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Animal Diversity

TermDefinitionExamples
Porifera Multicellularity Sponges
Cnidaria True tissue (2 layers); radial symmetry Jellyfish, anemones, corals
Platyhelminthes Bilateral symmetry; 3 tissue layers (endo-, meso-, ectoderm) Flatworms, tapeworms, flukes
Rotifera Psuedocoelomates (false body cavity) Rotifers
Mollusca True coelom (true body cavity)-- contained within mesoderm Gastropods (snails), cephalopods, bivalves, chitons
Annelida Segmentation Earthworms, marine worms, leeches
Nematoda Molting Roundworms
Anthropoda Jointed appendages Insects, crustaceans, arachnids, millipedes, centipedes
Echinodermata Deuterostome development Sea stars, sea urchins, sea cucumbers, feather stars
Chordata Notochord, dorsal hollow nerve chord, postanal tail, pharyngeal slits Chordates, fish, amphibians, reptiles, mammals
Subphylum Urochordata 4 features of chordates Tunicates
Subphylum Cephalorchordata 4 features of chordates Lancelets
Class Myxini Cranium Hagfish
Petromyzontida Vertebral column Lamprey
Chondrichthyes Jaws Sharks, rays
Osteichthyes Calcified bones Bass, goldfish, most fish
Amphibia Tetrapods Frogs, salamanders
Reptilia Amniotic egg Turtles, lizards, snakes, crocs, birds
Mammalia Mammary glands Monotremes, marsupials, placental
Protosomes Platyhelminthes, rotifera, mollusca, annelida, nematoda, arthropoda
Lophotrochophores Platyhelminthes, rotifera, mollusca, annelida
Ecdysiasts Nematoda, arthropoda
Gnathostomes Jaws
Protostome Mouth first; blastopore develops into mouth, with second opening becoming anus
Deuterostome Mouth second; blastopore develops into anus, with second opening becoming mouth
Coelom Lined body cavity; lies between visceral organs and body wall
Acoelomate Animal without a body cavity
Pseudocoelomate Animal with a body cavity located between the mesoderm and endoderm
Eucoelomate True coelomates; animal with a body cavity completely lined with mesodermal tissue
Created by: mgs2498
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