Yes, I think my zoology lecturer described a coral as a medusa that unaccountably stood on its head and built itself a house... I've added refs for most of the more egregious bits of OR and have tidied up the books. The human section doesn't seem to me to need much doing to it; I think we ought to do something about the fossils, for taxobox, phylogeny and diversity (e.g., we should illustrate tabulate, rugose etc alongside (in a table?) some sort of description of the groups  name, time range from-to, description, ref, image (or something). BTW I shall be offline all next week.