Donovan, S. K.
Author Affiliation, Ana.
Geography and Geology; Faculty of Pure and Applied Sciences
A Rhuddanian (Silurian, Lower Llandovery) pelmatozoan fauna from south-west Wales
Date of Publication
Only two crinoid faunas of Rhuddanian or early Aeronian age have been described before, both from North America. A description of the lower Llandovery crinoids and a rhombiferan from the Haverfordwest area is presented. At the familial level this fauna shows strong similarities with coeval, but more diverse, crinoid assemblages from North America, suggesting that endemism did not develop until later in the Silurian.....