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Ajacicyathida ✝

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Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	Not linked to a GBIF record.
PaleoBioDB ID (PBDB)	4218	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=4218

Rank

order (PBDB)

Taxonomy (PBDB)

Life : Animalia : Porifera : Regulares : Ajacicyathida

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
phylum	Porifera	Grant 1836
class	Archaeocyatha
class	Regulares	Vologdin 1937
order	Ajacicyathida	Bedford and Bedford 1939

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Ajacicyathida	order	belongs to Regulares	second hand	Sepkoski, 2002

Status (PBDB)

extinct

Taxon Size (PBDB)

320

First Recorded Appearance

541 - 520 Ma
Cambrian

Last Recorded Appearance

516 - 513 Ma
Cambrian

Environment

marine (based on Regulares)

Motility

stationary, attached (based on Regulares)

Vision

blind (based on Regulares)

Diet

suspension feeder (based on Regulares)

Taphonomy

high Mg calcite (based on Regulares)

Primary Reference (PBDB)

J. J. Sepkoski, Jr. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Erbocyathidae ✝ family	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Afiacyathus ✝ genus	listed (PBDB)	30	520 Ma Cambrian	516 Ma Cambrian
Agyrekocyathus ✝ genus	listed (PBDB)
Ajacicyathellus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	516 Ma Cambrian
Ajacicyathus ✝ genus	listed (PBDB)	97	530 Ma Cambrian	516 Ma Cambrian
Aldanocyathus ✝ genus	listed (PBDB)	106	530 Ma Cambrian	516 Ma Cambrian
Alexandricyathus ✝ genus	listed (PBDB)	5	516 Ma Cambrian	516 Ma Cambrian
Alphacyathus ✝ genus	listed (PBDB)
Anaptyctocyathus ✝ genus	listed (PBDB)	5	541 Ma Cambrian	516 Ma Cambrian
Angaricyathus ✝ genus	listed (PBDB)
Annulocyathella ✝ genus	listed (PBDB)	6	520 Ma Cambrian	516 Ma Cambrian
Annulocyathus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	516 Ma Cambrian
Annulofungia ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Antoniocoscinus ✝ genus	listed (PBDB)	6	520 Ma Cambrian	516 Ma Cambrian
Aporosocyathus ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Aptocyathella ✝ genus	listed (PBDB)	5	516 Ma Cambrian	516 Ma Cambrian
Aptocyathus ✝ genus	listed (PBDB)	18	516 Ma Cambrian	516 Ma Cambrian
Archaeocyathellus ✝ genus	listed (PBDB)	18	520 Ma Cambrian	516 Ma Cambrian
Archaeofungia ✝ genus	listed (PBDB)	19	520 Ma Cambrian	516 Ma Cambrian
Aroonacyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Arturocyathus ✝ genus	listed (PBDB)	10	530 Ma Cambrian	520 Ma Cambrian
Asterocyathus ✝ genus	listed (PBDB)	8	520 Ma Cambrian	516 Ma Cambrian
Asterotumulus ✝ genus	listed (PBDB)
Aulocricus ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Baikalocyathus ✝ genus	listed (PBDB)	32	520 Ma Cambrian	516 Ma Cambrian
Baikalopectinus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Batschykicyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Bipallicyathus ✝ genus	listed (PBDB)	4	520 Ma Cambrian	520 Ma Cambrian
Borocyathus ✝ genus	listed (PBDB)
Botocyathus ✝ genus	listed (PBDB)
Botomocyathus ✝ genus	listed (PBDB)	8	520 Ma Cambrian	516 Ma Cambrian
Bractocyathus ✝ genus	listed (PBDB)	3	516 Ma Cambrian	516 Ma Cambrian
Cadniacyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Carinacyathus ✝ genus	listed (PBDB)	20	520 Ma Cambrian	516 Ma Cambrian
Carpicyathus ✝ genus	listed (PBDB)	7	520 Ma Cambrian	516 Ma Cambrian
Chabakovicyathus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	516 Ma Cambrian
Chakassicyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Churanocyathus ✝ genus	listed (PBDB)
Clathricyathus ✝ genus	listed (PBDB)	5	516 Ma Cambrian	516 Ma Cambrian
Clathrithalamus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Compositocyathus ✝ genus	listed (PBDB)	17	520 Ma Cambrian	516 Ma Cambrian
Conannulofungia ✝ genus	listed (PBDB)	2	520 Ma Cambrian	516 Ma Cambrian
Cordilleracyathus ✝ genus	listed (PBDB)	21	520 Ma Cambrian	516 Ma Cambrian
Cordobicyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Coscinoptycta ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Crassicoscinus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Crucicyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Cyathocricus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Cyclocyathella ✝ genus	listed (PBDB)	12	520 Ma Cambrian	516 Ma Cambrian
Dailycyathus ✝ genus	listed (PBDB)
Deceptioncyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Degeletticyathus ✝ genus	listed (PBDB)	28	520 Ma Cambrian	516 Ma Cambrian
Denaecyathellus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Denaecyathus ✝ genus	listed (PBDB)	5	520 Ma Cambrian	516 Ma Cambrian
Densocyathus ✝ genus	listed (PBDB)	4	516 Ma Cambrian	516 Ma Cambrian
Dentatocoscinus ✝ genus	listed (PBDB)
Dentatocyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Didymocyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Diplocyathellus ✝ genus	listed (PBDB)	5	530 Ma Cambrian	516 Ma Cambrian
Dokidocyathella ✝ genus	listed (PBDB)	7	520 Ma Cambrian	520 Ma Cambrian
Dokidocyathus ✝ genus	listed (PBDB)	97	530 Ma Cambrian	516 Ma Cambrian
Dupliporocyathus ✝ genus	listed (PBDB)
Erbocyathus ✝ genus	listed (PBDB)	17	516 Ma Cambrian	516 Ma Cambrian
Erismacoscinus ✝ genus	listed (PBDB)	106	541 Ma Cambrian	516 Ma Cambrian
Erugatocyathus ✝ genus	listed (PBDB)	21	520 Ma Cambrian	516 Ma Cambrian
Ethmocoscinus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Ethmocyathus ✝ genus	listed (PBDB)	2	541 Ma Cambrian	516 Ma Cambrian
Fallocyathus ✝ genus	listed (PBDB)	6	520 Ma Cambrian	516 Ma Cambrian
Fansycyathus ✝ genus	listed (PBDB)	5	520 Ma Cambrian	516 Ma Cambrian
Flexanulus ✝ genus	listed (PBDB)	1	541 Ma Cambrian	541 Ma Cambrian
Formosocyathus ✝ genus	listed (PBDB)	27	520 Ma Cambrian	516 Ma Cambrian
Frinalicyathus ✝ genus	listed (PBDB)	5	520 Ma Cambrian	520 Ma Cambrian
Gagarinicyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Geniculicyathus ✝ genus	listed (PBDB)
Geocyathus ✝ genus	listed (PBDB)	29	520 Ma Cambrian	516 Ma Cambrian
Gloriosocyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Gnaltacyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Gordonicyathus ✝ genus	listed (PBDB)	30	520 Ma Cambrian	516 Ma Cambrian
Gordonifungia ✝ genus	listed (PBDB)
Gumbycyathus ✝ genus	listed (PBDB)
Halysicyathus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	516 Ma Cambrian
Heckericyathus ✝ genus	listed (PBDB)	6	520 Ma Cambrian	520 Ma Cambrian
Hemithalamocyathus ✝ genus	listed (PBDB)
Hupecyathellus ✝ genus	listed (PBDB)
Hyptocyathus ✝ genus	listed (PBDB)
