Today's phylum is the PLACOZOA. There are only two known species of these microscopic blobs and they're only known from aquarium gunge - they've never been found in the wild, and nobody knows what they eat. They have only four kinds of cells (humans have over 200 different kinds). I had never heard of them before this morning.
From the ANNELIDS we have the newly discovered genus Osedax
, worms which live on the bones of dead whales