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Metriorhynchus brachyrhynchus
Taxonomy
Teleosaurus brachyrhynchus was named by Eudes-Deslongchamps (1868). Its type specimen is NHMUK PV R3700 (neotype), a skull (almost complete skull), and it is a 3D body fossil.
It was recombined as Suchodus brachyrhynchus by Young et al. (2010), Bronzati et al. (2012) and Young et al. (2013); it was recombined as Metriorhynchus brachyrhynchus by Deslongchamps (1867), Eudes-Deslongchamps (1869), Andrews (1913), Adams-Tresman (1987), Young et al. (2013) and Parrilla-Bel and Canudo (2015).
It was recombined as Suchodus brachyrhynchus by Young et al. (2010), Bronzati et al. (2012) and Young et al. (2013); it was recombined as Metriorhynchus brachyrhynchus by Deslongchamps (1867), Eudes-Deslongchamps (1869), Andrews (1913), Adams-Tresman (1987), Young et al. (2013) and Parrilla-Bel and Canudo (2015).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1867 | Metriorhynchus brachyrhynchus Deslongchamps p. 333 figs. Pl. XXIII, figs. 1a-d |
| 1868 | Teleosaurus brachyrhynchus Eudes-Deslongchamps |
| 1869 | Metriorhynchus brachyrhynchus Eudes-Deslongchamps |
| 1913 | Metriorhynchus cultridens Andrews p. 196 figs. Pl. XI, figs. 2-4; text-figs. 60, 61B, C, 66, 73E |
| 1913 | Metriorhynchus brachyrhynchus Andrews p. 198 figs. Pl. XII, text-figs. 58, 59, 73F |
| 1987 | Metriorhynchus brachyrhynchus Adams-Tresman |
| 2010 | Suchodus brachyrhynchus Young et al. p. 854 |
| 2012 | Suchodus brachyrhynchus Bronzati et al. |
| 2013 | Suchodus brachyrhynchus Young et al. figs. 22F-G, 25 |
| 2013 | Metriorhynchus brachyrhynchus Young et al. |
| 2015 | Metriorhynchus brachyrhynchus 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.
†Metriorhynchus brachyrhynchus Eudes-Deslongchamps 1868
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Invalid names: Metriorhynchus cultridens Andrews 1913 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. T. Young et al. 2013 | Metriorhynchid thalattosuchian with laminar teeth with moderate to strong mediolateral compression; crowns have a continuous keel at mesial and distal edges; enamel on labial surface lacks conspicuous ornamentation, while the lingual surface possesses poorly developed apicobasally aligned accessory ridges. Poorly defined microscopic true denticles present on both keels; denticles do not procede along the entire carina; in labial or lingual view the height of the denticles weakly influence the height of the keel (i.e. poorly serrated edge). Maxillae hold between 12 and 18 teeth; dentaries hold between 12 and 17 teeth, while seven or eight of those are adjacent to the mandibular symphysis. The skull is broad with a mesorostrine snout (sensu Young et al. 2010), with a maximum known basicranial length of 853 mm. Nasals and premaxillae either contact or separated by up to 38 mm. Both the frontal and prefrontal bones have conspicuous ornamentation. Approximately 90◦ angle formed by the lateral and medial processes of the frontal; the rostromedial border of the supratemporal fossa (intratemporal flange) is acutely angled. 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. |
Measurements
No measurements are available
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| Source: subo = suborder | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Late/Upper Bathonian to the top of the Early/Lower Callovian or 167.70000 to 161.20000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Bathonian | Argentina (Neuquen) | Metriorhynchus brachyrhynchus (136383) | |
| Early/Lower Callovian | France (Normandy) | Metriorhynchus brachyrhynchus (224109) | |
| Late/Upper Callovian | France (Basse-Normandie) | Metriorhynchus brachyrhynchus (52633) | |
| Middle Callovian | United Kingdom (England) | Metriorhynchus brachyrhynchus (133068) Metriorhynchus cultridens, Metriorhynchus brachyrhynchus (109800) | |
| Late/Upper Jurassic | France (Vienne) | Metriorhynchus brachyrhynchus (154224) |