Cytheroidea is a superfamily of ostracodes. There are 3815 species of Cytheroidea, in 473 genera and 36 families. This superfamily has been around since the silurian period. Individuals can grow to 1 mm.
Definition: Component found in mineralized skeletal tissue, (a specialized form of biogenic tissue in which the extracellular matrix is mineralized, and which functions in mechanical and structural support.)
Definition: Hard framework, internal or external, which supports and protects softer parts of plant, animal or unicellular organism, and to which muscles usually attach in animals, includes skeletons (derived from Lawrence, 2005).