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Kallosphaeridium curiosum
Kallosphaeridium curiosum Bujak, 1984
Now Batiacasphaera. Originally Kallosphaeridium, subsequently (and now) Batiacasphaera.
Holotype: Bujak, 1984, pl. 2, fig. 19
Locus typicus: Aleutian Abyssal Plain, northern N Pacific
Stratum typicum: Middle-Late Eocene
Original diagnosis: Bujak, 1984, p. 188
Cyst subspherical to ovoidal, sometimes with poorly developed lateral and antapical lobes. Periphragm granulate with a few randomly distributed longer spines up to about 6 Ám in length. Cingulum and sulcus poorly defined or absent. Archeopyle apical tAa, remaining attached to the cyst along the "tAa" and possibly also the 4"/6" boundary.
Original description: Bujak, 1984, p. 188
The cyst is subspherical to ovoidal, sometimes with two lateral and two antapical lobes that are poorly developed. The periphragm has a dense covering of granules or very short spines, always with a few distinctly longer spines--up to 6 Ám in length. These longer spines, which appear to be randomly distributed, are solid and slender, with flared distal terminations. On some specimens the presence of a cingulum is suggested by a slight indentation and fewer granules. The adcingular margins may also be marked by slight thickenings of the wall. The archeopyle comprises the four apical plates and it remains attached ventrally to the cyst. The fourth apical plate appears to contact the sixth precingular so that opercular attachment would be along the bound- aries 1"/Sa and 4"/6".
Now Batiacasphaera. Originally Kallosphaeridium, subsequently (and now) Batiacasphaera.
Holotype: Bujak, 1984, pl. 2, fig. 19
Locus typicus: Aleutian Abyssal Plain, northern N Pacific
Stratum typicum: Middle-Late Eocene
Original diagnosis: Bujak, 1984, p. 188
Cyst subspherical to ovoidal, sometimes with poorly developed lateral and antapical lobes. Periphragm granulate with a few randomly distributed longer spines up to about 6 Ám in length. Cingulum and sulcus poorly defined or absent. Archeopyle apical tAa, remaining attached to the cyst along the "tAa" and possibly also the 4"/6" boundary.
Original description: Bujak, 1984, p. 188
The cyst is subspherical to ovoidal, sometimes with two lateral and two antapical lobes that are poorly developed. The periphragm has a dense covering of granules or very short spines, always with a few distinctly longer spines--up to 6 Ám in length. These longer spines, which appear to be randomly distributed, are solid and slender, with flared distal terminations. On some specimens the presence of a cingulum is suggested by a slight indentation and fewer granules. The adcingular margins may also be marked by slight thickenings of the wall. The archeopyle comprises the four apical plates and it remains attached ventrally to the cyst. The fourth apical plate appears to contact the sixth precingular so that opercular attachment would be along the bound- aries 1"/Sa and 4"/6".