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Kisselevia pengchiahsuensis
Kisselevia pengchiahsuensis Shaw Chenglong, 1999a, p.40
NOW Charlesdowniea. Originally Kisselevia, subsequently (and now) Charlesdowniea.
Holotype: Shaw Chenglong, 1999a, figs.5-7.
Age: Eocene.
Original description (Shaw Chenglong, 1999a):
Kisselovia pengchiahusuensis C. L. Shaw sp. nov.
Holotype slide: OK-2 1700- (4); Figs. 5-6; film WA70-4, WA70-5, WA70-6 (holotype at three focus levels); CPC Micropaleontology Lab.
Description: Cysts quardragonal with apical, two lateral and antapical horns with endophragm, periphragm and ectophragm; intercalary Archeopyle; about 93-100 µm wide. Pericoel totally enclosing endophragm. Ectocoel between periphragm and ectophragm. Parasuture with gonal tubiform processes. Processes arising from periphragm, hollow, connecting with pericole., surface features with tubiform processes, the tubiforms about 6-11 µm long.
Dimensions:
Holotype – Overall length 72 µm long, breadth 100 µm wide, length of endocyst 52 µm long, breadth 62 µm wide, surface features with tubiform processes, the tubiforms about 6-10 µm long.
Range – Overall length 72-89 µm long, breadth 93-100 µm wide, length of the endocyst 52-53 µm long, breadth 60-62 µm wide, length of processes 6-11 µm µm (n=3).
Stratigraphic occurrence: Eocene (OK-2 well, 170m)
Derivation of name: the specific epithet, pengchiahsuensis is derived from the Pengchiahsu Basin of the type locality
Remarks: the new species most closely resembles Kisselovia coleothrypta (Williams & Downie) Lentin & Williams in having a roughly similar outline. However if differs from that in having four horns, and in having a smaller size and shorter tubiformed appendages.
NOW Charlesdowniea. Originally Kisselevia, subsequently (and now) Charlesdowniea.
Holotype: Shaw Chenglong, 1999a, figs.5-7.
Age: Eocene.
Original description (Shaw Chenglong, 1999a):
Kisselovia pengchiahusuensis C. L. Shaw sp. nov.
Holotype slide: OK-2 1700- (4); Figs. 5-6; film WA70-4, WA70-5, WA70-6 (holotype at three focus levels); CPC Micropaleontology Lab.
Description: Cysts quardragonal with apical, two lateral and antapical horns with endophragm, periphragm and ectophragm; intercalary Archeopyle; about 93-100 µm wide. Pericoel totally enclosing endophragm. Ectocoel between periphragm and ectophragm. Parasuture with gonal tubiform processes. Processes arising from periphragm, hollow, connecting with pericole., surface features with tubiform processes, the tubiforms about 6-11 µm long.
Dimensions:
Holotype – Overall length 72 µm long, breadth 100 µm wide, length of endocyst 52 µm long, breadth 62 µm wide, surface features with tubiform processes, the tubiforms about 6-10 µm long.
Range – Overall length 72-89 µm long, breadth 93-100 µm wide, length of the endocyst 52-53 µm long, breadth 60-62 µm wide, length of processes 6-11 µm µm (n=3).
Stratigraphic occurrence: Eocene (OK-2 well, 170m)
Derivation of name: the specific epithet, pengchiahsuensis is derived from the Pengchiahsu Basin of the type locality
Remarks: the new species most closely resembles Kisselovia coleothrypta (Williams & Downie) Lentin & Williams in having a roughly similar outline. However if differs from that in having four horns, and in having a smaller size and shorter tubiformed appendages.