|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was reranked as the subfamily Hylaeochampsinae by Nopcsa (1928); it was reranked as the unranked clade Hylaeochampsidae by Buscalioni et al. (2011), Puértolas-Pascual et al. (2013) and Narváez et al. (2015).
It was assigned to Crocodilidae by Nopcsa (1928); to Eusuchia by Kuhn (1946), Kuhn (1966) and Carroll (1988); and to Eusuchia by Andrade et al. (2011), Buscalioni et al. (2011), Puértolas-Pascual et al. (2013) and Narváez et al. (2015).
|Year||Name and author|
|1928||Hylaeochampsinae Nopcsa p. 187|
|1946||Hylaeochampsidae Kuhn p. 64|
|1966||Hylaeochampsidae Kuhn p. 86|
|2011||Hylaeochampsidae Andrade et al.|
|2011||Hylaeochampsidae Buscalioni et al.|
|2013||Hylaeochampsidae Puértolas-Pascual et al.|
|2015||Hylaeochampsidae Narváez 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.
|A. D. Buscalioni et al. 2011||Small eusuchians with brevirostral skull and thickned cranial and postcranial bones. Premaxillary (unknown in Hylaeochampsa and in Pachycheilosuchus) and anterior maxillary alveolar series of subequal size, maxilla posteriorly extends in a process devoid of teeth, minimal sculpturing of maxillary surface, reduced number of maxillary teeth, prefrontal longer than lachrymal (differing in Pietraroiasuchus, whereby the prefrontal and lachrymal are the same size, and unknown in P. trinquei); extremely narrow suborbital fenestra (unambiguous synapomorphy for the clade); choana anteriorly set in pterygoid (unknown in P. trinquei), pterygoid flanges relatively short and not reaching laterally the level of the quadrate medial condyle (unknown in P. trinquei), extremely robust ectopterygoid with expanded jugal and maxilla sutures, protuberance in the ventral surface of the quadrate with prominent muscle scars (unambiguous synapomorphy for the clade); vertical ridge at the occipital surface (unambiguous synapomorphy for the clade, unknown in P. trinquei), reduced anteroposterior extension of the quadrate articular process that does not (but may almost) reach the level of the occipital condyle (unambiguous synapomorphy for the clade, unknown in P. trinquei), anterodorsal margin of surangular elevated and extended (unknown in Hylaeochampsa).|