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Scansoriopteryx heilmanni
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/Aptian lacustrine shale in the Yixian Formation of China.
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Scansoriopteryx heilmanni Czerkas and Yuan p. 64 |
| 2012 | Scansoriopteryx heilmanni Gao et al. p. 8 |
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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.
†Scansoriopteryx heilmanni Czerkas and Yuan 2002
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. A. Czerkas and C. Yuan 2002 | Scansoriopteryx 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
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| Source: subo = suborder, o = order | |||||
| References: Kiessling 2004, Marsh 1875, Benton 1983 | |||||
Age range: base of the Late/Upper Barremian to the top of the Early/Lower Aptian or 125.77000 to 119.57000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Barremian - Early/Lower Aptian | China (Liaoning) | Scansoriopteryx heilmanni (type locality: 13937) |