Translations:AY Honors/Fossils/Answer Key 2/53/en
From Pathfinder Wiki
Brachiopods are two-shelled marine animals with an external morphology superficially resembling pelecypods (for instance, clams) of phylum Mollusca to which they are not closely related. It is estimated by paleobiologists that 99 percent of all documented lamp-shell species are both fossils and extinct.
