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Polysphaeridium majus
Polysphaeridium?"majus" (Lejeune-Carpentier, 1940, p.B220–B221; text-fig.13) Corradini, 1973, p.149. Emendation: Lejeune-Carpentier and Sarjeant, 1981, p.12, as Amphorosphaeridium majus.
NOW Exochosphaeridium. Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly Cordosphaeridium, fourthly Dapsilidinium? (combination not validly published), fifthly Amphorosphaeridium, sixthly (and now) Exochosphaeridium. Questionable assignment: Stover and Evitt (1978, p.76).
Taxonomic junior synonym: Baltisphaeridium (as Exochosphaeridium) bifidum, including the subspecies Exochosphaeridium bifidum var. involutum (as Exochosphaeridium bifidum subsp. involutum), both according to Peyrot (2011, p.284).
Holotype: Lejeune-Carpentier, 1940, text-fig.13; Streel et al., 1977, pl.1, fig.7; Lejeune-Carpentier and Sarjeant, 1981, pl.2, figs.6–7; text-fig.7.
Age: Late Cretaceous.
NOW Exochosphaeridium. Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly Cordosphaeridium, fourthly Dapsilidinium? (combination not validly published), fifthly Amphorosphaeridium, sixthly (and now) Exochosphaeridium. Questionable assignment: Stover and Evitt (1978, p.76).
Taxonomic junior synonym: Baltisphaeridium (as Exochosphaeridium) bifidum, including the subspecies Exochosphaeridium bifidum var. involutum (as Exochosphaeridium bifidum subsp. involutum), both according to Peyrot (2011, p.284).
Holotype: Lejeune-Carpentier, 1940, text-fig.13; Streel et al., 1977, pl.1, fig.7; Lejeune-Carpentier and Sarjeant, 1981, pl.2, figs.6–7; text-fig.7.
Age: Late Cretaceous.