Ardoreosomus (meaning: "tropical body") is an extinct genus of marine ray-finned fish.

It was described from the Induan aged Candelaria Formation[1] of Nevada, United States, which was located near the equator during the Early Triassic epoch.

Ardoreosomus is a ptycholepiform, closely resembling Boreosomus and Ptycholepis; however, Ardoreosomus is distinguished from other ptycholepiforms in having a more strongly angled hyomandibula and lacking an opercular process, among other features.

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