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Changmiania liaoningensis
Taxonomy
Changmiania liaoningensis was named by Yang et al. (2020). Its type specimen is PMOL AD00114, a skeleton, and it is a 3D body fossil. Its type locality is Lujiatun village, Shangyuan [general] (other), which is in a Barremian/Aptian fluvial-lacustrine horizon in the Yixian Formation of China. It is the type species of Changmiania.
Synonymy list
Year | Name and author |
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2020 | Changmiania liaoningensis Yang et al. p. 5 fig. 1 |
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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.
†Changmiania liaoningensis Yang et al. 2020
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Diagnosis
Reference | Diagnosis | |
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Y. Yang et al. 2020 | (autapomorphies preceded by an asterisk): Fused premaxillae; nasal laterally expanded, overhanging the maxilla; long and straight posterior process of supraorbital,nearly contacting the postorbital; *rostrocaudally elongated frontals: maximum length towidth ratio >4; *no sagittal crest on parietal; infratemporal fenestra triangular in lateral view, wider dorsally than ventrally; jugal process of postorbital rostrocaudally narrow along its whole height; *rostral process of squamosal straight and rostrocaudally elongated; *prominent caudal boss at the dorsolateral corner of the squamosal; *ventral border of dentary convex and ventral border of angular deeply concave, so that the lower jaw looks sigmoidal in lateral view; six cervical vertebrae; *neural spines of the sacral vertebrae completely fused together, forming a craniocaudally-elongated continuous bar; fused scapulocoracoid; *scapular blade asymmetrically expanded both ventrally and dorsally; *paired ilia symmetrically inclined dorsomedially, partially covering the sacrum in dorsal view; dorsal margin of ilium regularly convex along the whole length of the bone; *proximal half of fibula as robust as the corresponding portion of the tibia. |
Measurements
No measurements are available
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Source: subo = suborder, o = order | |||||
References: Marsh 1875, Benton 1983 |
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 |
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Late/Upper Barremian - Early/Lower Aptian | China (Liaoning) | Changmiania liaoningensis (type locality: 73438) |