Petrophyton (alga)
Encyclopedia
Petrophyton is a genus of alga that falls in the coralline
stem group.
Coralline
Coralline means "resembling coral" and may refer to:* Coralline algae, whose fronds are covered with calcareous deposits.* Coralline rock, formed by the death of layers of coralline algae.* Sclerosponges, sometimes called "coralline sponges"....
stem group.