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Impletosphaeridium oblongatum
Impletosphaeridium oblongatum Islam, 1983
Sr. homonym of Impletosphaeridium oblongatum (Jiabo, 1978 ex Lentin and Williams, 1981) Chen et al., 1988
Holotype: Islam, 1983, pl.3, fig.8
Locus typicus: London Clay, Division D, England
Stratum typicum: Early Eocene
Original diagnosis Islam, 1983, p.240:
The cyst is ellipsoidal, prolate, skolochorate and biphragmal; the two phragma are closely adpressed, faintly reticulate or chagrinate; possesses numerous nontabular thin solid slender to somewhat flexible processes which are distally bifurcate with outstretched forks like "flying seagul)"; grouping of some processes may impart an image of partial paratabulation; a pylome is not seen.
Dimensions: Holotype: cyst body 30 x 21 µm, length of processes 12-15 µm. Range: cyst length 31(28) 21 µm breadth 23(19) 16 µm, length of processes 10-17 µm. Specimens measured: 10.
Remarks:
Islam, 1983, p.240:
It differs from other species of the genus in possessing a prolate cyst. Length of its processes nearly equals the shorter cyst diameter. In process morphology, it resembles I. Iigospinosum (De Coninck) which has a subspherical cyst possessing processes less than half cyst diameter in length.
Sr. homonym of Impletosphaeridium oblongatum (Jiabo, 1978 ex Lentin and Williams, 1981) Chen et al., 1988
Holotype: Islam, 1983, pl.3, fig.8
Locus typicus: London Clay, Division D, England
Stratum typicum: Early Eocene
Original diagnosis Islam, 1983, p.240:
The cyst is ellipsoidal, prolate, skolochorate and biphragmal; the two phragma are closely adpressed, faintly reticulate or chagrinate; possesses numerous nontabular thin solid slender to somewhat flexible processes which are distally bifurcate with outstretched forks like "flying seagul)"; grouping of some processes may impart an image of partial paratabulation; a pylome is not seen.
Dimensions: Holotype: cyst body 30 x 21 µm, length of processes 12-15 µm. Range: cyst length 31(28) 21 µm breadth 23(19) 16 µm, length of processes 10-17 µm. Specimens measured: 10.
Remarks:
Islam, 1983, p.240:
It differs from other species of the genus in possessing a prolate cyst. Length of its processes nearly equals the shorter cyst diameter. In process morphology, it resembles I. Iigospinosum (De Coninck) which has a subspherical cyst possessing processes less than half cyst diameter in length.