Article: Early species of the bryozoan genus Phaenopora from the Caradoc Series, Shropshire

The Caradocian cryptostome Phaenopora stubblefieldi sp. nov. from the Hoar Edge Group, Shropshire, is one of the oldest known species of Phaenopora. Its morphologic features suggest a relation within the phylogenetic sequence of the escharoporid group that has its oldest known representative in the Chazy Series, North America. This group also includes the later Ordovician and Silurian genera: Escharopora, Graptodictya, Ptilodictya, Stictoporella, Phaenopora, and Clathropora.