221 genera are assigned to the class REGULARES
| Order | Genus | FOP | FOS | LOP | LOS |
|---|
| AJACICYATHIDA | Afiacyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Agyrekocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Ajacicyathellus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Ajacicyathus | Cm | Atda-l | Cm | Tojo-l |
| AJACICYATHIDA | Alphacyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Anaptyctocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Angaricyathus | Cm | Tojo-l | Cm | Tojo-l |
| AJACICYATHIDA | Annulocyathella | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Annulocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Annulofungia | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Antoniocoscinus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Aporosocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Aptocyathella | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Aptocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Arturocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Asterocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Asterotumulus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Aulocricus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Baikalocyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Batschykicyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Bipallicyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Borocyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Botocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Bractocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Cadniacyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Carinacyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Carpicyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Chakassicyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Churanocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Clathricyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Clathrithalamus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Compositocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Conannulofungia | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Cordilleracyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Cordobicyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Coscinoptycta | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Crassicoscinus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Cyathocricus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Cyclocyathella | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Dailycyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Deceptioncyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Degeletticyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Denaecyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Densocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Dentatocoscinus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Didymocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Diplocyathellus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Dokidocyathella | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Dokidocyathus | Cm | Tomm-u | Cm | Boto-u |
| AJACICYATHIDA | Dupliporocyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Erbocyathus | Cm | Boto-l | Cm | Tojo-u |
| AJACICYATHIDA | Erismacoscinus | Cm | Tomm-u | Cm | Boto-l |
| AJACICYATHIDA | Erugatocyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Ethmocoscinus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Ethmocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Ethmophyllum | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Fallocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Fansycyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Flexanulus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Formosocyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Frinalicyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Gagarinicyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Geniculicyathus | Cm | Atda-l | Cm | Atda-u |
| AJACICYATHIDA | Geocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Gloriosocyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Gnaltacyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Gordonicyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Gordonifungia | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Gumbycyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Halysicyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Heckericyathus | Cm | Atda-l | Cm | Atda-u |
| AJACICYATHIDA | Hemithalamocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Hupecyathellus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Hyptocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Ichnusocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Iljinicyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Inacyathella | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Incurvocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Inessocyathellus | Cm | Boto-u | Cm | Tojo-l |
| AJACICYATHIDA | Inessocyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Irinaecyathus | Cm | Boto-l | Cm | Tojo-l |
| AJACICYATHIDA | Isiticyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Jakutocarinus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Jangudacyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Japhanicyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Jebileticoscinus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Joanaecyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Kaltatocyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Kasyricyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Kellericyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Kidjasocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Kijacyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Kisasacyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Kiwicyathus | Cm | Tojo-l | Cm | Tojo-l |
| AJACICYATHIDA | Kolbicyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Kordecyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Kotuyicoscinus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Krasnopeevacyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Kymbecyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Ladaecyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Lenocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Leptosocyathellus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Leptosocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Lunulacyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Mackenziecyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Mattajacyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Membranacyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Mennericyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Mikhnocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Mootwingeecyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Morenicyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Mrassocyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Muchattocyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Nalivkinicyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Nochoroicyathus | Cm | Tomm-l | Cm | Boto-u |
