Pycnodontiformes

Rarity: Common

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What Wikipedia says

Pycnodontiformes (sometimes included inside a larger superorder, Pycnodontomorpha) is an extinct order of primarily marine bony fish. The group first appeared during the Late Triassic and disappeared during the Eocene. The group has been found in rock formations in Africa, Asia, Europe, North and South America.

Excerpt from the Wikipedia article “Pycnodontiformes”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: User:Haplochromis, CC BY-SA 3.0, via Wikimedia Commons.