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The three types of sponges
asconoid
synconoid
leuconoid
asconoid sponge traits
size of a little finger
smallest and most simple
most primitive
synconoid sponge traits
invaginations increase surface area for choanocytes
slightly larger than an asconoid
only one osculum
leuconoid sponge traits
much larger because of increase in choanocytes
2 oscula
most advanced structural type
very few live in fresh water
an example is the spongilla found on the underside of logs in streams
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