Phylum Chordata -
the "phylum"
(scientific grouping) of vertebrate animals that includes some
of the animal classes we are most familiar with (mammals, birds,
fish, reptiles and amphibians)
Phylum Arthropoda(Arthropods) - the "phylum"
(scientific grouping) of invertebrate animals and the largest
phylum of animals -- including about 85% of the animals on earth.