porifera

genus: leucosolenia class: calcarea Phylum: porifera

hard

bioerosin= chemical and mechanical removal of fragments by etching cells

how do demospongiae bore through shells?

calcareous= 200m hexactinellids= deeper demosponges= all depths

porifera depth distribution

egg, planula, scyphistoma, strobilia, ephyra, adult.

scyphozoa life cycle

class: demospongiae phylum: porifera

soft and can borrow

calcium carbonate

what are calcerea spicules made of?

spongin or silica

what are demospongiae spicules made of?

silica

what are hexactinellida spicules made of?

demospongiae

what class have all freshwater sponges?

grantia spicule

what is A?

spongilla spicule

what is B?

asconiod, one cell think choanoderm is simple and continuous

what sponge structure?

leuconoid sponge, seperate

what sponge structure?

syconiod sponge, folded choanoderm and two layers of mesohyl

what sponge structure?

asconoid, syconoid, and leuconoid

what structures are seen in calcarea?

leuconoid

what structures are seen in demospongia?