Heliophyllum is an extinctgenus of corals that existed predominantly in the Devonian. Heliophyllum is of the order Rugosa and can be referred to as horn corals.^[1][2] They were mostly solitary animals, although some were colonial.^[1] The genus had a wide distribution. Fossils of H. halli have been found in the fossil rich Floresta Formation of the Altiplano Cundiboyacense, Colombia.^[3] This genus used its nematocysts to stun prey.