Hemichordata (Hermichordates) is a phylum of animals. There are 139 species of Hermichordates, in 25 genera and 7 families. This phylum has been around since the cambrian series 2 epoch.
Definition: The marine benthic biome (benthic meaning 'bottom') encompasses the seafloor and includes such areas as shores, littoral or intertidal areas, marine coral reefs, and the deep seabed.
Definition: The number of fossil occurrences in the Paleobiology Database (https://paleobiodb.org) that are identified as belonging to a particular taxon or any of its subtaxa.