Semionotiformes

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What Wikipedia says

Semionotiformes is an order of ray-finned fish known from the Middle Triassic (Anisian) to the Late Cretaceous (Maastrichtian). It is the sister group to Lepisosteiformes, the order containing fish such as Lepidotes and Gars.

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

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