Porolepiformes

Rarity: Common

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At a glance

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What Wikipedia says

Porolepiformes is an order of prehistoric lobe-finned fish which lived during the Devonian period (about 416 to 359 million years ago). They are thought to represent the sister group to lungfish (class Dipnoi). The group contains two families: Holoptychiidae and Porolepididae.

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

Image: DiBgd, CC BY-SA 4.0, via Wikimedia Commons.