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Eutretauranosuchus
Taxonomy
Eutretauranosuchus was named by Mook (1967). Its type is Eutretauranosuchus delfsi.
It was assigned to Mesoeucrocodylia by Pol and Norell (2004); to Goniopholidae by Mook (1967), Martin and Buffetaut (2012), Pritchard et al. (2013); to Neosuchia by Turner (2006), Zaher et al. (2006), Larsson and Sues (2007), Fiorelli and Calvo (2008), Nascimento and Zaher (2011), Sertich and O'Connor (2014); and to Goniopholididae by Tykoski et al. (2002), Lauprasert et al. (2007), Smith et al. (2010), Andrade et al. (2011), Bronzati et al. (2012), Puértolas-Pascual et al. (2015).
It was assigned to Mesoeucrocodylia by Pol and Norell (2004); to Goniopholidae by Mook (1967), Martin and Buffetaut (2012), Pritchard et al. (2013); to Neosuchia by Turner (2006), Zaher et al. (2006), Larsson and Sues (2007), Fiorelli and Calvo (2008), Nascimento and Zaher (2011), Sertich and O'Connor (2014); and to Goniopholididae by Tykoski et al. (2002), Lauprasert et al. (2007), Smith et al. (2010), Andrade et al. (2011), Bronzati et al. (2012), Puértolas-Pascual et al. (2015).
Species
E. delfsi (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1967 | Eutretauranosuchus Mook p. 2 |
| 2002 | Eutretauranosuchus Tykoski et al. |
| 2004 | Eutretauranosuchus Pol and Norell |
| 2006 | Eutretauranosuchus Turner |
| 2006 | Eutretauranosuchus Zaher et al. |
| 2007 | Eutretauranosuchus Larsson and Sues |
| 2007 | Eutretauranosuchus Lauprasert et al. p. 202 |
| 2008 | Eutretauranosuchus Fiorelli and Calvo |
| 2010 | Eutretauranosuchus Smith et al. |
| 2011 | Eutretauranosuchus Andrade et al. |
| 2011 | Eutretauranosuchus Nascimento and Zaher |
| 2012 | Eutretauranosuchus Bronzati et al. |
| 2012 | Eutretauranosuchus Martin and Buffetaut |
| 2013 | Eutretauranosuchus Pritchard et al. |
| 2014 | Eutretauranosuchus Sertich and O'Connor |
| 2015 | Eutretauranosuchus Puértolas-Pascual 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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. C. Mook 1967 | The skull is moderately long in proportion to its breadth. There is a pronounced depression at the base of the snout, and slightly developed preorbital ridges, suggesting the condition in the living caimans. The postorbital bars were clearly subdermal. The prefrontal bones extend farther forward than the frontal. The nasal bones widen anterior to the prefrontal tips. The nasal bones do not enter the external narial aperture at the surface. The frontal bone extends forward to the level of the eleventh maxillary teeth. The frontoparietal suture is located rather far back, permitting a considerable participation of the frontal in the anterior borders of the supratemporal fenestrae. The interfenestral bar is relatively broad and flat, and its edges are slightly uprolled. The supratemporal fenestrae are of moderate size. They are elongate oval in shape. The quadratojugal bones have sharp spines, resembling those of Crocodylus.
The internal narial aperture is unusually long and slender, its length being several times its breadth, and relatively much longer than in other crocodilians of its general size. It appears to be divided, at the palatal surface, at least, by a slender bar of bone. The composition of this bone is not clear, but it may be made of slender anterior processes of the pterygoid. Anterior to the internal narial aperture is another opening, similar in character to it, but smaller. Like the internal nares it is divided by two slender bones, which appear to be processes of the palatines. The presence of this opening is unique among crocodilians. The palatine fenestrae are large and are broad anteriorly. Their anterior ends lie opposite the eighteenth maxillary teeth. The pterygoid, omitting the anterior processes mentioned above, is short and broad. The palatine bones extend forward to the level of the thirteenth maxillary teeth. The lower jaw is long, slender and unusually low anteriorly. The symphysis includes eight mandibular teeth on each side. The splenial bones enter the symphysis. They extend forward to the level of the seventh mandibular teeth. Twenty-four alveoli are present in each ramus. Of these numbers 3 and 4 are slightly larger than the rest which are subequal in size. Numbers 1 and 2 appear to open on the external surface of the jaw. The first eighteen alveoli have separate walls, nineteen to twenty-four merge together. Numbers 5 to 11 are visible from the side. The external mandibular fenestrae are small and are oblique in position. They are much longer than high. The anterior internal fenestra is moderately large and the posterior one is small. The articular process is excessively short and the articular surface, that articulated with the quadrate, is also very short. The teeth, such as they are preserved, are rather small, are striated, and slightly bladed. The posterior external portions of both rami are distinctly pitted, the anterior portions only slightly so. The vertebrae are amphicoelous, and are goniopholid in character. The limb bones are typically crocodilian and appear to be rather short for their breadth and in proportion to the dimensions of the skull and vertebrae. |