New Araripesuchus Remains from the Early Late Cretaceous (Cenomanian–Turonian) of Patagonia

By D. Pol, S. Apesteguía. 2005

115 citations recorded by the source corpus.

Abstract Two new crocodyliform specimens found in a recently discovered locality from the Late Cretaceous of Patagonia (Argentina) are described herein. One of them comprises an almost complete skull found in articulation with the lower jaws, while the other consists of the anterior region of the lower jaws and fragmentary remains of the palate. These two specimens differ in the morphology of their lower jaws (e.g., height of mandibular symphysis, pattern of ornamentation on ventral surface of mandibular ramus, concavity of medial surface of splenials, shape of splenial-dentary suture on ventral surface of mandibular symphysis) and probably belong to different taxa. The more complete specimen is considered to be a new taxon, Araripesuchus buitreraensis, diagnosed by the combination of the following characters (autapomorphic characters are indicated with an asterisk): long and acute anterior process of frontals extending anteriorly between the nasals; frontals extending into supratemporal fenestra; narrow parietal dorsal surface between supratemporal fossa; anterior palpebral remarkably broad; large siphoneal foramen in otic recess; T-shaped choanal septum that completely divides the internal nares, having its anterior end as broad as the midregion of the septum*; pterygoid flanges pneumatic and poorly expanded at its lateral end*; transversely elongated depression on ventral surface of pterygoid flanges close to the posterior margin of suborbital fenestra*; longitudinal groove on flat lateral surface of dentaries below toothrow. The second, more fragmentary specimen might represent a different new taxon, although more material is needed in order to make a justified taxonomic decision. The phylogenetic relationships of both specimens are analyzed through a comprehensive cladistic analysis including 50 crocodylomorph taxa. All the most parsimonious hypotheses depict both specimens as closely related to the previously known South American species of Araripesuchus (A. gomesii and A. patagonicus). This group is depicted as the most basal clade of notosuchians, the most diverse group of Cretaceous mesoeucrocodylians from Gondwana.

Subfields: Nature and Landscape Conservation, Paleontology

View Paper: https://www.semanticscholar.org/paper/6da8a03e5507a4297c355a078ec67f1825de0d38

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In Nature and Landscape Conservation

