Biology:Minjinia

Short description: Extinct species of fish

Minjinia Temporal range: Pragian PreЄ Є O S D C P T J K Pg N ↓
Scientific classification
Missing taxonomy template (fix):	Incertae sedis/Placodermi
Genus:	†Minjinia Brazeau et al., 2020
Species:	†M. turgenensis
Binomial name
†Minjinia turgenensis Brazeau et al., 2020

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.

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:

	Galeaspida     Osteostraci   Gnathostomata   Antiarchi     Rhenanida       Petalichthyida       Ptyctodontida       Arthrodira       Minjinia       Entelognathus       Ramirosuarezia       Janusiscus     Eugnathostomata   Chondrichthyes     Osteichthyes

References

Wikidata ☰ Q99063023 entry