Jordi Paps receives funding from the University of Essex, the Royal Society, and the Wellcome Trust. Whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a ...

An international team of scientists including Albert Poustka from the Max Planck Institute for Molecular Genetics in Berlin has discovered that Xenoturbellida and the acoelomorph worms, both simple ...

At present there are many animal phyla that contain only a few species. The existence of these small phyla can be used to test assumptions about speciation and extinction in multicellular animals. We ...

This is a simplified evolutionary tree of six representative animal phyla, illustrating differences in body form, habitat, and species numbers among them. This visual may only be used in conjunction ...

Nearly 30 years ago, a research vessel off the southeast coast of Australia dragged up samples of the sea floor from depths of 400m and 1000m. Hidden away within the samples were a few unexpected gems ...

Annual Review of Ecology and Systematics, Vol. 25 (1994), pp. 351-375 (25 pages) Most animal phyla appeared in the Cambrian radiation, and many have a rich fossil record. The phylogenetic ...