-Plants (Kingdom Plantae)

-Red Algae (Phylum Rhodophyta)

-True Red Algae (Subphylum Eurhodophytina)

-Florideophycean Algae (Class Florideophyceae)

-Subclass Corallinophycidae

-Coralline Algae (Order Corallinales)

-Coralline Algae (Family Corallinaceae)

-Crustose Coralline Algae (Genus Lithothamnion)

Lithothamnion is a genus of crustose reef-forming red algae in the family Corallinaceae. It absorbs minerals from seawater.