Ornithomimosaurs from the Nemegt Formation of Mongolia: manus morphological variation and diversity
| Autor: | Yoshitsugu Kobayashi, Philip J. Currie, Rinchen Barsbold, Tomonori Tanaka, Masaya Iijima, Khishigjav Tsogtbaatar, Tsogtbaatar Chinzorig, Ryuji Takasaki |
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| Rok vydání: | 2018 |
| Předmět: |
Ecological niche
010506 paleontology biology Ecology Ornithomimosauria Manus Paleontology Deinocheirus 010502 geochemistry & geophysics Oceanography biology.organism_classification 01 natural sciences Cretaceous Gallimimus Taxon Evolutionary biology Ecology Evolution Behavior and Systematics Anserimimus 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Palaeogeography, Palaeoclimatology, Palaeoecology. 494:91-100 |
| ISSN: | 0031-0182 |
| DOI: | 10.1016/j.palaeo.2017.10.031 |
| Popis: | The Upper Cretaceous Nemegt Formation of Mongolia is rich in well-preserved dinosaurs and Ornithomimosauria is one of the most common taxa in the formation. Three ornithomimosaur taxa, Anserimimus planinychus, Deinocheirus mirificus, and Gallimimus bullatus, have been discovered from the formation so far. However, the recently discovered specimens suggest there is even greater morphological variation of ornithomimosaurs in the Nemegt Formation than are presently recognized. This study focuses on the structures of manual elements among Nemegt ornithomimosaurs and reveals their remarkable diversity. The manual structures of seven individuals, including aforementioned three known taxa and four new individuals, are morphologically distinct from each other. Numerical analyses on metacarpals, phalanges, and unguals also support high morphological diversity of the Nemegt ornithomimosaurs. The large diversity of manual morphology may be related to large variety of palaeoecological niches were prevailed in the Nemegt ecosystem. |
| Databáze: | OpenAIRE |
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