Craspedida

Craspedida is an order of choanoflagellate, with members with an exclusively organic covering.

Salpingoeca rosetta
S. rosetta has been named for the rosette-shaped colonies formed by its cells. Recent studies show a bacterial sulfonolipid, called rosette inducing factor (RIF-1) produced by Algoriphagus machipongonensis triggers colony formation in S. rosetta.