Complex sentence: It is produced following either the embryonic or trochophore larval stage of development and for bivalves is sometimes referred to as a D-stage (early in its development) or pediveliger (late in its development) larva.
Split into simpler sentences: It is produced following either the embryonic or trochophore larval stage of development. In bivalves is sometimes referred to as a D-stage (early in its development) or pediveliger (late in its development) larva.