Cyclostomata - Conodontophorida
Parent taxon: Conodontophorida according to S. S. Stouge 1984
See also Clark et al. 1981
Sister taxa: Algherella, Alternognathus, Amydrotaxis, Angulodus, Axiothea, Caenodontus, Cambropustula, Chirognathacea, Coelocerodontus, Conodonta, Declinognathodus, Dentacodina, Dichodella, Elsonella, Embaysgnathus, Eocarniodus, Evencodus, Exochognathus, Fryxellodontacea, Fungulodus, Geniculatus, Hibbardellacea, Hindeodelloides, Hindeodina, Homoiranognathus, Huddlella, Istorinus, Laterignathus, Leutorhinion, Mestognathidae, Mitrellotaxis, Neocavitella, Norigondolella, Oligodus, Ozarcodina, Panderodontacea, Paraprionodus, Pavlovites, Playfordia, Polygnathellus, Prattognathus, Pravognathus, Proconodontacea, Pseudosweetognathus, Ptilognathus, Rhodalepus, Roundya, Schopfodus, Sibiriodus, Steptotaxis, Subbryantodus, Tuxekania, Volgelgnathus, Windsorgnathus, Zieglericonus
Subtaxa: Distacodidae Distacodontidae Teridontidae Ulrichodinidae
Type: Distacodidae
Ecology: nektobenthic carnivore
Distribution:
• Carboniferous of United States (2: Colorado, Oklahoma collections)
• Silurian of Morocco (1), United States (3: Missouri), Western Sahara (4)
• Whiterockian of United States (1: Nevada)
• Arenig of China (1)
• Dawan of China (1)
• Ordovician of China (4), the Russian Federation (3), Spain (1), United States (5: Nevada, New York)
Total: 26 collections including 27 occurrences