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Dilong paradoxus
Taxonomy
Dilong paradoxus was named by Xu et al. (2004). Its type specimen is IVPP V.14243. Its type locality is Lujiatun village 2, Yixian (IVPP), which is in a Barremian/Aptian fluvial-lacustrine sandstone in the Yixian Formation of China. It was considered monophyletic by Xu et al. (2004).
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Dilong paradoxus Xu et al. p. 680 figs. 1-3 |
| 2007 | Dilong paradoxus Naish and Martill p. 504 |
| 2009 | Dilong paradoxus Xing et al. p. 709 |
| 2009 | Dilong paradoxus Zanno et al. p. S15 |
| 2010 | Dilong paradoxus Chiappe and Göhlich p. 265 |
| 2011 | Dilong paradoxus Hone et al. p. 501 |
| 2012 | Dilong paradoxus Xing et al. p. 503 |
| 2013 | Dilong paradoxus Poropat and Kear p. 105 |
| 2013 | Dilong paradoxus Thomson et al. p. 71 |
| 2017 | Dilong paradoxus Carr et al. p. 9s |
| 2020 | Dilong paradoxus Yang et al. p. 2 |
| 2022 | Dilong paradoxus Krumenacker et al. p. 1339 |
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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.
†Dilong paradoxus Xu et al. 2004
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| X. Xu et al. 2004 | A small tyrannosauroid distinguishable from other tyrannosauroids by the unique presence of two large pneumatic recesses dorsal to the antorbital fossa on the maxilla, a Y-shaped crest formed by the nasals and lacrimals, an extremely long descending process of the squamosal extending close to the mandibular articulation of the quadrate, a lateral projection of the basisphenoid anterior to the basal tuber, very deep, sub-circular interspinous ligamentous fossae on cervical vertebrae, robust scapula with a wide distal end (distal end twice as wide as the proximal scapular blade) and a hypertrophied coracoid (dorsoventral length about 70% of the scapular length). |