Families
3
Acastidae
5
Acleistoceratidae
1
Adolfidae
1
Aerostrophidae
1
Aisenvergiidae
2
Ambocoeliidae
1
Ambocoellidae
2
Ambonychiidae
1
Anopliidae
1
Araksalosiidae
2
Ascodictyidae
3
Athyrididae
6
Atrypidae
1
Auloporidae
7
Botryocrinidae
1
Brevicoceratidae
4
Callocystitidae
1
Centronellidae
5
Chonetidae
2
Clorindidae
1
Coccosteidae
1
Cranaenidae
2
Cryptonellidae
3
Cyrtinidae
1
Cyrtinopsidae
1
Discinidae
1
Disciniidae
1
Douvillinidae
1
Echinocarididae
1
Echinospiriferidae
1
Edmondiidae
1
Elythidae
1
Fenestellidae
2
Fistuliporidae
1
Fistulliporidae
4
Grammysiidae
1
Hederellidae
1
Heterotrypidae
1
Homalonotidae
2
Hysterolitidae
1
Janassidae
3
Leiorhynchidae
1
Leptostrophidae
2
Leptostrophiidae
4
Lingulidae
1
Loxonematidae
1
Mactromyidae
6
Malletiidae
4
Melocrinitidae
2
Meristellidae
5
Modiomorphidae
14
Mucrospiriferidae
6
Nucleocrinidae
1
Ormoceratidae
1
Pachyporidae
1
Parazygidae
15
Periechocrinidae
2
Phacopidae
15
Platyceratidae
2
Productellidae
2
Proetidae
3
Ptyctodontidae
1
Rhinoporidae
3
Rhipidomellinae
1
Rhynchospirinidae
1
Ropalonaridae
1
Saphicorhynchidae
2
Schizophoriidae
1
Solemyidae
5
Spinocyrtiidae
4
Strophodontidae
1
Sulcoreteporidae
1
Taxocrinidae
1
Trigonirhynchidae
2
Trigonirhynchiidae
1
Trochonematidae
1
Tropidoleptidae
2
Vinellidae
18
Zaphrentidae