An extinct ribbonlike sea creature about the size of a human thumb ... a feature associated with the animal group known as chordates, in the phylum Chordata. All chordates, such as vertebrates ...

One of the strangest groups of creatures of all is the sea ... belong in the same phylum as we do - the chordata. Take, for example, the baked bean sea squirt. Looking like, well, a baked bean ...

Butterflies and shrimps and other animals with jointed legs belong ... Here's a tunicate, also called a sea squirt, which is in Chordata, and a crab, in Arthropoda." It takes some searching ...

Among them were the chordates, to which vertebrates (animals with backbones ... with a warming climate and rising sea levels flooding low-lying landmasses to create shallow, marine habitats ...