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Xiaosaurus dashanpensis
Taxonomy
Xiaosaurus dashanpensis was named by Dong and Tang (1983). Its type specimen is IVPP V6730A (field no. Cr. 003), a partial skeleton (A damaged maxilla, a complete tooth, 2 cervicals, 4 caudals, left humerus, and complete right hindlimb.), and it is a 3D body fossil. Its type locality is Dashanpu Dinosaur Quarry [lower], which is in a Bajocian/Oxfordian lacustrine sandstone/mudstone in the Shaximiao Formation of China.
It was considered a nomen dubium by Sereno (1991); it was considered a nomen dubium by Norman et al. (2004).
It was considered a nomen dubium by Sereno (1991); it was considered a nomen dubium by Norman et al. (2004).
Synonymy list
| Year | Name and author |
|---|---|
| 1983 | Xiaosaurus dashanpensis Dong and Tang |
| 1992 | Xiaosaurus dashanpensis Dong p. 61 |
| 1997 | Xiaosaurus dashanpensis Dong p. 793 |
| 1999 | Xiaosaurus dashanpensis Knoll p. 65 |
| 2005 | Xiaosaurus dashanpensis Barrett et al. p. 831 |
| 2005 | Xiaosaurus dashanpensis Peng et al. |
| 2008 | Xiaosaurus dashanpensis Butler et al. p. 12 |
| 2010 | Xiaosaurus dashanpensis Carpenter p. 156 |
| 2011 | Xiaosaurus dashanpuensis Li et al. p. 23 |
| 2012 | Xiaosaurus dashanpensis Zheng et al. p. 208 |
| 2023 | Xiaosaurus dashanpensis Manitkoon et al. p. 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.
†Xiaosaurus dashanpensis Dong and Tang 1983
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. M. Barrett et al. 2005 | A small ornithischian dinosaur that possesses a single autapomorphy: possession of a proximally straight humerus that lacks the medial curvature seen in all other basal ornithischians. | |
| G. Peng et al. 2005 | Small cursorial ornithopod recognized by laterally compressed teeth with Buddha’s-hand-like outline and symmetrical medial and lateral surfaces; tooth crown lacking wear surface and vertical ridge; serrated anterior and posterior margins of teeth; undeveloped cingula of teeth; straight and slender humerus with undeveloped deltopectoral crest; lesser trochanter of femur lower than femoral head and greater trochanter; lower positioned fourth trochanter forming a fan-like crest that attains an index of 0.53; short tibia about 1.1 times of femur length; Metatarsal III about 64% of femur length; slender and straight pedal phalanges. | |
| R. J. Butler et al. 2008 | A proximally straight humerus that lacks the medial curvature seen in all other basal ornithischians.
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