Evolution of the Reproductive System
By: Chris Delmond, Bo Kendrick-Holmes, and Patrick O'Neill
Home
Mollusca- O'Neill
Snails
Clams
Squids
Porifera- O'Neill
Sponges
Sycons
Leuconoids
Cnidaria- O'Neill
Jellyfish
Hydras
Sea Anemones
Platyhelminthes- Kendrick-Holmes
Planaria
Tapeworms
Trematodes
Nematoda- Kendrick-Holmes
Ascaris
Eelworm
Pinworm
Annelida- Kendrick-Holmes
Earthworms
Leeches
Clam Worms
Arthropoda-Delmond
Blue Crabs
Scorpions
Spiders
Echinodermata-Delmond
Sea Cucumbers
Sea Urchins
Starfish
Chortada-Delmond
Birds
Fish
Frogs
Worksheet
Annelida
The annelids (also called "ringed worms") are a large phylum of segmented worms, with over 22,000 modern species.