Exochosphaeridium striolatum var. truncatum
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"var. truncatum" Davey, 1969a, p.164-166, pl.7, figs.1-3. Emendations: Masure, 1988b, p.129 and Harker and Sarjeant in Harker et al., 1990, p.73-74, both as Pervosphaeridium truncatum. Holotype: Davey, 1969a, pl.7, fig.2; Masure, 1988b, pl.4, figs.6A-B; text-fig.5, nos.1-2. NOW Pervosphaeridium truncatum. Originally Exochosphaeridium striolatum var. truncatum, subsequently Exochosphaeridium striolatum subsp. truncatum, thirdly Exochosphaeridium? truncatum, fourthly (and now) Pervosphaeridium truncatum. Age: Cenomanian. Parent: Exochosphaeridium striolatum
