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Pantydraco caducus
Taxonomy
Thecodontosaurus caducus was named by Yates (2003). Its type specimen is BMNH P24, a partial skeleton, and it is a 3D body fossil. Its type locality is Pant-y-ffynnon Quarry, Bonvilston, which is in a Carnian fissure fill limestone/marl in the United Kingdom.
It was recombined as Pantydraco caducus by Galton et al. (2007), Galton (2007), Bittencourt and Kellner (2009), Galton and Kermack (2010), Langer et al. (2010), Apaldetti et al. (2011), Delsate and Ezcurra (2014), Griffin and Nesbitt (2016) and Martill et al. (2016); it was synonymized subjectively with Thecodontosaurus antiquus by Galton (2005) and Ballell et al. (2020).
It was recombined as Pantydraco caducus by Galton et al. (2007), Galton (2007), Bittencourt and Kellner (2009), Galton and Kermack (2010), Langer et al. (2010), Apaldetti et al. (2011), Delsate and Ezcurra (2014), Griffin and Nesbitt (2016) and Martill et al. (2016); it was synonymized subjectively with Thecodontosaurus antiquus by Galton (2005) and Ballell et al. (2020).
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Thecodontosaurus caducus Yates pp. 2-21 figs. 1-21 |
| 2005 | Thecodontosaurus caducus Yates p. 117 |
| 2007 | Thecodontosaurus caducus Barrett et al. p. 321 |
| 2007 | Pantydraco caducus Galton p. 511 |
| 2007 | Pantydraco caducus Galton et al. p. 123 |
| 2007 | Thecodontosaurus caducus Naish and Martill p. 496 |
| 2007 | Thecodontosaurus caducus Upchurch et al. p. 76 |
| 2009 | Pantydraco caducus Bittencourt and Kellner p. 9 |
| 2010 | Pantydraco caducus Galton and Kermack |
| 2010 | Pantydraco caducus Langer et al. p. 71 |
| 2011 | Pantydraco caducus Apaldetti et al. p. 4 |
| 2014 | Pantydraco caducus Delsate and Ezcurra p. 177 |
| 2016 | Pantydraco caducus Griffin and Nesbitt p. 1 |
| 2016 | Pantydraco caducus Martill et al. p. 3 |
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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.
†Pantydraco caducus Yates 2003
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. M. Yates 2003 | A species of Thecodontosaurus with the following autapomorphy: pleurocoel-like pits on the neurocentral sutures of the sixth, seventh and eighth cervical vertebrae. T. caducus can be further distinguished from T. antiquus by exhibiting the plesiomorphic state for the autapomorphies of that species. These include a medial tubercle of the proximal humerus that does not project strongly (versus strongly projecting in T. antiquus) and a preacetabular process of the ilium that projects cranially (versus a downcurved preacetabular process in T. antiquus). | |
| P. M. Galton et al. 2007 | An autapomorphy is the pseudopleurocoel, the opening to the pneumatic cavity on the neurocentral suture of the sixth to eighth cervical vertebrae (Fig. 1C). Humerus plesiomorphic with a small tubercle medial to head and an anteroposteriorly low asymmetrical deltopectoral crest with the apex at 40% of humeral length (Fig. 1E-G). |