Ichnusocyathus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	516 Ma Cambrian
Iljinicyathus ✝ genus	listed (PBDB)
Inacyathella ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Incurvocyathus ✝ genus	listed (PBDB)
Inessocyathellus ✝ genus	listed (PBDB)
Inessocyathus ✝ genus	listed (PBDB)	32	520 Ma Cambrian	516 Ma Cambrian
Irinaecyathus ✝ genus	listed (PBDB)	75	520 Ma Cambrian	516 Ma Cambrian
Isiticyathus ✝ genus	listed (PBDB)	5	520 Ma Cambrian	516 Ma Cambrian
Jakutocarinus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Jakutocyathus ✝ genus	listed (PBDB)	19	520 Ma Cambrian	516 Ma Cambrian
Jangudacyathus ✝ genus	listed (PBDB)
Japhanicyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Jebileticoscinus ✝ genus	listed (PBDB)
Joanaecyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Kaltatocyathus ✝ genus	listed (PBDB)	16	520 Ma Cambrian	520 Ma Cambrian
Kandatocyathus ✝ genus	listed (PBDB)	4	516 Ma Cambrian	516 Ma Cambrian
Kasyricyathus ✝ genus	listed (PBDB)
Kellericyathus ✝ genus	listed (PBDB)	3	516 Ma Cambrian	516 Ma Cambrian
Kidjasocyathus ✝ genus	listed (PBDB)
Kidrjassocyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	516 Ma Cambrian
Kijacyathus ✝ genus	listed (PBDB)	6	520 Ma Cambrian	516 Ma Cambrian
Kisasacyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Kiwicyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Kiyafungia ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Kolbicyathus ✝ genus	listed (PBDB)
Kordecyathus ✝ genus	listed (PBDB)	6	516 Ma Cambrian	516 Ma Cambrian
Kotuyicoscinus ✝ genus	listed (PBDB)
Kotuyicyathellus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Kotuyicyathus ✝ genus	listed (PBDB)	11	530 Ma Cambrian	516 Ma Cambrian
Krasnopeevacyathus ✝ genus	listed (PBDB)
Kruseicyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Kymbecyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Ladaecyathus ✝ genus	listed (PBDB)	28	520 Ma Cambrian	516 Ma Cambrian
Larecyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Lenocyathus ✝ genus	listed (PBDB)	10	530 Ma Cambrian	520 Ma Cambrian
Leptosocyathellus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Leptosocyathus ✝ genus	listed (PBDB)	40	520 Ma Cambrian	516 Ma Cambrian
Loculicyathopsis ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Lunulacyathus ✝ genus	listed (PBDB)
Mackenziecyathus ✝ genus	listed (PBDB)	7	520 Ma Cambrian	516 Ma Cambrian
Mattajacyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Membranacyathus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	520 Ma Cambrian
Mennericyathus ✝ genus	listed (PBDB)	31	520 Ma Cambrian	516 Ma Cambrian
Mikhnocyathus ✝ genus	listed (PBDB)
Mootwingeecyathus ✝ genus	listed (PBDB)
Morenicyathus ✝ genus	listed (PBDB)	5	520 Ma Cambrian	520 Ma Cambrian
Mrassocyathus ✝ genus	listed (PBDB)
Muchattocyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Nalivkinicyathus ✝ genus	listed (PBDB)	8	520 Ma Cambrian	516 Ma Cambrian
Natalijaecyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Nevadacyathus ✝ genus	listed (PBDB)	4	530 Ma Cambrian	516 Ma Cambrian
Nochoroicyathellus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Nochoroicyathus ✝ genus	listed (PBDB)	275	530 Ma Cambrian	516 Ma Cambrian
Olgaecyathus ✝ genus	listed (PBDB)
Orbiasterocyathus ✝ genus	listed (PBDB)
