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Rapaxavis pani
Taxonomy
Rapaxavis pani was named by Morschhauser et al. (2009). Its type specimen is DMNH D2522, a skeleton (nearly complete, largely articulated sub-adult individual preserved in a single slab of buff tuffaceous shale), and it is a 3D body fossil. Its type locality is Xiaioyugou, Lianhe, which is in an Aptian lacustrine - large shale in the Jiufotang Formation of China. It is the type species of Rapaxavis.
Synonymy list
| Year | Name and author |
|---|---|
| 2009 | Rapaxavis pani Morschhauser et al. pp. 545-546 figs. 1-2 |
| 2011 | Rapaxavis pani O'Connor et al. p. 464 |
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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.
†Rapaxavis pani Morschhauser et al. 2009
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. M. Morschhauser et al. 2009 | Small euenantiornithean bird, differs from most other Euenantiornithes in long and slightly curved rostrum and mandible. Uniquely defined by caudolateral processes of the sternum with two prominent branches and a smaller third branch, paired triangular thoracic elements, and the combination of six sacral vertebrae and six free caudal vertebrae. R. pani can be distinguished from Longirostravis hani in lacking the moose-antler-shaped caudolateral processes of the sternum, the median trabecula of the sternum lacks any distal flaring and the sacral count of six is lower than the seven seen in L. hani. Rapaxavis shares with L. hani similar rostrum morphology, lateral margin of the coracoid concave, and manus lacking unguals. Rapaxavis differs from Longipteryx chaoyangensis in having more gracile teeth restricted rostral most dentary, relatively longer hallux and hindlimbs longer relative to the front limbs than Longipteryx. Rapaxavis differs from Longipteryx by lacking manual unguals. | |
| J. K. O'Connor et al. 2011 | A small longipterygid enantiornithine bird characterized by the unique combination of the following morphological characters: rostrum approximately 60% skull length; dentition rostrally restricted; premaxillary process of maxilla approximately three times longer than the jugal process; nasals lacking maxillary process, external nares schizorhinal; furcula with short interclavicular symphysis and interclavicular angle of 50; body of coracoid lateral and sternal margins straight; coracoidal facets of sternum defining an obtuse angle of approximately 110; paracoracoidal ossifications present; sternal lateral trabecula distally forked; first phalanx of alular digit and second phalanx of major digit reduced to sharply tapering triangular splints (all manual claws absent); femur 80% the length of the “tibiotarsus”; and penultimate pedal phalanges longer than the preceding phalanges. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Marsh 1875, Kiessling 2004, Benton 1983 | |||||