- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
The new genus and species of eurypterid, Brachyopterus stubblefieldi, from lower Caradoc (Ordovician) beds in the Severn river area, Montgomeryshire, central Wales, is described. Classification of eurypterids is also discussed; two new superfamilies, Stylonuracea and Eurypteracea, and two new families, Mycteropteridae and Rhenopteridae, are proposed. Three new names are proposed for preoccupied generic names, as follows: Tarsopterella for Tarsopterus, Onychopterella for Onychopterus, and Tylopterella for Tylopterus.