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Scansoriopteryx heilmanni

Reptilia - Avetheropoda - Scansoriopterygidae

Taxonomy
Scansoriopteryx heilmanni was named by Czerkas and Yuan (2002). Its type specimen is CAGS02-IG-gausa-1/DM 607, a skeleton, and it is a compression fossil. Its type locality is Dawangzhangzi, which is in a Barremian lacustrine shale in the Yixian Formation of China.

Synonymy list
YearName and author
2002Scansoriopteryx heilmanni Czerkas and Yuan p. 64
2012Scansoriopteryx heilmanni Gao et al. p. 8

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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
RankNameAuthor
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Theropoda()
Neotheropoda
AverostraPaul 2002
Tetanurae
orderAvetheropoda
suborderCoelurosauria
Maniraptora
Avialae
familyScansoriopterygidae
genusScansoriopteryx
speciesheilmanni

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
S. A. Czerkas and C. Yuan 2002Scansoriopteryx heilmanni is the only known saurischian, or theropod, which has the third digit of the manus elongated to nearly twice that of the second digit. Scansoriopteryx closely resembles Archaeopteryx, but differs in the following: a definite contact between an elongate ventral process of the postorbital and the ascending process of the jugal; the lower jaw is equipped with a large fenestra; the tail has a greater development in the articulation of the zygapophyses. The pelvis is similar to that of Archaeopteryx in having the same number of sacrals and general shape of the ilia, but differs in having a small, unexpanded pubic peduncle; a significantly short pubis which is not retroverted; longer ischia; and an acetabulum which is not entirely perforated. Also unlike Archaeopteryx, the posterior end of the scapula is expanded; separate clavicles are present instead of a furcula; and the foot is more capable of perching as indicated by its having a longer hallux, and the reduced lengths of the middle phalanges in digits III and IV of the pes.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: solitaryo
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: carnivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:39:15
Modified: 2009-01-03 22:39:15
Source: subo = suborder, o = order
References: Benton 1983, Marsh 1875

Age range: Barremian or 129.40000 to 125.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Barremian129.4 - 125.0China (Liaoning) Scansoriopteryx heilmanni (type locality: 13937)