ocr: To Quit click here > Quit DUETEROSTOMES Higher Metazoans Lophophorates Echinoderms Hemichordates Urochordates Cephalochordates Vertebrates - - - - AA - - COMMON ANCESTOR Tol Continue click RETURN of echinoderms through vertebrates New Features Dipleurula-type larvae mouth develops uniquely in embryo mouth unique larval forms gut anus RETURN Auricularia Tornaria
