Palaeonisciformes

Palaeonisciformes

Taxobox
name = Palaeonisciformes
fossil_range=Late Silurian - Early Cretaceous


image_width = 240px
image_caption =
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Palaeonisciformes
subdivision_ranks = Families
subdivision =

Palaeonisciformes is an extinct order of primitive ray-finned fishes. They possesed additional supraorbitals and had a keystone-shaped dermosphenotic.

"Andreolepis hedei" has proven so far to be the earliest-known Actinopterygiian, living around 420 million years ago (Late Silurian in Russia, Sweden, Estonia, and Latvia.

The group diversified during the Carboniferous.

The Palaeonisciformes survived into the Mesozoic, and became extinct during the early Cretaceous.

References

* [http://www.kirj.ee/public/va_ge/g50-3-3.pdf "Andreolepis" (Actinopterygii) in the Upper Silurian of Northern Eurasia]
* [http://palaeo.gly.bris.ac.uk/Palaeofiles/Fossilgroups/Actinopterygii/Basal%20acts/Palaeonisciformes Palaeonisciformes] at University of Bristol


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