Pinacoderm
Encyclopedia
The pinacoderm is the outer most layer of cells (pinacocytes) in the phylum Porifera (sponge
Sea sponge
Sponges are animals of the phylum Porifera . Their bodies consist of jelly-like mesohyl sandwiched between two thin layers of cells. While all animals have unspecialized cells that can transform into specialized cells, sponges are unique in having some specialized cells, but can also have...

s), equivalent to the epidermis in other organisms.

The pinacocytes are on the external surface of the sponge body and characterized as an epithelial layer of flattened cells.
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