Trinucleoidea is a superfamily of trilobites. There are 134 species of Trinucleoidea, in 51 genera and 5 families. It includes groups like Liostracinidae, Dionididae, and Trinucleidae.
Definition: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
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.)
