Heliophyllum

Heliophyllum is an extinct genus of corals that existed predominantly in the Devonian. "Heliophyllum" is of the order Rugosa and can be referred to as horn corals. The genus had a wide distribution. Fossils of "H. halli" have been found in the fossil rich Floresta Formation of the Altiplano Cundiboyacense, Colombia. This genus used its nematocysts to stun prey.