Trepostomatida is an order of moss animals. There are 2810 species of Trepostomatida, in 198 genera and 34 families. It includes groups like Leioclemidae. Dead Trepostomatida formshallow marine sediments.
Definition: Colonial organisms are clonal colonies composed of many physically connected, interdependent individuals. The subunits of colonial organisms can be unicellular, as in the alga Volvox (a coenobium), or multicellular, as in the phylum Bryozoa. The former type may have been the first step toward multicellular organisms
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.)