Gildner 2000.
(Family) †Asaphidae Burmeister, 1843(Family) †Calymenidae Burmeister, 1843(Family) †Trinucleidae Hawle & Corda, 1847(Genus) Lingula Bruguière, 1797(Family) †Cheiruridae Hawle & Corda, 1847(Family) †Olenidae Burmeister, 1843