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Hylaeochampsidae
Taxonomy
Hylaeochampsidae was named by Williston (1925). It was considered monophyletic by Buscalioni et al. (2011).
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), Narváez et al. (2015) and Rio and Mannion (2021).
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), Narváez et al. (2015) and Rio and Mannion (2021).
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), Narváez et al. (2015) and Rio and Mannion (2021).
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), Narváez et al. (2015) and Rio and Mannion (2021).
Synonymy list
| Year | Name and author |
|---|---|
| 1925 | Hylaeochampsidae Williston |
| 1928 | Hylaeochampsinae Nopcsa p. 187 |
| 1946 | Hylaeochampsidae Kuhn p. 64 |
| 1966 | Hylaeochampsidae Kuhn p. 86 |
| 1988 | Hylaeochampsidae Carroll |
| 2011 | Hylaeochampsidae Andrade et al. |
| 2011 | Hylaeochampsidae Buscalioni et al. |
| 2013 | Hylaeochampsidae Puértolas-Pascual et al. |
| 2015 | Hylaeochampsidae Narváez et al. |
| 2021 | Hylaeochampsidae Rio and Mannion |
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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.
Unr. †Hylaeochampsidae Williston 1925
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G. †Acynodon Buscalioni et al. 1997
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†Acynodon adriaticus Delfino et al. 2008
†Acynodon iberoccitanus Buscalioni et al. 1997
†Acynodon lopezi Buscalioni et al. 1997
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 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). |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Bush and Bambach 2015, Benton 1983, Carroll 1988 | |||||
Age range: base of the Bathonian to the top of the Late/Upper Maastrichtian or 168.30000 to 66.00000 Ma
Collections (28 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bathonian | United Kingdom (Scotland) | Hylaeochampsidae indet. (186682) | |
| Hauterivian - Late/Upper Barremian | Spain (Aragón) | Unasuchus sp. (232352) | |
| Late/Upper Barremian | Turkey (Zonguldak) | Turcosuchus okani (193639) | |
| Late/Upper Barremian | Spain (Cuenca) | Unasuchus reginae (61319) | |
| Late/Upper Barremian - Early/Lower Aptian | United Kingdom (England) | Hylaeochampsa vectiana (118045) | |
| Early/Lower Albian | Italy (Campania) | Mesoeucrocodylia indet. (112631) | |
| Early/Lower Albian | USA (Texas) | Pachycheilosuchus trinquei (31172) | |
| Santonian | Hungary (Veszprém) | Crocodylia indet. (48722) Iharkutosuchus makadii (173313) | |
| Early/Lower Campanian - Middle Campanian | Italy (Friuli-Venezia Giulia) | Crocodylia indet. (13286) | |
| Late/Upper Campanian | Spain (Castilla y Leon) | Acynodon iberoccitanus (28765) Alligatoridae indet. (28406) | |
| Late/Upper Campanian | France (Provence-Alpes-Côte d'Azur) | Acynodon sp. (89990) Crocodylidae indet. (28454) | |
| Middle Campanian | France (Provence-Alpes-Côte d'Azur) | Acynodon iberoccitanus, Alligatoridae indet. (59269) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | France (Languedoc-Roussillon) | Acynodon iberoccitanus (48870 59687) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Spain (Valencia) | Acynodon sp. (53918) | |
| Early/Lower Maastrichtian | Romania (Hunedoara) | Acynodon sp. (97948 163322 193942 193946) | |
| Early/Lower Maastrichtian | Romania (Alba) | Crocodylia indet. (115074) | |
| Early/Lower Maastrichtian | Spain (Castilla y Leon) | Acynodon lopezi (61321) | |
| Late/Upper Maastrichtian | Spain (Aragón) | Acynodon sp. (45437) | |
| Late/Upper Maastrichtian | Romania (Hunedoara) | Acynodon sp. (193944 219186) | |
| Late/Upper Maastrichtian - Danian | Slovenia (Obalno-Kraska) | Crocodylia indet. (67198) |