Heliophyllum (or “Horn Coral”) is an extinct Genus of Coral that existed predominantly in the
Devonian (408-360 million years ago).
This well preserved specimen was found in the beechwood limestone (Clark County, Indiana, USA)
This picture of the Heliophyllum horn coral shows the beaded pattern along its septa lines.Heliophyllum (Rugosa / Horn Coral)
Corals are filter feeders, therefore there existance in a succession indicates that:
– they lived inclear warm seawater
– they are algae symbiont, so are representative of the photic zone