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Asylosaurus yalensis

Reptilia

Taxonomy
Asylosaurus yalensis was named by Galton (2007). Its type specimen is YPM 2195, a set of postcrania, and it is a 3D body fossil. Its type locality is Durdham Down, Quarry Steps, which is in a Rhaetian fissure fill limestone/breccia in the Magnesian Conglomerate Formation of the United Kingdom.

It was considered a nomen dubium by Ballell et al. (2020).

Synonymy list
YearName and author
2007Asylosaurus yalensis Galton pp. 555-556 figs. 6A-D, 7B-F, 8A-F, 11A-C, 13, 14I-M, 15A-P, 17A-J, 19, 24F-J, 25A-F
2014Asylosaurus yalensis Marzola and Dalla Vecchia p. 13

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
RankNameAuthor
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Saurischia()
—Eusaurischia
—Sauropodomorpha(Huene 1932)
genusAsylosaurus
speciesyalensis

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.

†Asylosaurus yalensis Galton 2007
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Diagnosis
ReferenceDiagnosis
P. M. Galton 2007autapomorphies : deltopectoral crest symmetrical in lateral view with the gently rounded apex at 25 % (measured perpendicular to long axis of humerus) of humeral length, manus with lateral reduction so phalangeal formula 2-3-4-2-1, distally the thickest parts of the ischia are separated by a cleft that is Λ-shaped in dorsal view ; plesiomorphies : low deltopectoral crest (also in Pantydraco caducus but apex asymmetrical at 40 % of humeral length) with large medial tubercle adjacent to head (also in most basal sauropodomorphs, small in P. caducus), distal tarsal I transversely narrower than metatarsal I (occurs in no other basal sauropodomorph) and transversely narrow metacarpals I (and phalanx 1, also in Efraasia minor) and II-IV (also in E. minor and Anchisaurus polyzelus).