Phylum Mollusca
" Class Gastropoda - snails, slugs
" Class Cephalopoda - squids, octopus
" Class Bivalvia - Clams, oysters
Phylum Annelida -- segmented worms
" Polychaetes - marine predators with parapodia
" Oligochaetes - terrestrial worms and leeches

Phylum Arthropoda - segmented bodies, exoskeleton, jointed appendages, largest phyla
" Subphylum Crustacea - crabs, lobsters
" Subphylum Uniramia - insects (Class Insecta), millipedes, centipedes
" Subphylum Chelicerata - spiders, scorpions

Phylum Echinodermata (starfish)

** Echinoderms have radial symmetry and a unique water vascular system for locomotion
Phylum Chordata - has notochord (dorsal nerve cord)

*Lanceletes & Seas Squirts are nonvertebrate chordates

Subphylum Vertebrata

In vertebrates, the notochord is replaced by the vertebral column. Most vertebrates also have a head region, endoskeleton, and paired appendages.
1. Jawless Fishes (lamprey & hagfish)
2. Cartilage Fishes (sharks & rays)
3. Bony Fishes (salmon, goldfish, carp)
4. Amphibians
5. Reptiles
6. Birds
7. Mammals

Vertebrates

In vertebrates, the notochord is replaced by the vertebral column. Most vertebrates also have a head region, endoskeleton, and paired appendages.

1. Jawless Fishes (lamprey & hagfish)
2. Cartilage Fishes (sharks & rays)
3. Bony Fishes (salmon, goldfish, carp)
4. Amphibians
5. Reptiles
6. Birds
7. Mammals