1. J. Sertich
2. A. Turner
3. Marco Brandalise de Andrade
4. S. Jouve
5. A. Ősi
6. D. Pol
7. G. Buckley
8. R. Bertini

In Paleontology

1. J. Sertich
2. A. Turner
3. Marco Brandalise de Andrade
4. A. Ősi
5. D. Pol
6. S. Jouve
7. G. Buckley
8. R. Bertini

Citations in the corpus

• Postcranial Anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia (2012, background): “…than to Notosuchia in most phylogenetic studies (Buckley and Brochu, 1999; Buckley et al., 2000; Ortega et al., 2000; Pol et al., 2004; Pol and Apesteguia, 2005; Turner and Calvo, 2005; Turner, 2006; Larsson and Sues, 2007; Turner and Buckley, 2008; Pol et al., 2009; Sereno and…”
• Splendid and Seldom Isolated: The Paleobiogeography of Patagonia (2013, background): “Significant Patagonian genera included the smallbodied Araripesuchus and Notosuchus (Woodward 1896, Ortega et al. 2000, Pol & Apesteguı́a 2005, Pol & Gasparini 2007); the members of the carnivorous baurusuchid lineage, Cynodontosuchus and Wargosuchus (Woodward 1896, Martinelli & Pais 2008); and the…”
• Osteology and phylogeny of a new species of Araripesuchus (Crocodyliformes: Mesoeucrocodylia) from the Late Cretaceous of Madagascar (2006, background): “There has been no doubt about the sister relationship between A. gomesii and A. patagonicus (Ortega et al. 2000, Pol 2003, Pol and Norell 2003, Turner 2004).”
• A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described for the family Baurusuchidae (2010, background): “…Baurusuchidae has been consistently found to be nested within No‑ tosuchia (Ortega et al., 2000; Sereno et al., 2003; Pol, 2003; Pol & Norell, 2004; Pol & Apesteguia, 2005; Gasparini et al., 2005; Zaher et al., 2006; Andrade & Bertini, 2008), a clade originally erected by Gasparini (1971) to…”
• The Skull of Teleosaurus cadomensis (Crocodylomorpha; Thalattosuchia), and Phylogenetic Analysis of Thalattosuchia (2009, background): “…Brochu, 1999; Ortega et al., 2000; Larsson and Gado, 2000; Brochu et al., 2002; Pol, 2003; Jouve, 2004; Pol and Norell, 2004a, b; Pol et al., 2004; Pol and Apesteguia, 2005; Gasparini et al., 2005; Jouve et al., 2006), Thalattosuchia is included in Neosuchia, forming a ‘longirostrine clade’ with…”
• Phylogenetic History of Simosuchus clarki (Crocodyliformes: Notosuchia) from the Late Cretaceous of Madagascar (2010, background): “A host of data sets that have extended the Clark (1994) data set (eg, Pol, 2003 ; Pol and Norell, 2004a , 2004b; Pol and Apesteguia, 2005 ; Gasparini et al, 2006 ; Turner and Buckley, 2008 ; Pol et al, 2009 ) consistently recover Simosuchus as basal among notosuchians but in a more derived”
• The evolution of jaw mechanism and dental function in heterodont crocodyliforms (2014, background): “Although the phylogenetic position and monophyly of ‘araripesuchids’ are highly debated (see e.g. Ortega et al. 2000; Pol and Apesteguia 2005; Turner 2006; Sereno and Larsson 2009; Martin et al. 2010; Iori and Carvalho 2011; Soto et al. 2011), recent analyses (Sereno and Larsson 2009; O’Connor et al”
• Mahajangasuchus insignis (Crocodyliformes: Mesoeucrocodylia) Cranial Anatomy And New Data On The Origin Of The Eusuchian-Style Palate (2008, background): “Character 193 (Pol and Apesteguia, 2005: char.”
• Redescription of the Cranial Morphology of Mariliasuchus Amarali, and Its Phylogenetic Affinities (crocodyliformes, Notosuchia) (2006, background): “, 2000; Turner, 2004), the genus Araripesuchus appears as the basalmost notosuchian instead of being a basal member of Neosuchia, as in a recent analysis (Pol and Apesteguı́a, 2005).”
• The Epipterygoid of Crocodyliforms and Its Significance for the Evolution of the Orbitotemporal Region of Eusuchians (2009, background): “The mesoeucrocodylian Araripesuchus sp. (e.g., AMNH 24450, UC specimen; Ortega et al., 2000; Pol and Apesteguia, 2005; Turner, 2006) has a completely sutured pala- tocranial junction and a prominent epipterygoid (Fig.”
• A new Sphagesaurus (Mesoeucrocodylia: Notosuchia) from the Upper Cretaceous of Monte Alto City (Bauru Group, Brazil), and a revision of the Sphagesauridae (2008, background): “Chimaerasuchus does not figure as sister-group to Sphagesauridae, as usually presented by several other works (Pol 2003; Pol and Norell 2004a, 2004b; Pol and Apesteguia 2005; Zaher et al. 2006), but instead it occupies a more basal position in the topology, as Baurusuchidae.”
• A new Berriasian species of Goniopholis (Mesoeucrocodylia, Neosuchia) from England, and a review of the genus (2011, background): “…[length = 2186; consistency index (CI) = 0.2903; homoplasy index (HI) = 0.7097; retention index (RI) = 0.7626; rescaled consistency index (RC) = 0.2254], diverging only in the position of the notosuchian Araripesuchus buitreraensis Pol & Apesteguia, 2005, and summarized by a strict consensus (Fig.”