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Paucisphaeridium inversibuccinum forma bipolare
Paucisphaeridium inversibuccinum forma bipolare De Coninck, 1986
Name not validly published since de Coninck, 1986 did not designate a holotype.
NOW Paucisphaeridium inversibuccinum subsp. bipolare. Originally Paucisphaeridium inversibuccinum forma bipolare (name not validly published), subsequently (and now) Paucisphaeridium inversibuccinum subsp. bipolare.
Age: Middle Eocene-Early Oligocene (Bartonian-TongIian).
Original description (De Coninck, 1986)
Remarks: This form differs from the holotype (Davey & Williams, 1966b, p. 82, pl. 12, fig. 3) in the bipolar distribution of the processes: six to seven around the apical pole and six around the antapical pole. Eaton recorded a similar form with processes distributed in a precingular and postcingular series, among the specimens recovered from the Bracklesham Beds. In my material other specimens do not show such a marked bipolar distribution and show more resemblance to the species holotype. For that reason I propose the forma bipolaris for the specimens with marked bipolar ornamentation.
Name not validly published since de Coninck, 1986 did not designate a holotype.
NOW Paucisphaeridium inversibuccinum subsp. bipolare. Originally Paucisphaeridium inversibuccinum forma bipolare (name not validly published), subsequently (and now) Paucisphaeridium inversibuccinum subsp. bipolare.
Age: Middle Eocene-Early Oligocene (Bartonian-TongIian).
Original description (De Coninck, 1986)
Remarks: This form differs from the holotype (Davey & Williams, 1966b, p. 82, pl. 12, fig. 3) in the bipolar distribution of the processes: six to seven around the apical pole and six around the antapical pole. Eaton recorded a similar form with processes distributed in a precingular and postcingular series, among the specimens recovered from the Bracklesham Beds. In my material other specimens do not show such a marked bipolar distribution and show more resemblance to the species holotype. For that reason I propose the forma bipolaris for the specimens with marked bipolar ornamentation.