15 terms

Science Olympiad - Fossils - Porifera

Terms related to sponges.
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Animalia
Kingdom
Porifera
Phylum
Hydnoceras
Genus. Of class Hexactinellida. Reef builder from Devonian to Carboniferous.
Late Precambrian
Appearance of Porifera
Hexactinellida
sponges with silicon spicules
Demospongia
sponges with spicules usually made of spongin. Includes freshwater poriferans.
Calcarea
sponges made of calcium carbonate, doesn't necessarily have spicules.
spicule
spiky structure that plays a role in structural support of sponges
ostium
small pore where water enters sponge.
spongocoel
inner chamber where food is filtered from water.
osculum
large pore where filtered water exits.
choanocytes
flagellated cells in spongocoel that filter food from water.
pinacocytes
epithelial cells that line outside of sponge.
mesohyl
connective layer that acts as a shared, secreted skeleton
Astraeospongium
Genus. Of class Calcarea. Lived from Silurian to Devonian.