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Jianianhualong tengi
Taxonomy
Jianianhualong tengi was named by Xu et al. (2017). Its type specimen is DLXH 1218, a skeleton (A nearly complete skeleton with associated feathers), and it is a compression preserving soft parts. Its type locality is Baicaigou, Toutai, which is in a Barremian/Aptian lacustrine shale/mudstone in the Yixian Formation of China. It is the type species of Jianianhualong.
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Jianianhualong tengi Xu et al. |
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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.
†Jianianhualong tengi Xu et al. 2017
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| X. Xu et al. 2017 | A troodontid distinguishable from other taxa in possessing the following apomorphic features (*indicates autapomorphic feature): maxillary rostral ramus triangular in outline and relatively high dorsoventrally*; maxillary ascending process extending posterodorsally at a high angle (an angle of ∼45° to maxillary ventral margin)*; lacrimal with a long descending process sub-equal in length to anterior process; a prominent ridge along anterior edge of the lateral surface of the lacrimal descending process; a distinct fossa on the dorsal surface of the surangular close to its posterior end; axial neural spine with a convex dorsal margin, transversely thickened anterior margin, and posterodorsal portion expanding strongly posteriorly; long manual phalanx II-1 (slightly shorter than metacarpal III) with prominent proximoventral heel, large groove along the medial surface of more than proximal half of manual phalanx II-1*; highly elongated manual III-2 (slightly longer than metacarpal III)*; robust ungual phalanges (medial ungual proximal depth/ungual length ratio >0.5); ilium with slightly concave dorsal margin in lateral view*; small medial lamina along ischial obturator process dorsal margin; metatarsal IV without prominent ventral flange. |
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Marsh 1875, Holtz et al. 2000 | |||||
Age range: base of the Late/Upper Barremian to the top of the Early/Lower Aptian or 125.77000 to 119.57000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Barremian - Early/Lower Aptian | China (Liaoning) | Jianianhualong tengi (type locality: 67611) |