Please correct logic errors in the given paragraph:
Eulithidium diantha is a species of small sea snail with calcareous opercula the pheasant snails. Calcareous opercula is a marine gastropod mollusk in the family Phasianellidae.
Eulithidium diantha is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Phasianellidae, the pheasant snails.