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Aurorazhdarcho primordius

Reptilia - Protazhdarchidae

Taxonomy
Aurorazhdarcho primordius was named by Frey et al. (2011). Its type specimen is NMB Sh 110, a partial skeleton (a single articulated skull- and neckless specimen), and it is a 3D body fossil. Its type locality is Blumenberg quarry, Eichstätt (Peter Katschmekat collection, 1998), which is in a Tithonian lagoonal/restricted shallow subtidal lime mudstone in the Solnhofen Formation of Germany. It is the type species of Aurorazhdarcho.

Synonymy list
YearName and author
2011Aurorazhdarcho primordius Frey et al. p. S40 figs. 2-3
2013Aurorazhdarcho primordius Bennett

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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
RankNameAuthor
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
PterosauromorphaPadian 1997
Pterosauria(Kaup 1834)
suborderPterodactyloideaPlieninger 1901
Lophocratia
superfamilyOrnithocheiroideaSeeley 1870
superfamilyAzhdarchoideaUnwin 1992
familyProtazhdarchidae
genusAurorazhdarcho
speciesprimordius

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
E. Frey et al. 2011[As for family Protazhdarchidae and genus Auroazhdarcho]
S. C. Bennett 2013Upper Jurassic pterodactyloid with elongate skull, slender and elongated rostrum, and superior margin of the skull markedly concave upward; naso-antorbital fenestra length ~20–25% of skull length in small individuals; jaws of small individuals bearing up to 18 closely spaced, long, gently curving teeth per jaw side, anterior teeth angled anteriorly, posterior teeth shorter and more upright, and the upper and lower teeth interlocking to form a basket for sieving food items from water, but teeth shorter and stouter than in Ctenochasma. The skull is unknown in large individuals. Cervical vertebrae 3–7 of moderate length, and neck relatively shorter than in Pterodactylus and Ardeadactylus (shared with Ctenochasma and Cycnorhamphus). McIV exhibits marked positive allometry relative to the radius: in small specimens the radius length exceeds McIV length but the opposite is the case in middling to large specimens; in small to middling specimens WP2 is ~62–74% of WP1 length, in the large specimen 59%, and WP1-4 lengths typically exhibit a concave upward curve in modified Nopcsa curves (Fig. 11). In the pes, MtI is greater than MtII in length and the proximal phalanges of digit I–IV are subequal in length (shared with Ctenochasma).