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Eisenackia formosana
Eisenackia formosana Shaw Chenglong, 1999b, p.195, figs.133-135.
Holotype: Shaw Chenglong, 1999b, figs.133-135.
Age: Eocene.
Original description (Shaw Chenglong, 1999)
Description: Spherical to subspherical cyst, diameter 45-51 µm; parasutural features relatively narrow, linear rand low ridges between raised intratabular areas, with crumpled-conical penitabular processes. Paracingulum indicated by transversely elongate penitabular ridges. Apical archeopyle.
Stratigraphic occurrence: Eocene (OK-2 well, 1916m)
Derivation of name: The specific epithet formosana is derived from the name of the type locality.
Dimensions: holotype: Overall 52 µm long, 48 µm wide, cyst 46 µm long, 46 µm wide, surface features with crumpled-conical penitabular processes up to 4-9 µm long. Paracingulum indicated by tapering processes (n>10), the processes up to 7 µm long.
Remarks: The new species most closely resembles Eisenackia crassitabulata Deflandre & Cookson emend. McLean in having a roughly similar outline; however, it differs both in having crumpled-conical penitabular processes, and in having a tapering processes on the paracingulum.
Holotype: Shaw Chenglong, 1999b, figs.133-135.
Age: Eocene.
Original description (Shaw Chenglong, 1999)
Description: Spherical to subspherical cyst, diameter 45-51 µm; parasutural features relatively narrow, linear rand low ridges between raised intratabular areas, with crumpled-conical penitabular processes. Paracingulum indicated by transversely elongate penitabular ridges. Apical archeopyle.
Stratigraphic occurrence: Eocene (OK-2 well, 1916m)
Derivation of name: The specific epithet formosana is derived from the name of the type locality.
Dimensions: holotype: Overall 52 µm long, 48 µm wide, cyst 46 µm long, 46 µm wide, surface features with crumpled-conical penitabular processes up to 4-9 µm long. Paracingulum indicated by tapering processes (n>10), the processes up to 7 µm long.
Remarks: The new species most closely resembles Eisenackia crassitabulata Deflandre & Cookson emend. McLean in having a roughly similar outline; however, it differs both in having crumpled-conical penitabular processes, and in having a tapering processes on the paracingulum.