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Chainosauria

Synonymy list
YearName and author
1923Chainosauria Nopcsa
2009Chainosauria Kammerer and Angielczyk
2010Chainosauria Angielczyk and Rubidge
2011Chainosauria Fröbisch and Reisz
2016Chainosauria Angielczyk et al.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
RankNameAuthor
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
Anomodontia(Owen 1859)
Chainosauria()
Chainosauria()

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
C. F. Kammerer and K. D. Angielczyk 2009The fact that neither Galepus nor Galechirus has been included in past phylogenetic analyses makes it difficult to identify autapomorphies of Chainosauria. Therefore, we use the synapomorphies presented by Modesto et al. (1999), Modesto & Rybczynski (2000), Rybczynski (2000), Modesto et al. (2003a), and Angielczyk (2004) for Galeops + Dicynodontia in their analyses as an approximate diagnosis of Chainosauria, although some of these features are almost certainly not diagnostic for the group as a whole (e.g., the presence of an edentulous beak). The most consistently cited autapomorphies are: (1) edentulous beak formed by the premaxilla and dentary present; (2) septomaxillary posterodorsal spur inconspicuous and nasal-maxilla suture well developed; (3) postorbital-squamosal contact present ventrally, with squamosal extending anteriorly beyond postorbital bar; (4) nasal boss present.