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Gansus yumenensis
Taxonomy
Gansus yumenensis was named by Hou and Liu (1984). Its type specimen is IVPP V 6862, a set of limb elements (partial left pelvic limb), and it is a compression fossil. Its type locality is Changma, Yumen, which is in an Aptian lacustrine mudstone/shale in the Xiagou Formation of China. It is the type species of Gansus.
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Gansus yumenensis Hou and Liu p. 1296 figs. 1-3, Pl. 1 |
| 1997 | Gansus yumenensis Hou p. 103 |
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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.
†Gansus yumenensis Hou and Liu 1984
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. H. Hou 1997 | A small form with recurved talons maintaining well developed flexor tuberosities: digits that are slender, elongated, and composed of phalanges with inflated termini; depressions are present to facilitate the tendons of the Flexor longus digitorum; and digit IV is the longest in the series. The tarsometatarsus is slightly shorter than the longest digit, is slightly laterally compressed incompletely fused distally, and a distal haemal foramen is well developed and placed nearly at the terminal end within the intertrochlear recess. Mt IV is shorter than MtIII. Proximally the sulcus for the extensor musculature is shallow and small, posterior to which there are no well developed calcaneal ridges or tendinal canals, but on the proximal surface there is a pronounced crest separating the anteroposteriorly elongated cotyles. On the distal tibiotarsus a supratendinal bridge is absent, the medial condyle is particularly narrow with an acute lateral margin, the lateral condyle is particularly broadened, and the medial side of the posterior intercondylar groove is more excavated. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Marsh 1875, Benton 1983 | |||||