Tubotuberella sphaerocephala
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"sphaerocephala" Vozzhennikova, 1967, p.181, pl.103, figs.1a–b,2,3a–b; pl.104, figs.4,5a–b. Holotype: Vozzhennikova, 1967, pl.103, fig.2; Lentin and Vozzhennikova, 1990, text-fig.55; lost according to Lentin and Vozzhennikova (1990, p.98). Originally Tubotuberella, subsequently Dimidiadinium. Taxonomic senior synonym: Gonyaulax (as and now Gonyaulacysta) eisenackii, according to Sarjeant (1982b, p.32). Vozzhennikova originally spelled the epithet as "sphaerocephalus" but indicated it to be an adjective; hence it is here revised to "sphaerocephala". Age: Late Jurassic.
Parent: Tubotuberella