The common clam worm (Nereis virens) belongs to the Phylum Annelida, the segmented worms, which includes earthworms and leeches. Clam worms are in a class of Annelids called the Polychaeta, ...

A team of biologists report in this week's Nature the genome sequences of three organisms that represent more than one-quarter of marine species, including clams, octopuses and the segmented worms ...