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Metriorhynchus
Taxonomy
Metriorhynchus was named by von Meyer (1830) [Sepkoski's age data: J Call-l J Tith-u Sepkoski's reference number: 2,620]. It is the type genus of Metriorhynchidae, Metriorhynchoidea, Metriorhynchinae.
It was assigned to Geosauridae by Andrews (1913); to Crocodilia by Sepkoski (2002); to Thalattosuchia by Charig (1967), Larsson and Sues (2007) and Bronzati et al. (2012); to Thalattosuchia by Jouve et al. (2006) and Young et al. (2013); to Neosuchia by Zaher et al. (2006), Nascimento and Zaher (2011) and Sertich and O'Connor (2014); to Metriorhynchidae by Delair (1958), Buffetaut and Thierry (1977), Carroll (1988), Gasparini et al. (2000), Gasparini et al. (2006), Gasparini et al. (2008), Araujo et al. (2008), Jouve (2009) and Parrilla-Bel and Canudo (2015); and to Metriorhynchinae by Young et al. (2010), Cau and Fanti (2011), Young (2013) and Young et al. (2024).
It was assigned to Geosauridae by Andrews (1913); to Crocodilia by Sepkoski (2002); to Thalattosuchia by Charig (1967), Larsson and Sues (2007) and Bronzati et al. (2012); to Thalattosuchia by Jouve et al. (2006) and Young et al. (2013); to Neosuchia by Zaher et al. (2006), Nascimento and Zaher (2011) and Sertich and O'Connor (2014); to Metriorhynchidae by Delair (1958), Buffetaut and Thierry (1977), Carroll (1988), Gasparini et al. (2000), Gasparini et al. (2006), Gasparini et al. (2008), Araujo et al. (2008), Jouve (2009) and Parrilla-Bel and Canudo (2015); and to Metriorhynchinae by Young et al. (2010), Cau and Fanti (2011), Young (2013) and Young et al. (2024).
Synonymy list
| Year | Name and author |
|---|---|
| 1830 | Metriorhynchus von Meyer figs. pl. 5, fig. 1-2; pl. 6, fig. 1; pl. 9, f |
| 1913 | Metriorhynchus Andrews p. 143 |
| 1958 | Metriorhynchus Delair p. 60 |
| 1967 | Metriorhynchus Charig p. 710 |
| 1977 | Metriorhynchus Buffetaut and Thierry |
| 1988 | Metriorhynchus Carroll |
| 2000 | Metriorhynchus Gasparini et al. |
| 2002 | Metriorhynchus Sepkoski |
| 2006 | Metriorhynchus Gasparini et al. p. 72 |
| 2006 | Metriorhynchus Jouve et al. |
| 2006 | Metriorhynchus Zaher et al. |
| 2007 | Metriorhynchus Larsson and Sues |
| 2008 | Metriorhynchus Araujo et al. p. 20 |
| 2008 | Metriorhynchus Gasparini et al. |
| 2009 | Metriorhynchus Jouve |
| 2010 | Metriorhynchus Young et al. pp. 846-847 |
| 2011 | Metriorhynchus Cau and Fanti p. 558 fig. 6 |
| 2011 | Metriorhynchus Nascimento and Zaher |
| 2012 | Metriorhynchus Bronzati et al. |
| 2013 | Metriorhynchus Young |
| 2013 | Metriorhynchus Young et al. |
| 2014 | Metriorhynchus Sertich and O'Connor |
| 2015 | Metriorhynchus Parrilla-Bel and Canudo |
| 2024 | Metriorhynchus Young et al. p. 600 |
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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. †Metriorhynchus von Meyer 1830
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†Metriorhynchus blainvillei Eudes-Deslongchamps 1867
†Metriorhynchus brachyrhynchus Eudes-Deslongchamps 1868
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Invalid names: Metriorhynchus cultridens Andrews 1913 [synonym]
†Metriorhynchus casamiquelai Gasparini and Chong 1977
†Metriorhynchus geoffroyii Meyer 1832
†Metriorhynchus hastifer Eudes-Deslongchamps 1868
†Metriorhynchus littoreus Sauvage 1874
†Metriorhynchus moreli Deslongchamps 1867
†Metriorhynchus palpebosus Phillips 1871
†Metriorhynchus westermanni Gasparini 1980
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. T. Young et al. 2010 | Metriorhynchid thalattosuchian with over 20 teeth per maxilla, and more than 20 teeth per dentary; variable ornamentation on the cranial bones, but lacking conspicuous ornamentation on the rostrum; the antorbital fossa is elongate, narrow, and oriented obliquely, and is enclosed by the lacrimal, maxilla, and jugal; the antorbital pseudofenestra is enclosed by the lacrimal, nasal, and maxilla; the internal nares opens out posteriorly into the buccal cavity, with the palatines creating a V-shape with its apex directed anteriorly; the maxilla–palatine suture forms an M-shape orientated posteriorly; the squamosal contributes at least 50% to the supratemporal arch; the length of the cervical centrum is shorter than its height; the tibia is roughly one third of the length of the femur; the atlas hypocentrum is subequal in length to the odontoid process length; the humerus is subequal in length to the scapula. |