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Chaoyangodens lii
Taxonomy
Chaoyangodens lii was named by Hou and Meng (2014). Its type specimen is JZT005-2010, Ji-Zan-Tang Paleontological Museum, Chaoyang, Liaoning, a skeleton (A skeleton preserved in a laminated siltstone that is split into two slabs), and it is a 3D body fossil. Its type locality is Dawangzhangzi, which is in a Barremian/Aptian lacustrine shale in the Yixian Formation of China. It is the type species of Chaoyangodens.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Chaoyangodens lii Hou and Meng p. 547 figs. 1-3 |
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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.
†Chaoyangodens lii Hou and Meng 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Hou and J. Meng 2014 | A small eutriconodont with the body length 109 mm from the tip of rostrum to the end of the ischium; typical triconodont postcanine teeth with three main cusps aligned mesiodistally; differing from Sinoconodon and morganucodontids in lacking a post-dentary trough but retaining the ossified Meckel’s cartilage; tooth formula I5-C1-P1-M3/i4-c1-p1-m4; unique among eutriconodonts in having only one premolar in lower and upper jaws, respectively, and a diastema between the canine and the premolar in both upper and lower jaws; further differing from gobiconodontids in lacking enlarged first lower incisors, from amphilestids in having asymmetrical cheek teeth in lateral view, and from triconodontids in having cusps a and A significantly higher than other main cusps; further differing from Yanoconodon and Liaoconodon in having more and smaller incisors; further differing from Liaoconodon and Repenomamus in being smaller and having small incisors and less inflated cheek teeth that have distinctive cingula; further differing from Jeholodens in having larger and vertical lower and upper canines, cusp a of lower molar occluding between two upper molars and a triangular scapula. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Luo et al. 2003, Hopson 1973, Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Late/Upper Barremian to the top of the Early/Lower Aptian or 130.00000 to 122.46000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Barremian - Early/Lower Aptian | China (Liaoning) | Chaoyangodens lii (type locality: 13937) |