Orbicoscinus ✝ genus	listed (PBDB)
Orbicyathellus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Orbicyathus ✝ genus	listed (PBDB)	30	520 Ma Cambrian	520 Ma Cambrian
Orienticyathus ✝ genus	listed (PBDB)
Pachycoscinus ✝ genus	listed (PBDB)
Palmericyathus ✝ genus	listed (PBDB)	6	520 Ma Cambrian	516 Ma Cambrian
Papillocyathus ✝ genus	listed (PBDB)
Parethmophyllum ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Peregrinicyathus ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Piamaecyathellus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Piamaecyathus ✝ genus	listed (PBDB)	5	516 Ma Cambrian	516 Ma Cambrian
Plicocyathus ✝ genus	listed (PBDB)	15	520 Ma Cambrian	516 Ma Cambrian
Polycoscinus ✝ genus	listed (PBDB)	2	541 Ma Cambrian	541 Ma Cambrian
Porocoscinus ✝ genus	listed (PBDB)	11	520 Ma Cambrian	516 Ma Cambrian
Porocyathus ✝ genus	listed (PBDB)	21	520 Ma Cambrian	516 Ma Cambrian
Prethmophyllum ✝ genus	listed (PBDB)	9	520 Ma Cambrian	516 Ma Cambrian
Pretiosocyathellus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	520 Ma Cambrian
Pretiosocyathus ✝ genus	listed (PBDB)	12	520 Ma Cambrian	516 Ma Cambrian
Procyathellus ✝ genus	listed (PBDB)
Pseudodegeletticyathellus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Pseudotennericyathellus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	520 Ma Cambrian
Ptretiosocyathus ✝ genus	listed (PBDB)
Putapacyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Rasetticyathus ✝ genus	listed (PBDB)	12	520 Ma Cambrian	516 Ma Cambrian
Rectannulus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Retecoscinus ✝ genus	listed (PBDB)	30	530 Ma Cambrian	520 Ma Cambrian
Retetumulus ✝ genus	listed (PBDB)
Ringifungia ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Robertocyathus ✝ genus	listed (PBDB)	7	520 Ma Cambrian	516 Ma Cambrian
Robustocyathellus ✝ genus	listed (PBDB)	7	520 Ma Cambrian	520 Ma Cambrian
Robustocyathus ✝ genus	listed (PBDB)	110	530 Ma Cambrian	516 Ma Cambrian
Rossocyathella ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Rotundocyathus ✝ genus	listed (PBDB)	88	530 Ma Cambrian	516 Ma Cambrian
Rowanpectinus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Rozanovicoscinus ✝ genus	listed (PBDB)	6	520 Ma Cambrian	516 Ma Cambrian
Rozanovicyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Rudanulus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	516 Ma Cambrian
Russocyathus ✝ genus	listed (PBDB)	6	520 Ma Cambrian	516 Ma Cambrian
Sajanocyathus ✝ genus	listed (PBDB)	15	520 Ma Cambrian	516 Ma Cambrian
Salairocyathus ✝ genus	listed (PBDB)
Sanarkocyathus ✝ genus	listed (PBDB)	4	520 Ma Cambrian	516 Ma Cambrian
Sanarkophyllum ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Schumnyicyathus ✝ genus	listed (PBDB)
Sclerocyathus ✝ genus	listed (PBDB)	6	530 Ma Cambrian	520 Ma Cambrian
Sekwicyathus ✝ genus	listed (PBDB)	8	520 Ma Cambrian	516 Ma Cambrian
Sichotecyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	516 Ma Cambrian
Sigmocoscinus ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Sigmocyathus ✝ genus	listed (PBDB)
Somphocyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Squamosocyathus ✝ genus	listed (PBDB)	4	520 Ma Cambrian	516 Ma Cambrian
Stapicyathus ✝ genus	listed (PBDB)	7	520 Ma Cambrian	516 Ma Cambrian
