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Nqwebasaurus thwazi
Taxonomy
Nqwebasaurus thwazi was named by de Klerk et al. (2000). Its type specimen is AM 6040, a partial skeleton, and it is a 3D body fossil. Its type locality is 17 km west of Kirkwood, which is in a Berriasian/Valanginian terrestrial mudstone in the Kirkwood Formation of South Africa.
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Nqwebasaurus thwazi de Klerk et al. p. 325 figs. 2-4 |
| 2004 | Nqwebasaurus thwazi Holtz, Jr. et al. p. 76 |
| 2007 | Nqwebasaurus thwazi Gishlick and Gauthier p. 573 |
| 2009 | Nqwebasaurus thwazi Forster et al. p. 283 |
| 2010 | Nqwebasaurus thwazi Choiniere et al. p. 1792 |
| 2012 | Nqwebasaurus thwazi Choiniere et al. p. 2 |
| 2012 | Nqwebasaurus thwazi Galton and Molnar p. 17 |
| 2012 | Nqwebasaurus thwazi Le Loeuff et al. p. 488 |
| 2013 | Nqwebasaurus thwazi Fernandes de Azevedo et al. p. 137 |
| 2015 | Nqwebasaurus thwazi Alifanov and Saveliev p. 638 |
| 2016 | Nqwebasaurus thwazi Claessens and Loewen p. 1 |
| 2016 | Nqwebasaurus thwazi McFeeters et al. p. 17 fig. 14 |
| 2016 | Nqwebasaurus thwazi McPhee et al. p. 230 |
| 2017 | Nqwebasaurus thwazi Sereno p. 592–593 |
| 2018 | Nqwebasaurus thwazi Hunt and Quinn p. 4 |
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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.
†Nqwebasaurus thwazi de Klerk et al. 2000
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. de Klerk et al. 2000 | Basal coelurosaurian theropod possessing the following autapomorphies: ginglymus of metacarpal I very robust and asymmetrical, with hypertrophied articular surfaces and greatly enlarged lateral (ulnar) condyle; manual ungual phalanx of digit I elongate (length is four times proximal depth) and mediolaterally compressed; fibular shaft reduced distally to thin splint; metatarsal IV reduced in width to approximately half that of metatarsal III. | |
| J. N. Choiniere et al. 2012 |
In addition to the autapomorphies listed by de Klerk et al. (2000), Nqwebasaurus is diagnosed by: unserrated maxillary teeth set into a groove rather than separate alveoli; straight rather than recurved maxillary tooth crowns; maxillary tooth crowns conical rather than mediolaterally compressed; ridge on the lateral margin of the dorsal surface of the distal end of metacarpal I extending proximally from lateral condyle. | |
| P. C. Sereno 2017 | Basal ornithomimosaur with a well defined, elongate beveled edge on the orbital rim anterior to the postorbital, elongate dorsal centra (length approximately 3 times the centrum diameter), a crest on the distal shaft of metacarpal 1 (adjacent to metacarpal 2), metacarpal 1 with a lateral distal condyle twice as deep dorsoventrally as the medial condyle, unusually long unguals on manual digits II and III (the latter more than twice the length of the penultimate phalanx), and metatarsal 4 with a shaft approximately one half the transverse width of metatarsal 2. |
Measurements
No measurements are available
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| Source: infrao = infraorder | |||||
| Reference: Averianov and Yarkov 2004 | |||||
Age range: base of the Berriasian to the top of the Valanginian or 145.00000 to 132.90000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Berriasian - Valanginian | South Africa (Eastern Cape) | Nqwebasaurus thwazi (type locality: 51903) |