Opinions from D. V. Osadchaya et al. 1979
- 'Abakanicyathus belongs to Archaeocyathida'
- 'Alexandricyathus belongs to Ajacicyathida'
- 'Alexandricyathus ultrus belongs to Alexandricyathus'
- 'Arisacyathus belongs to Archaeocyathida'
- 'Arisacyathus diligens belongs to Arisacyathus'
- 'Arisacyathus secundus belongs to Arisacyathus'
- 'Basanellus belongs to Trilobita'
- 'Beldirella belongs to Trilobita'
- 'Claruscyathus belongs to Archaeocyathida'
- 'Clathricoscinus sanaschtykgolensis belongs to Clathricoscinus'
- 'Clathricyathellus belongs to Regulares'
- 'Coscinocyathus howelli is recombined as Nochoroicyathus howelli'
- 'Denaecyathellus belongs to Ajacicyathida'
- 'Dokidocyathus bogradiensis belongs to Dokidocyathus'
- 'Eleganolimba is a subjective synonym of Tuvanella'
- 'Ezhimia belongs to Trilobita'
- 'Galinaecyathus belongs to Monocyathida'
- 'Glabrella belongs to Trilobita'
- 'Globosocyathus marinae belongs to Globosocyathus'
- 'Granularia belongs to Trilobita'
- 'Ivshiniellus belongs to Trilobita'
- 'Juliaspis belongs to Trilobita'
- 'Kandatocyathus belongs to Ajacicyathida'
- 'Kandatocyathus kalleganovi belongs to Kandatocyathus'
- 'Kotuyicyathellus belongs to Ajacicyathida'
- 'Kotuyicyathellus minus belongs to Kotuyicyathellus'
- 'Ladadiscus belongs to Trilobita'
- 'Larecyathus belongs to Ajacicyathida'
- 'Larecyathus infinitus belongs to Larecyathus'
- 'Leptosocyathellus mirandus belongs to Leptosocyathellus'
- 'Lermontoviella belongs to Trilobita'
- 'Limataceps belongs to Trilobita'
- 'Nochoroicyathellus belongs to Ajacicyathida'
- 'Nochoroicyathellus activus belongs to Nochoroicyathellus'
- 'Nochoroicyathus diadromus belongs to Nochoroicyathus'
- 'Nochoroicyathus fragilis belongs to Nochoroicyathus'
- 'Paleooryctocephalus belongs to Trilobita'
- 'Piamaecyathus belongs to Ajacicyathida'
- 'Planocephalus belongs to Trilobita'
- 'Porocyathellus cyroflexus belongs to Porocyathellus'
- 'Pretiosocyathellus belongs to Ajacicyathida'
- 'Pretiosocyathellus toltschiensis belongs to Pretiosocyathellus'
- 'Prismocyathus belongs to Archaeocyathida'
- 'Pseudodegeletticyathellus belongs to Ajacicyathida'
- 'Pseudotennericyathellus belongs to Ajacicyathida'
- 'Pseudotennericyathellus latus belongs to Pseudotennericyathellus'
- 'Pseudotennericyathellus nelliae belongs to Pseudotennericyathellus'
- 'Rarocyathus rarus belongs to Rarocyathus'
- 'Retecyathus belongs to Archaeocyathida'
- 'Rhabdocyathella belongs to Monocyathida'
- 'Sigmofungia diletata belongs to Sigmofungia'
- 'Spirocyathus belongs to Archaeocyathida'
- 'Subtumulocyathellus belongs to Ajacicyathida'
- 'Subtumulocyathellus vulgaris belongs to Subtumulocyathellus'
- 'Tannuolaspis is a subjective synonym of Pararaia'
- 'Tegerocyathella expansiva belongs to Tegerocyathella'
- 'Tegerocyathus karakolicus belongs to Tegerocyathus'
- 'Tennericyathus veronicae belongs to Tennericyathus'
- 'Tersicyathus belongs to Ajacicyathida'
- 'Thalamocyathellus belongs to Ajacicyathida'
- 'Thalamocyathellus inclinatus belongs to Thalamocyathellus'
- 'Torosocyathellus belongs to Ajacicyathida'
- 'Torosocyathellus torosus belongs to Torosocyathellus'
- 'Trapezocephalina belongs to Trilobita'
- 'Tumulocyathus raroseptatus belongs to Tumulocyathus'
- 'Tumulocyathus subpustulatus belongs to Tumulocyathus'
- 'Usumunaspis belongs to Trilobita'
- 'Vadimocyathus belongs to Archaeocyathida'
- 'Vadimocyathus chikinevae belongs to Vadimocyathus'
- 'Voroninicyathus belongs to Ajacicyathida'
- 'Voznesenskicyathus belongs to Archaeocyathida'