1P: Exoskeleton
Phylum Arthropoda
2C: 3 pairs of legs, 1 pair of antenna
Class Insecta
3C: 4 pairs of legs, no antenna
Class Arachnida
4C: Fins present
Class Actinopteri
5C: Slimy skin
Class Amphibia
6C: Dry, scaly skin
Class Reptilia
8C: One large shell, muscular foot
Class Gastropoda
9P: Hard body, spines
Phylum Echinodermata
10C: Shell has two halves connected at a point
Class Bivalvia
11C: Tentacles with suckers
Class Cephalopoda
12P: Roundworm, SEGMENTED
Phylum Annelida
13P: Roundworm, NONsegmented
Phylum Nematoda
14P: Flatworm
Phylum Platyhelminthes
15P: Soft body, stinging tentacles
Phylum Cnidaria
16P: No skeleton, soft body; presence of a hard shell OR arms
Phylum Mollusca
17C: Feathers, wings
Class Aves
18P: Endoskeleton
Phylum Chordata
19C: 5+ pairs of legs
Class Crustacea