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4 types of animal phylogeny
sponges, placozoans, ctenophores, cnidarians
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what is the common name for ctenophores?
comb jellies
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what 3 characteristics do ctenophores and cnidarians have in common?
radial symmetry, diploblastic, reproduce sexually
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what 2 characteristics are unique to ctenophores/
bioluminescent, 8 rows of comb-like plates compsed of fused cilia.
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what is the largest animal to use cilia?
ctenophores (comb jellies)
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what are the 8 rows of comb-like plates in ctenophores called?
ctenes
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what are the 2 basic body plans of cnidarians?
polyp (sessile) and medusa (motile)
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what is an example of a cnidarian?
jellyfish
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what type of larva do cnidarians have?
planula larva
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are cnidarians carnivorous?
yes
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do cnidarians have a nerve net?
yes
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what is the digestive cavity with one opening?
gastrovascular cavity
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what are the unique stinging cells that are confined to the tentacles in cnidarians?
cnidocytes
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what are the 3 classes of cnidarians?
hydrozoa, scyphozoa, anthozoa
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what are some characteristics of hydrozoa (hydrozoans)?
- -marine or freshwater
- -some exist as polyps only
- -others medusa only
- -most are colonial
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what are some examples of medusa only hydrozoans?
red eye bell jelly, blood-red jelly, hydra polyp
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how are multiple polyps connected?
they are interconnected and share a gastrovascular cavity
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what are some examples of colonial hydrozoa?
obelia, gonangium, obelia medusa
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what type of hydrozoa produces egg and sperm?
obelia medusa
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what are the polyps of the Portuguese man of war?
gas-filled float, dactylozooids, gastrozooids, gonozooids
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what does the dactylozooid do?
prey capture and defense
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what does the gastrozooid do?
feeds
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what does the gonozooid do?
reproduce
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what is another name for scyphozoa?
true jellyfish
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what dominates the life cycle of scyphozoa?
medusa
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where do scyphozoa live?
all marine
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what is the commonly shaped jellyfish?
Aurelia
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what is another name for Anthozoa?
sea anemones and corals
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what dominates the life cycle of anthozoa?
polyp (sea anemones)
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what type of fish do anthozoans associate with?
clownfish (brightly colored)
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what threatens corals?
global warming
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