Minjinia
Minjinia turgenensis is a species of placoderm from the Devonian of Mongolia. It is known from a single specimen preserving part of the skull, including remains of endochondral bone, which indicates that a mineralised endoskeleton evolved before the split between bony and cartilaginous fish, and that it was lost in the latter group.[1]
| Minjinia | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Placodermi |
| Order: | †incertae sedis |
| Genus: | †Minjinia Brazeau et al., 2020 |
| Species: | †M. turgenensis |
| Binomial name | |
| †Minjinia turgenensis Brazeau et al., 2020 | |
Classification
In the phylogenetic analysis ran by Brazeau et al., M. turgenensis was found as the sister taxon of a clade formed by Entelognathus, Ramirosuarezia, Janusiscus and the crown gnathostomes. A cladogram simplified from their analysis is shown below:[1]
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References
- Brazeau, Martin D.; Giles, Sam; Dearden, Richard P.; Jerve, Anna; Ariunchimeg, Ya.; Zorig, E.; Sansom, Robert; Guillerme, Thomas; Castiello, Marco (7 September 2020). "Endochondral bone in an Early Devonian 'placoderm' from Mongolia". Nature Ecology & Evolution. doi:10.1038/s41559-020-01290-2. PMID 32895518.
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