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Helioceratops brachygnathus
Taxonomy
Helioceratops brachygnathus was named by Jin et al. (2009). Its type specimen is JLUM L0204-Y-3, a mandible, and it is a 3D body fossil. Its type locality is Shanqian, Liufangzi, Gongzhuling quarry, which is in an Aptian/Albian fluvial-lacustrine mudstone/sandstone in the Quantou Formation of China. It is the type species of Helioceratops.
Synonymy list
| Year | Name and author |
|---|---|
| 2009 | Helioceratops brachygnathus Jin et al. pp. 200-201 figs. 2-3 |
| 2010 | Helioceratops brachygnathus Amiot et al. p. 355 |
| 2014 | Helioceratops brachygnathus Tanoue and Okazaki p. 80 |
| 2019 | Helioceratops brachygnathus Morschhauser et al. p. 134 |
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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.
†Helioceratops brachygnathus Jin et al. 2009
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Jin et al. 2009 | Non-coronosaurian Neoceratopia is characterized by the following autapomorhies: dentary ramus deep with a ratio "length of the tooth row/maximum height of dentary ramus" =1.6; ventral predentary facet more vertical than in other basal neoceratopians, forming an angle of approxiamtely 130° with the ventral border of the dentary ramus; and denticles and secondary ridges asymetrically ditributed on either side of the primaary ridge on the dentary teeth with up to nine secondary ridges on the mesial half and up to four in the distal half. |