Introduction to the Phoronida - http://www.ucmp.berkeley.edu/brachiopoda/phoronida.html
Introduction to the Phoronida, a small phylum related to brachiopods and bryozoans. |
Phoronida - http://www.tolweb.org/Phoronida/2493
Illustration of the internal anatomy of a horseshoe worm and a list of species. |
Phoronida - http://paleopolis.rediris.es/Phoronida/
Geographical distribution, systematics (including relationship to other lophophorates), list of species, scientific papers, links. Site is in English, Spanish, and French. |
Phoronida World Database - http://www.vliz.be/vmdcdata/phoronida/
Commonly known as horseshoe worms, this phylum is an exclusively marine group of lophophorate animals. Provides a searchable taxon tree. |
Phoronis architecta - http://webs.lander.edu/rsfox/invertebrates/phoronis.html
Information from Invertebrate Anatomy OnLine on this species and its classification, with a detailed account of its external anatomy and its actinotroch larva. |