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Montealtosuchus arrudacamposi

Reptilia

Taxonomy
Montealtosuchus arrudacamposi was named by Carvalho et al. (2007). Its type specimen is MPMA-16-0007-04, a partial skeleton (Skull, mandible and almost complete axial and appendicular skeleton, and articulated dorsal and ventral exoskeleton (osteoderms).), and it is a 3D body fossil. Its type locality is Rural road at Monte Alto and Taiaçu border, which is in a Campanian/Maastrichtian fine channel fill sandstone in the Adamantina Formation of Brazil.

Synonymy list
YearName and author
2007Montealtosuchus arrudacamposi Carvalho et al.
2011Montealtosuchus arrudacamposi Carvalho et al.
2012Montealtosuchus arrudacamposi Bronzati et al.
2014Montealtosuchus arrudacamposi Sertich and O'Connor

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Eugnathostomata
—Teleostomi(Bonaparte 1836)
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
—Pseudosuchia(Zittel 1890)
—SuchiaKrebs 1974
—Paracrocodylomorpha
—Loricata(Merrem 1820)
—Crocodylomorpha()
—Solidocrania
suborderCrocodyliformes
—MesoeucrocodyliaWhetstone and Whybrow 1983
infraorderNotosuchiaGasparini 1971
—ZiphosuchiaOrtega et al. 2000
—Sebecia
—Peirosauridae(Gasparini 1982)
genusMontealtosuchus
speciesarrudacamposi

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.

†Montealtosuchus arrudacamposi Carvalho et al. 2007
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Diagnosis
ReferenceDiagnosis
I. d. S. Carvalho et al. 2007Snout moderately narrow, tubular in cross-section. Skull triangular in dorsal view. Anterior nasal process at the tip of snout, hanging over the external naris. Continuously sloping surface connecting the rostrum and skull table. A small slit-shaped notch for the 4th mandibular tooth at the contact between maxilla and premaxilla. Five premaxillary conical teeth progressively increase in size posteriorly, all evenly spaced. Wedge-like maxillary process of the premaxilla present. Foramen incisivum with maxillary marginal contribution. Fourteen maxillary teeth in sinuous outline, with moderate heterodonty, displaying anterior sharp conical teeth and posterior low, laterally compressed globular teeth. Anterolateral external nares in vertical position. Nasals participating in a non-septate external nares. Orbits subsquare. Antorbital fenestrae present. Two triangular supraorbitals bordering dorsally the orbit. Postorbital bar ascending from the mesial border of the jugal. Supratemporal fenestrae elliptical, smaller than orbits, and set in a non-sculptured depression, bordered by the parietal, postorbital, squamosal and small contribution of the frontal. Supratemporal with minimal participation in skull table. Quadratojugal participates with the quadrate in skull-mandible articulation. Deep, square choanae, evenly composed by palatines and pterygoids. Palatine fenestrae elliptical, bordered by maxillae, palatines, ectopterygoids and pterygoids. Basioccipitals inclined toward the palatal surface. Exoccipitals wide and bend anteriorly and half of its height. Eustachian foramina closely disposed in “v” pattern, in the palatal view. Splenials participating in 1/3 of the symphysis. Symphysis extending to the 10th tooth. Mandible arched upward at anterior and posterior ends. Articular presents deep concave articular surface, with contribution from the surangular. Retroarticular process paddle shaped and inclined dorsally and mesially. Mandibular fenestrae elliptical, aligned with the laterotemporal fenestrae. Eighteen dentary teeth show two morphotypes: anterior ones conical and sharp, with hypertrophied 4th tooth; posterior teeth globular, low, and laterally compressed. All premaxillary, except the first, maxillary and dentary teeth bear constricted basal crown and fine serrated carinae.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: marineuc
Locomotion: actively mobilep
Diet: carnivoresubo
Created: 2017-04-17 10:39:01
Modified: 2017-04-17 10:39:01
Source: subo = suborder, subp = subphylum, p = phylum, uc = unranked clade
References: Kiessling 2004, Benton 1983, Carroll 1988, Bush and Bambach 2015

Age range: base of the Late/Upper Campanian to the top of the Early/Lower Maastrichtian or 83.60000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian - Early/Lower Maastrichtian83.6 - 66.0Brazil (São Paulo) Montealtosuchus arrudacamposi (type locality: 114829)