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Xenerodiops

Reptilia - Avetheropoda - Xenerodiopidae

Taxonomy

Synonymy list
YearName and author
1987Xenerodiops Rasmussen et al. p. 12 figs. Figs. 9-11

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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()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
RankNameAuthor
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Theropoda()
Neotheropoda
AverostraPaul 2002
Tetanurae
orderAvetheropoda
suborderCoelurosauria
Maniraptora
Paraves
classAves
PygostyliaChiappe 2002
Ornithothoraces
OrnithuromorphaChiappe et al. 1999
subclassOrnithurae
subclassNeornithesGadow 1893
Neognathae(Pycraft 1900)
NeoavesSibley et al. 1988
NatatoresBaird 1858
Steganograllatores
superorderCiconiimorphae
orderCiconiiformesBonaparte 1854
familyXenerodiopidae
genusXenerodiops

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
D. T. Rasmussen et al. 1987The rostrum is heavy and decurved, with
weU-defined lateral grooves that delimit a somewhat swollen
terminus, quite unlike the straight, sharply pointed rostrum of
herons. The dorsal bar is narrow and deep, and does not become
expanded and flattened posteriorly as in die Ardeidae. It
appears that die nasal septum may have been completely
ossified (aldiough it is broken posteriorly so this cannot be
determined with certainty), whereas in die Ardeidae diere is
practically no indication of an ossified nasal sepmm. The nasal
bars are thick and almost cylindrical, unlike the thin flattened
nasal bars in the Ardeidae. The posterolateral corner of die
premaxilla is a large, deep, posteriorly directed flange above
which the quadratojugal bar articulates at some distance
dorsally; in herons this is a slender process that runs under,
and is in contact widi, the quadratojugal bar. The humerus is
on first appraisal heron-like but more robust, with a more
expanded and triangular pectoral crest and a more rounded
bicipital crest that is much more distinctiy set off from die
shaft. Unlike herons or any of the "core" Ciconiiformes, the
tricipital fossa is excavated and not pneumatic, although there
are a few small foramina around die proximal margin, as in the
Phoenicopteridae.