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Chianghsia nankangensis
Taxonomy
Chianghsia nankangensis was named by Mo et al. (2012). Its type specimen is NHMG 009318 (Guangxi Natural History Museum, Zoology Collection), a partial skull (a partial skull and lower jaws), and it is a 3D body fossil. Its type locality is Nankang road cut, which is in a Maastrichtian terrestrial mudstone/sandstone in China.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Chianghsia nankangensis Mo et al. pp. 334-338 figs. 2-4 |
| 2016 | Chianghsia nankangensis Wang et al. p. 2 |
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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.
†Chianghsia nankangensis Mo et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. -Y. Mo et al. 2012 | Platynotan lizard (sensu Conrad 2008) uniquely combining large size (> 1 m snout–vent length (SVL)); blunt rostrum; substantial dentary–postdentary overlap; rounded and pitted cranial osteoderms attached, but not co-ossified, to lower jaws, and fused to some dorsal skull elements; four to five functional teeth on each maxilla and dentary; teeth large, high-crowned, laterally compressed and widely spaced with basal infolding. Chianghsia resembles other platynotans in the U-shaped palatine, septomaxilla partially flooring the narial opening, a narrow elongate vomer, anteroposteriorly directed ectopterygoid, size disparity between premaxillary and lateral teeth, shortened splenial, and widely spaced high-crowned teeth with broad bases and basal infolding; resembles Lanthanotus in having cranial osteoderms and a blunt rostrum, but differs from it and all varanids in the stronger dentary–postdentary overlap and the absence of a contact between the maxillae posterior to the premaxilla; resembles monstersaurs (sensu Norell & Gao 1997, Conrad 2008) in having thickened rounded cranial osteoderms, a low tooth count on the dentary and maxilla, a palatine expansion on the maxilla, a probable contact between the ectopterygoid and palatine anterior to the suborbital fenestra, and a broad rostrum; resembles the fragmentary Late Cretaceous Canadian Labrodictes (Gao & Fox 1996) in having a straight rather than convex ventral jaw margin and inferred absence of a venom groove, but it is larger, and has fewer, more elongated teeth; resembles the Late Cretaceous Mongolian monstersaur Estesia (Norell et al. 1992), and differs from Gobiderma (Gao & Norell 2000), in large size, rostral shape (parallel-sided, relatively elongate, blunt), tooth number (4–5 in dentary and maxilla), a straight rather than strongly convex ventral dentary profile, and general skull proportions, but differs in having cranial osteoderms and in lacking the edentulous posterior portion of the jaw ramus. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Carroll 1988, Hendy et al. 2009 | |||||
Age range: Maastrichtian or 72.10000 to 66.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maastrichtian | China (Jiangxi) | Chianghsia nankangensis (type locality: 114966) |