Article: Review of the distribution of the commoner animals in Lower Silurian marine benthic communities

The distribution of the commoner species, most of which are brachiopods, in thirty large collections from the late Llandovery of the Welsh Borderland gives extra data on the previously published Lingula, Eocoelia, Pentamerus, Stricklandia, and Clorinda communities. The constituents of the communities were not usually interdependent, but lived together in comparable habitats with similar external parameters. The depths at which the communities lived are reviewed and it is concluded that the total depth range of the community spectrum was probably less than 200 m.