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Pietraroiasuchus
Taxonomy
Pietraroiasuchus was named by Buscalioni et al. (2011). Its type is Pietraroiasuchus ormezzanoi.
It was assigned to Neosuchia by Narváez et al. (2015); and to Hylaeochampsidae by Buscalioni et al. (2011), Puértolas-Pascual et al. (2013), Jouve et al. (2019).
It was assigned to Neosuchia by Narváez et al. (2015); and to Hylaeochampsidae by Buscalioni et al. (2011), Puértolas-Pascual et al. (2013), Jouve et al. (2019).
Species
P. ormezzanoi (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2011 | Pietraroiasuchus Buscalioni et al. p. S203 |
| 2013 | Pietraroiasuchus Puértolas-Pascual et al. |
| 2015 | Pietraroiasuchus Narváez et al. |
| 2019 | Pietraroiasuchus Jouve 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.
G. †Pietraroiasuchus Buscalioni et al. 2011
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†Pietraroiasuchus ormezzanoi Buscalioni et al. 2011
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. D. Buscalioni et al. 2011 | Small crocodylomorph about 1 m long, with flat skull (rostrum and mandible) and round rostral contour. Rostral profile convex in front of orbits; orbits with anterior rectilinear contour; premaxillary constituting about one-third of rostral length; maxillary alveoli medially placed and laterally bordered by a ridge (shared with Pachycheilosuchus); three final maxillary teeth medially arranged in a platform (autapomorphy); maxillary bone with minimal sculpture and pitting aligned along lateral margins; maxillae send a short caudal process between the lachrymal and prefrontal, thus avoiding lachrymonasal contact; maxillary tooth row ends well anterior to posterior tip of maxilla; posteromedial edge of maxillae forming the margin of a depression or fossa in front of the maxillojugal suture; prefrontal and lachrymal about same length; preorbital fenestra slit-like; choana in pterygoid, anteriorly placed, and bordered by palatines; compound quadrate– quadratojugal condyles (autapomorphy); furrowed quadratojugal and quadrate suture (autapomorphy); pterygoidean flange not reaching laterally the medial quadrate condyle (shared with Iharkutosuchus); lateroventral protuberance in exoccipitals form a vertical ridge (shared with Hylaeochampsa and Iharkutosuchus); unforked and unique posterior dentary process (shared with Pachycheilosuchus); medial extension of dentary; surangular anterodorsally expanded; posterodorsal smooth dentary projection lacking alveolar setting; homodont dentition; absence of external mandibular fenestra. Postcranial skeleton is characterized by slightly procoelous centra, being more pronounced in cervicals; anteroposteriorly, expansions of transverse processes in thoracic area; tail longer than the combined length of skull and presacrum; forelimb more slender and shorter than hindlimbs, with stout femora; humerus with straight shaft and distal condyles of similar transverse extension; long anterior dorsal end of coracoid twice the length of its ventral edge; nuchal shield separated from dorsal shield and composed of a compound set of six profusely ornamented osteoderms (two parasagittal rows and one lateral) (shared with Pachycheilosuchus); dorsal dermal skeleton composed of tetraserial paravertebral shield and one accessory osteoderm. |