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Rhacheosaurini

Reptilia - Metriorhynchidae

Taxonomy
Rhacheosaurini was named by Young et al. (2011). It is not extant. It was considered monophyletic by Parrilla-Bel et al. (2013).

It was assigned to Metriorhynchinae by Parrilla-Bel et al. (2013).

Synonymy list
YearName and author
2011Rhacheosaurini Young et al.
2013Rhacheosaurini Parrilla-Bel et al. pp. 3-4

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
RankNameAuthor
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
Pseudosuchia(Zittel 1890)
SuchiaKrebs 1974
Paracrocodylomorpha
Loricata(Merrem 1820)
Crocodylomorpha()
suborderCrocodyliformes
MesoeucrocodyliaWhetstone and Whybrow 1983
NeosuchiaClark 1988
suborderThalattosuchia
familyMetriorhynchidaeFitzinger 1843
subfamilyMetriorhynchinae
tribeRhacheosauriniYoung et al. 2011
tribeRhacheosauriniYoung et al. 2011

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.

Diagnosis
ReferenceDiagnosis
J. Parrilla-Bel et al. 2013Metriorhynchid crocodylomorphs with the following unique combination of characters (autapomorphic characters are indicated by an asterisk): posterodorsal retraction of external nares, with the anterior margin of the external nares starting posterior to the first premaxillary alveolus (ch. 7:3)*; development of premaxillary septum that divides the external nares along the skull midline (ch. 9:1)*; supratemporal fenestra subequal or shorter in length than orbits*; frontopostorbital suture lower than (ventral to) the intertemporal bar (ch. 60:1)*; infratemporal fenestra shorter in length than the orbit (ch. 86:2); paroccipital process dorsolaterally orientated, at an approximate 45 degree angle (ch. 104:1)*; teeth lack carinae (ch. 167:0); the anterior margin of both angular and surangular bones terminates anterior to the orbit (ch. 139–140:1)*; presacral vertebrae count increased by one (to 25) (ch. 178:1)*; number of caudal vertebrae increased by at least eight (>45); humerus shaft greatly reduced, contributing less than 25% of total humeral length (ch. 207:2); radius and ulna are subequal in size to the radiale and ulnare, respectively; tibia length greatly shortened, measuring less than 30% of femoral length (ch. 225:3).