectikos (97871) | |
| Middle Callovian | Germany (Northrhine Westphalia) | Metriorhynchus sp. (206063) | |
| Middle Callovian | United Kingdom (England) | Tyrannoneustes lythrodectikos (type locality: 47362 109800 162945) |