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Monjurosuchus
Taxonomy
Monjurosuchus was named by Endo (1940). Its type is Monjurosuchus splendens.
It was assigned to Sphenodontidae by Carroll (1988); to Monjurosuchidae by Endo (1940), Benton (1985), Gao and Fox (2005), Gao and Li (2007), Zhou and Wang (2010); to Choristodera by Gao et al. (2000), Matsumoto et al. (2007), Matsumoto and Evans (2010), Matsumoto et al. (2013), Matsumoto et al. (2019); and to Allochoristodera by Dong et al. (2020).
It was assigned to Sphenodontidae by Carroll (1988); to Monjurosuchidae by Endo (1940), Benton (1985), Gao and Fox (2005), Gao and Li (2007), Zhou and Wang (2010); to Choristodera by Gao et al. (2000), Matsumoto et al. (2007), Matsumoto and Evans (2010), Matsumoto et al. (2013), Matsumoto et al. (2019); and to Allochoristodera by Dong et al. (2020).
Species
M. manchoukuoensis, M. splendens (syn. Rhynchosaurus orientalis) (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1940 | Monjurosuchus Endo pp. 2-3 |
| 1985 | Monjurosuchus Benton p. 154 |
| 1988 | Monjurosuchus Carroll |
| 2000 | Monjurosuchus Gao et al. p. 417 |
| 2005 | Monjurosuchus Gao and Fox p. 438 |
| 2007 | Monjurosuchus Gao and Li p. 263 |
| 2007 | Monjurosuchus Matsumoto et al. p. 331 |
| 2010 | Monjurosuchus Matsumoto and Evans |
| 2010 | Monjurosuchus Zhou and Wang |
| 2013 | Monjurosuchus Matsumoto et al. |
| 2019 | Monjurosuchus Matsumoto et al. |
| 2020 | Monjurosuchus Dong et al. p. 1239 figs. Figure 14 |
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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. †Monjurosuchus Endo 1940
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†Monjurosuchus manchoukuoensis Zhou and Wang 2010
†Monjurosuchus splendens Endo 1940
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Invalid names: Rhynchosaurus orientalis Endo and Shikama 1942 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Matsumoto et al. 2007 | Choristoderan genus characterised by the combination of paired nasals that intervene posteriorly between anterior tips of prefrontals; frontals fused, posterolaterally expanded but markedly narrow and constricted between orbits; prefrontal equal to frontal in length; lachrymal facet on prefrontal longer than maxillary facet; supratemporal fenestra roughly equal to orbital length; postorbitofrontal fused; squamosal square, laterally expanded; infratemporal fenestra closed mainly by the enlarged jugal; interclavicle “T” shaped with straight stem; and fore− and hind feet webbed, with only the claws projecting. The combination of narrow, fused frontals, a short neck of only eight cervicals, a short rounded preorbital region, and closed lower temporal fenestrae differentiates Monjurosuchus from all other described choristoderes |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Late/Upper Hauterivian to the top of the Early/Lower Aptian or 132.60000 to 119.57000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Berriasian - Hauterivian | Japan (Ishikawa) | M. sp. (117468) | |
| Late/Upper Hauterivian - Aptian | Japan (Gifu) | M. sp. (50310) | |
| Late/Upper Barremian - Early/Lower Aptian | China (Liaoning) | M. splendens (13937 67611 73687 117527 117528) |