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11 Animal Phylum and characteristics Bio210B 10/20/
Porifera (sponges) symmetry asymmetrical
of germ layers no true tissues
protostome or deuterostome Segmentation none type of digestive system one opening to gut Reproduction asexual, but mainly sexual feeding sessile filter-feeders Cnidaria symmetry radial
of germ layers 2- no mesoderm
protostome or deuterostome neither Segmentation none type of digestive system gastrovascular cavity additional characteristics stinging cells nematocysts with cnidocytes, 2 body types: medusa (floating, sexual stage) and polyp (stationary, asexual form) Spicules made of CaCO3, silica, or spongin (collagen) reproduction polyps form adult medusa which release sperm and egg Feeding polyps grab food from surrounding 3 subclasses: Hydrozoa, Scyphozoa, Anthozoa
Ctenophora symmetry radial and bilateral
of germ layers 2- no mesoderm
protostome or deuterostome neither Segmentation none type of digestive system gastrovascular cavity Additional characteristics not “true” jellies because they have no stinging cells, Subclass of Cnidaria Dominant form reproduction Special characteristics Example Hydrozoa polyp asexual Polyps form colonies via asexual budding Hydra, Velella velella Scyphozoa medusa sexual Have gonads Jellyfish Anthozoa polyp asexual Cilia hairs beating-rainbow color Sea anemone, coral reefs
of germ layers 3
protostome or deuterostome Segmentation yes, series of fused rings Body Cavity coelomates type of digestive system complete Circulatory system closed additional characteristics parapodia, setae on earthworm segments help with movement Reproduction earthworms are hermaphrodites but cannot self-fertilize. feeding leeches are parasites that suck blood and secrete hiridin which prevents blood coagulation, allowing them to continue to suck more blood. Subclasses (3): marine worms, leeches, earthworms Mollusca symmetry bilateral
of germ layers 3
protostome or deuterostomeSegmentation none type of digestive system complete Body cavity coelomate Circulatory system open - hemolymph fluid additional characteristics CaCO3 shell, muscular foot Visceral mass, mantle, radula Reproduction sexual feeding gastropods are herbivores while cephalopods are carnivorous Subclasses(4) Polyplacophora, gastropoda, cephalopoda, bivalvia Arthropoda symmetry bilateral
of germ layers 3
protostome or deuterostome Segmentation yes 3 parts: head, thorax, abdomen type of digestive system complete additional characteristics molting exoskeleton to grow, Jointed appendages Subclasses (4): Chelicerata (fangs) Myriapoda (millipedes, centipedes), Hexapoda (butterflies), Crustacea (decapods)
Echinodermata Symmetry radial symmetry as an adult, bilateral larva
of germ layers 3
protostome or deuterostome Segmentation no type of digestive system additional characteristics tube foot made of ampulla and podium, CaCO3 endoskeleton Reproduction asexual regeneration of limbs otherwise sexual reproduction is common feeding water vascular system with madreporite sucks in water Subclasses (4): Asteridea, Ophiuroidea, Echinoidea, Holothuroides Chordata symmetry bilateral
of germ layers 3
protostome or deuterostome Segmentation yes type of digestive system complete Body cavity coelomate additional characteristics reproduction feeding Characters Agnatha Chondrichthyes osteichthyes Amphibia Reptilia Aves Mammalia Vertebrates 1 1 1 1 1 1 1 Jaws 0 1 1 1 1 1 1 Bony skeleton 0 0 1 1 1 1 1 Four limbs 0 0 0 1 1 1 1 Amniotic egg 0 0 0 0 1 1 1 Milk 0 0 0 0 0 0 1 1= character present 0= character absent