Statanulocyathus ✝ genus	listed (PBDB)
Stephanicyathus ✝ genus	listed (PBDB)
Stephenicyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Stillicidocyathus ✝ genus	listed (PBDB)
Subtilocyathus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Subtumulocyathellus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Svetlanocyathus ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Sylviacoscinus ✝ genus	listed (PBDB)
Syringocyathus ✝ genus	listed (PBDB)	13	516 Ma Cambrian	516 Ma Cambrian
Tabulacyathus ✝ genus	listed (PBDB)	5	520 Ma Cambrian	516 Ma Cambrian
Taylorcyathus ✝ genus	listed (PBDB)	46	530 Ma Cambrian	516 Ma Cambrian
Tegerocyathus ✝ genus	listed (PBDB)	19	516 Ma Cambrian	516 Ma Cambrian
Tennericyathus ✝ genus	listed (PBDB)	11	530 Ma Cambrian	516 Ma Cambrian
Tercyathellus ✝ genus	listed (PBDB)	11	516 Ma Cambrian	516 Ma Cambrian
Tercyathus ✝ genus	listed (PBDB)	16	516 Ma Cambrian	516 Ma Cambrian
Terraecyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Tersicyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Thalamocyathellus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Thalamocyathus ✝ genus	listed (PBDB)	23	541 Ma Cambrian	516 Ma Cambrian
Thalamopectinus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Tologoicyathus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	520 Ma Cambrian
Tomocyathus ✝ genus	listed (PBDB)	19	520 Ma Cambrian	516 Ma Cambrian
Torosocyathella ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Torosocyathellus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Torosocyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Trininaecyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Tubicoscinus ✝ genus	listed (PBDB)	8	520 Ma Cambrian	516 Ma Cambrian
Tumulifungia ✝ genus	listed (PBDB)	21	520 Ma Cambrian	516 Ma Cambrian
Tumulocoscinus ✝ genus	listed (PBDB)	10	520 Ma Cambrian	520 Ma Cambrian
Tumulocyathoides ✝ genus	listed (PBDB)	9	520 Ma Cambrian	520 Ma Cambrian
Tumulocyathus ✝ genus	listed (PBDB)	57	530 Ma Cambrian	516 Ma Cambrian
Urcyathella ✝ genus	listed (PBDB)
Urcyathus ✝ genus	listed (PBDB)	10	520 Ma Cambrian	516 Ma Cambrian
Ussuricyathus ✝ genus	listed (PBDB)	5	520 Ma Cambrian	516 Ma Cambrian
Veronicacyathus ✝ genus	listed (PBDB)	8	520 Ma Cambrian	516 Ma Cambrian
Vologdinocyathellus ✝ genus	listed (PBDB)	2	520 Ma Cambrian	520 Ma Cambrian
Vologdinocyathus ✝ genus	listed (PBDB)	3	516 Ma Cambrian	516 Ma Cambrian
Voroninicyathus ✝ genus	listed (PBDB)	1	516 Ma Cambrian	516 Ma Cambrian
Wrighticyathus ✝ genus	listed (PBDB)
Xestecyathus ✝ genus	listed (PBDB)
Yhecyathus ✝ genus	listed (PBDB)	2	516 Ma Cambrian	516 Ma Cambrian
Yudjaicyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Yukonocyathus ✝ genus	listed (PBDB)	3	520 Ma Cambrian	516 Ma Cambrian
Zhuravlevaecyathus ✝ genus	listed (PBDB)	1	520 Ma Cambrian	520 Ma Cambrian
Zonacoscinus ✝ genus	listed (PBDB)
Zonacyathus ✝ genus	listed (PBDB)	17	520 Ma Cambrian	516 Ma Cambrian

Synonymy List

Year	Name and Author
1939	Ajacicyathida Bedford and Bedford
2002	Ajacicyathida Sepkoski, Jr.

References

Sepkoski, Jr. J. J. (2002) A compendium of fossil marine animal genera, Bulletins of American Paleontology 363, 1-560

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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