| AJACICYATHIDA | Olgaecyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Orbiasterocyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Orbicoscinus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Orbicyathellus | Cm | Atda-l | Cm | Atda-u |
| AJACICYATHIDA | Orbicyathus | Cm | Tomm-u | Cm | Boto-u |
| AJACICYATHIDA | Orienticyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Pachycoscinus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Palmericyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Papillocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Parethmophyllum | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Peregrinicyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Piamaecyathellus | Cm | Boto | Cm | Boto |
| AJACICYATHIDA | Plicocyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Polycoscinus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Porocoscinus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Prethmophyllum | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Procyathellus | Cm | Boto | Cm | Boto |
| AJACICYATHIDA | Ptretiosocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Putapacyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Rasetticyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Rectannulus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Retecoscinus | Cm | Tomm-u | Cm | Boto-l |
| AJACICYATHIDA | Retetumulus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Ringifungia | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Robertocyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Robustocyathellus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Robustocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Rossocyathella | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Rotundocyathus | Cm | Tomm-u | Cm | Boto-u |
| AJACICYATHIDA | Rozanovicoscinus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Rozanovicyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Rudanulus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Russocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Sajanocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Salairocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Sanarkocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Sanarkophyllum | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Schumnyicyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Sclerocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Sekwicyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Sibirecyathus | Cm | Tomm-u | Cm | Boto-u |
| AJACICYATHIDA | Sigmocoscinus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Sigmocyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Squamosocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Stapicyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Statanulocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Stephanicyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Stillicidocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Subtilocyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Svetlanocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Sylviacoscinus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Syringocyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Tabulacyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Taylorcyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Tegerocyathus | Cm | Boto-l | Cm | Tojo-u |
| AJACICYATHIDA | Tennericyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Tercyathellus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Tercyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Thalamocyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Tologoicyathus | Cm | Atda-l | Cm | Boto-l |
| AJACICYATHIDA | Torosocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Trininaecyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Tubicoscinus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Tumulifungia | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Tumulocoscinus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Tumulocyathus | Cm | Tomm-u | Cm | Boto-u |
| AJACICYATHIDA | Urcyathella | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Urcyathus | Cm | Atda-l | Cm | Boto-u |
| AJACICYATHIDA | Ussuricyathus | Cm | Atda-u | Cm | Boto-u |
| AJACICYATHIDA | Veronicacyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Vologdinocyathellus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Vologdinocyathus | Cm | Boto-u | Cm | Tojo-u |
| AJACICYATHIDA | Wrighticyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Xestecyathus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Yudjaicyathus | Cm | Atda-u | Cm | Atda-u |
| AJACICYATHIDA | Yukonocyathus | Cm | Atda-u | Cm | Boto-l |
| AJACICYATHIDA | Zhuravlevaecyathus | Cm | Boto-l | Cm | Boto-l |
| AJACICYATHIDA | Zonacoscinus | Cm | Boto-l | Cm | Boto-u |
| AJACICYATHIDA | Zonacyathus | Cm | Atda-u | Cm | Boto-u |
| CAPSULOCYATHIDA | Acanthopyrgus | Cm | Boto-l | Cm | Boto-u |
| CAPSULOCYATHIDA | Alataucyathus | Cm | Atda-l | Cm | Boto-l |
| CAPSULOCYATHIDA | Calyptocoscinus | Cm | Boto-l | Cm | Boto-l |
| CAPSULOCYATHIDA | Capsulocyathus | Cm | Atda-l | Cm | Boto-u |
| CAPSULOCYATHIDA | Clathricoscinus | Cm | Boto-l | Cm | Boto-u |
| CAPSULOCYATHIDA | Coscinocyathella | Cm | Atda-u | Cm | Boto-l |
| CAPSULOCYATHIDA | Coscinocyathellus | Cm | Boto-l | Cm | Boto-u |
| CAPSULOCYATHIDA | Coscinocyathus | Cm | Atda-l | Cm | Boto-l |
| CAPSULOCYATHIDA | Còyptoporocyathus | Cm | Tomm-l | Cm | Tomm-u |
| CAPSULOCYATHIDA | Fransuasaecyathus | Cm | Atda-l | Cm | Boto-l |
| CAPSULOCYATHIDA | Korshunovicyathus | Cm | Tomm-u | Cm | Atda-l |
| CAPSULOCYATHIDA | Lanicyathus | Cm | Boto-l | Cm | Boto-l |
| CAPSULOCYATHIDA | Mawsonicoscinus | Cm | Boto-l | Cm | Boto-u |
| CAPSULOCYATHIDA | Rhabdolynthus | Cm | Boto-l | Cm | Boto-u |
| CAPSULOCYATHIDA | Tubericyathus | Cm | Boto-l | Cm | Boto-l |
| CAPSULOCYATHIDA | Tylocyathus | Cm | Boto-l | Cm | Boto-u |
| MONOCYATHIDA | Archaeolynthus | Cm | Tomm-l | Cm | Boto-u |
| MONOCYATHIDA | Butakovicyathus | Cm | Atda-u | Cm | Boto-l |
| MONOCYATHIDA | Favilynthus | Cm | Atda-u | Cm | Boto-l |
| MONOCYATHIDA | Kyarocyathus | Cm | Boto-l | Cm | Boto-u |
| MONOCYATHIDA | Melkanicyathus | Cm | Atda-u | Cm | Boto-u |
| MONOCYATHIDA | Palaeoconularia | Cm | Boto-l | Cm | Boto-u |
| MONOCYATHIDA | Propriolynthus | Cm | Atda-u | Cm | Boto-l |
| MONOCYATHIDA | Robertiolynthus | Cm | Boto-l | Cm | Boto-l |
| MONOCYATHIDA | Sajanolynthus | Cm | Boto-l | Cm | Boto-u |
| MONOCYATHIDA | Tumuliolynthus | Cm | Tomm-u | Cm | Boto-u |
| TABULACYATHIDA | Hupecyathus | Cm | Atda | Cm | Atda |
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FOP = Period of first occurrence
FOS = Stage of first occurrence
LOP = Period of last occurrence
LOS = Stage of last occurrence
Stage abbreviations follow Sepkoski (2002).