Mirischia
Mirischia | |
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Hypothetical Model | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Clade: | Saurischia |
Clade: | Theropoda |
Family: | †Compsognathidae |
Genus: | †Mirischia Naish et al., 2004 |
Species: | †M. asymmetrica
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Binomial name | |
†Mirischia asymmetrica Naish et al., 2004
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Mirischia is a small (two meter-long)
Discovery and naming
In 2000
The holotype, SMNK 2349 PAL, has its probable provenance in the Romualdo Formation of the Santana Group, dating from the Albian. It consists of a partial articulated skeleton, largely consisting of the pelvis and incomplete hind limbs, including two posterior dorsal vertebrae, a rib, gastralia, partial ilia, pubes and ischia, partial thigh bones and the upper parts of the right tibia and fibula. In front of the pubes, a piece of a petrified intestine is present. The specimen represents a subadult individual.[2]
Description
Mirischia was a small bipedal predator. Its length was in 2004 estimated at 2.1 metres.
Phylogeny
In 2004 Mirischia was assigned to the Compsognathidae, as closely related to Compsognathus from the Upper Jurassic of Europe and Aristosuchus from the Lower Cretaceous of England. It would then be the only compsognathid known from the Americas.[2] In 2010 Naish suggested it may have instead been a basal member of the Tyrannosauroidea.[4] In 2024, Andrea Cau published a study on the phylogenetics of compsognathids that recovered Mirischia, along with four other proposed
This is a simplified version of the phylogeny in Cau (2024), with Mirischia in bold.
Tetanurae |
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References
- ^ D.M. Martill, E. Frey, H.-D. Sues and A.R.I. Cruickshank, 2000, "Skeletal remains of a small theropod dinosaur with associated soft structures from the Lower Cretaceous Santana Formation of northeastern Brazil", Canadian Journal of Earth Sciences 37(6): 891-900
- ^ a b c d e Naish, D., Martill D.M., and Frey, E., 2004, "Ecology, Systematics and Biogeographical Relationships of Dinosaurs, Including a New Theropod, from the Santana Formation (?Albian, Early Cretaceous) of Brazil", Historical Biology. 2004: 1-14 http://dx.doi.org/10.1080/08912960410001674200
- ^ Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press p. 123
- ^ Naish, Darren. 2010. Tetrapod Zoology Book One. CFZ Press
- .