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Cerrejonisuchus improcerus
Taxonomy
Cerrejonisuchus improcerus was named by Hastings et al. (2010). Its type specimen is UF/IGM 29, a skull, and it is a 3D body fossil. Its type locality is La Puente Pit, which is in a Paleocene/Paleocene delta plain claystone/sandstone in the Cerrejón Formation of Colombia.
Synonymy list
| Year | Name and author |
|---|---|
| 2010 | Cerrejonisuchus improcerus Hastings et al. |
| 2012 | Cerrejonisuchus improcerus Bronzati et al. |
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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.
†Cerrejonisuchus improcerus Hastings et al. 2010
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Hastings et al. 2010 | "Shorter snout, approximately 54–59% of the dorsal skull length, than that of all other known dyrosaurids. Also differs from all other dyrosaurids in having approximatly 11 teeth in each maxillary, 8 of which are anterior to the orbits. Further differs from all known dyrosaurids except Chenanisuchus in having a wide interfenestral bar that is square-shaped in cross-section. Further differs from all other dyrosaurids except Phosphatosaurus (and possibly Arambourgisuchus) in having a reduced fourth premaxillary tooth. Further differs from Phosphatosaurus and Sokotosuchus in lacking a ‘festooned’ lateral margin of the snout in dorsal view. Further differs from Hyposaurus, Rhabdognathus, Atlantosuchus, and Guarinisuchus in having a mediolaterally straight posterodorsal margin of the parietal. Further differs from Chenanisuchus and Sokotosuchus in having well-developed occipital tuberosities. Further differs from Chenanisuchus in hav-ing ornamentation continuous across dorsal and lateral surfaces with no interruption across sutures and orbits medially and dorsally placed, most closely approximating the orbit position of Dyrosaurus. Further differs from Hyposaurus rogersii in having teeth with straight, rather than twisted anterior carinae." Hastings et al. (2010): 141 |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Benton 1983, Bush and Bambach 2015, Carroll 1988 | |||||
Age range: base of the Middle Paleocene to the top of the Late/Upper Paleocene or 61.66000 to 56.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Paleocene - Late/Upper Paleocene | Colombia (Guajira) | Cerrejonisuchus improcerus (type locality: 106271) |