Skeletal Evolution
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Cnidaria (Garcia)
Hydrozoa
Cubozoa
Anthozoa
Porifera (Frantin)
Demospongiae
Sclerospongiae
Hexactinellida
Mollusca (Coverly)
Gastropoda
Bivalves
Cephalopods
Annelida (Garcia)
Earthworms
Clam Worms
Tubeworms
Nematoda (Frantin)
Secernentea
Adenophorea
Chromadorea
Platyhelminthes (Coverly)
Turbellaria
Cestoda
Monogenea
Arthropoda (Garcia)
Spiders
Crustaceans
Ants
Chordata (Frantin)
Mammalia
Aves
Chondrichthyes
Echinodermata (Coverly)
Holothuroidea
Ophiuroidea
Crinoids
Worksheet
Review Questions!
worksheet
show what you know by answering the following questions above: you may use the answer key below to check your work.