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Tonsala buchanani

Reptilia - Avetheropoda - Plotopteridae

Taxonomy
Tonsala buchanani was named by Dyke et al. (2011). Its type specimen is UWBM 86875 and is a 3D body fossil. Its type locality is Murdock Creek, which is in a Chattian deep-water siltstone in the Pysht Formation of Washington.

Synonymy list
YearName and author
2011Tonsala buchanani Dyke et al. p. 2 figs. Fig. 2
2015Tonsala buchanani Kaiser et al. p. 8 figs. Table 1

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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
RankNameAuthor
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Theropoda()
Neotheropoda
AverostraPaul 2002
Tetanurae
orderAvetheropoda
suborderCoelurosauria
Maniraptora
Paraves
classAves
orderSuliformesSharpe 1891
familyPlotopteridae
subfamilyTonsalinae
genusTonsala
speciesbuchanani

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
G. J. Dyke et al. 2011The characters listed here differentiate Tonsala buchanani from its counterpart, T. hildegardae Olson, 1980. Humerus: Shallow fossa m. brachialis in caudal view (cf. USNM 256518, where this fossa is deeper and more rounded); margin between crista brachialis and humeral shaft almost 90 degrees (this angle is markedly greater than 90 degrees in USNM 256518; Olson, 1980: fig. 2); sulcus ligamentous transversus extends all the way across the cranial surface of the proximal humerus (this sulcus does not reach the impressio coracobrachialis in USNM 256518). Coracoids much larger in size (Table 1). Carpometacarpus: processus extensorius rounded and blunt (not upturned as in T. hildegardae); os metacarpale alulare extends distally down the length of the element as a flat shelf; fossa infratrochlearis of carpometacarpus deep above processus pisiformis (this region not as excavated in T. hildegardae); cranial margin between trochlea carpalis and processus pisiformis narrow (wider in T. hildegardae).