craspedida craspedida craspedida is an order of choanoflagellate, with members with an exclusively organic covering. craspedida phase contrast image of monosiga brevicollis scientific classification class: choanoflagellatea order: craspedidacavalier-smith, 1997, emend. nitsche et al. 2011 families codonosigidae salpingoecidae craspedid genera 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.