A little over 50 years ago, Sydney Brenner had the foresight to develop the nematode (round
worm) Caenorhabditis elegans as a genetic model for understanding questions of …

Many years of extensive studies of metazoan mitochondrial genomes have established
differences in gene arrangements and genetic codes as valuable phylogenetic markers …

We report here genome sequences and comparative analyses of three closely related
parasitoid wasps: Nasonia vitripennis, N. giraulti, and N. longicornis. Parasitoids are …

In bilaterian animals, such as humans, flies and worms, hundreds of microRNAs (miRNAs),
some conserved throughout bilaterian evolution, collectively regulate a substantial fraction …

Myriapods (eg, centipedes and millipedes) display a simple homonomous body plan relative
to other arthropods. All members of the class are terrestrial, but they attained terrestriality …

Arthropods were the first animals to conquer land and air. They encompass more than three
quarters of all described living species. This extraordinary evolutionary success is based on …

Metazoa comprises 35–40 phyla that include some 1.3 million described species.
Phylogenetic analyses of metazoan interrelationships have progressed in the past two …

Whole-body regeneration is widespread in the Metazoa, yet little is known about how
underlying molecular mechanisms compare across phyla. Acoels are an enigmatic phylum …

The discovery of four new Xenoturbella species from deep waters of the eastern Pacific
Ocean is reported here. The genus and two nominal species were described from the west …

The past two decades have witnessed profound changes in our understanding of the
evolution of arthropods. Many of these insights derive from the adoption of molecular …