The latter was home to nautiloids, corals, bryozoans, and brachiopods — clearly ... do not really have things in common with them when it comes to appearance. For example, this order incorporates the ...

Ophiuroids, the most diverse group of echinoderms, inhabit a vast array of ecological niches and play vital roles in benthic ecosystems as suspension feeders, scavengers and opportunists. Despite the ...