†Thecaspinellum Nikolayeva 1949 (horn coral)
Anthozoa - Cystiphyllida - Tryplasmatidae
Parent taxon: Tryplasmatidae according to A. I. Lavrusevich 1971
Sister taxa: Loboplasma, Porpites, Storthygophyllum, Tryplasmatinae
Subtaxa: Thecaspinellum daljanicum, Thecaspinellum longiseptatum
Ecology: stationary epifaunal suspension feeder