General reference article on sponges by Henry Genthe

General reference on sponges from the Tree of Life Web Project, University of Arizona

Introduction to sponges, University of California, Berkeley

Latest discoveries and publications on Porifera

Pump-filter modules through space and time by Dr. Ronald Shimek

Sponge regeneration by Susan Scott

Sessile marine invertebrates, Queensland Museum Explorer

Sponges and hermit crabs, Coe College, Cedar Rapids, Iowa

General reference on phylogeny of life, University of California, Berkeley

Phylogeny systematics (reconstructing events that have led to diversity of life), University of California, Berkeley

Invertebrate biology and related links, Professor A. R. Palmer, University of Alberta, Canada

The work of Dr. Matthew P. Scott, Stanford University

The work of Dr. Mitchell L. Sogin, Marine Biological Laboratory, Woods Hole, Massachusetts

The work of Dr. Mark Erdmann, University of California, Berkeley

More work of Dr. Mark Erdmann, University of California, Berkeley

The work of Dr. Rudolf A. Raff, Indiana University

General reference on Cnidaria from the Tree of Life Web Project, University of Arizona

General reference on Cnidaria, University of California, Berkeley

General reference on Cnidaria, University of Michigan

Life in the midwater, Monterey Bay Aquarium Research Institute (MBARI), California

Bioluminescence, University of California, Santa Barbara

Profile of Dr. Ian Lawn, The University of Queensland, Australia

Profile of Dr. Bruce Robison, Monterey Bay Aquarium Research Institute (MBARI), California

Profile of Dr. John H. (Jack) Costello, Providence College, Rhode Island

General reference on flatworms from the Tree of Life Web Project, University of Arizona

General reference on flatworms, University of California, Berkeley

Marine Flatworms of the World

General reference on trace fossils, Emory University

Article on early animal evolution by Andrew H. Knoll and Sean B. Carroll

The work of Dr. James Whitey Hagadorn, California Institute of Technology

The work of Dr. Hugh D. Jones, University of Manchester

The work of Dr. Matthew P. Scott, Stanford University, California

General reference on arthropods from the Tree of Life Web Project, University of Arizona

Early terrestrial life and ecosystems, Yorkshire Geological Society, University of Sheffield

Early terrestrial and fresh water ecosystems and trace fossils, University of Aberdeen, Scotland

General reference on eurypterids (giant sea scorpions)

The work of Professor Robert Full on robotics and the science of motion, University of California, Berkeley

The work of Dr. Simon J. Braddy, University of Bristol

Robotics Webpage, Los Alamos National Laboratory (includes the work of Mark Tilden)

The work of iRobot Corporation and Electro-Mechanical Designer Ed Williams

The work of Dr. William A. Shear, Hampden-Sydney College, Virginia

Milli-PEET, research on Diplopoda (millipedes), from the Field Museum, Chicago

General reference on molluscs from the Tree of Life Web Project, University of Arizona

Selected sources of information on molluscs, Smithsonian Institution

Shell clubs and organizations

The Conchologist's Information Network

Tropical Marine Mollusc Programme

General reference on molluscs

Profile of Dr. Geerat J.Vermeij, University of California, Davis

Profile of Dr. Peter D. Ward, University of Washington

Echinodermata links

General reference on echinoderms from the Tree of Life Web Project, University of Arizona

Deep-sea echinoderms by Paul H. Yancy, Whitman College

Echinoderm newsletter, National Museum of Natural History, Smithsonian Institution

The Echinoid Directory, by Dr. Andrew Smith, Natural History Museum, London

Profile of Dr. Andrew Smith, Natural History Museum, London

Profile of Dr. Gail Kaaialii, Chaminade University, Hawaii

General reference on annelids, University of California, Berkeley

General reference on annelids from the Tree of Life Web Project, University of Arizona

General reference on evolution

Article on the origin of animal body plans (including section on Hox genes) by Douglas Erwin, James Valentine, and David Jablonski

Burgess Shale fossils, University of Calgary, Canada

Cambrian Explosion, University of Bristol, UK

Gene sequences, Penn State University

Continents during the Cambrian period, University of California, Berkeley

Article on early Cambrian continental masses by Joseph L. Kirschvink, Robert L. Ripperdan, and David A. Evans

The work of Terry Chase, scientist and artist

The work of Dr. Damhnait McHugh, Colgate University

The work of Dr. Rudolf A. Raff, Indiana University

The work of Dr. Desmond Collins, University of Toronto, Canada

General reference on chordates, University of California, Berkeley

Chordate diversity links

General reference on chordates from the Tree of Life Web Project, University of Arizona

Overview of chordates through time, California Academy of Sciences, San Francisco

Website of Dr. Jennifer A. Clack, including early tetrapod research, University of Cambridge, England

Early terrestrial tetrapods, from the Tree of Life Web Project, University of Arizona (referencing the work of Dr. Jennifer A. Clack)

The work of Dr. Kristi Curry-Rogers, Science Museum of Minnesota