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Lejeunecysta spatiosa
Lejeunecysta spatiosa (Morgenroth, 1966) Wilson and Clowes, 1980
Originally Lejeunia (an illegitimate generic name), subsequently Maduradinium, thirdly (and now) Lejeunecysta.
Lentin and Williams, 1976, transferred this species to Maduradinium Cookson and Eisenack, 1970. Stover and Evitt, 1978, retained it in Lejeunia Gerlach, 1961 (an illegitimate generic name).
Lentin and Williams, 1981, also effected the transfer of this species to Lejeunecysta.
Holotype: Morgenroth, 1966, pl.1, fig.5
Age: Early Oligocene
Original Description Lejeunia spatiosa n. sp. Plate 1, Fig. 5
Derivatio nominis: spatiosus Latin = of great extent.
Holotype: The one in Slide H12 preserved specimen shown on plate 1, Fig. 5. Paratypoid: H5.
Locus typicus: Depold'sche Ziegelei (locally Helmstedt).
Stratum typicum: lower Oligocene.
Diagnose: A species of the genus Lejeunia with a broad granulated theca. The clearly depressed longitudinal furrow is limited on the hypocyst by two sharp straight edges. The transverse furrow is weakly indicated.
Description: The large, clearly granulated theca has a bilaterally symmetrical pentagonal outline. The cone-shaped epithet is rounded at the apex. The barely prominent transverse furrow runs in a slightly left-handed spiral. It is slightly sunk into the theca. Ventrally it is interrupted by the very deeply depressed, very wide transverse furrow, which is delimited by 2 sharp edges. The two clearly pronounced antapical horns are of unequal length.—No archeopyle was observed.
Dimensions:
Holotype: Cyst length: 84µ, cyst width: 110µ
Paratype: Cyst length: 81µ, cyst width: 101µ
Number of specimens measured: 2.
Comparison: The new species differs from Lejeunia hyalina GERLACH - apart from the dimensions - in the clear granulation of the theca, on which there are no vertical "folds". In contrast to the long furrow, which is very pronounced in the new species, this is only hinted at in Lejeunia hyalina.
Originally Lejeunia (an illegitimate generic name), subsequently Maduradinium, thirdly (and now) Lejeunecysta.
Lentin and Williams, 1976, transferred this species to Maduradinium Cookson and Eisenack, 1970. Stover and Evitt, 1978, retained it in Lejeunia Gerlach, 1961 (an illegitimate generic name).
Lentin and Williams, 1981, also effected the transfer of this species to Lejeunecysta.
Holotype: Morgenroth, 1966, pl.1, fig.5
Age: Early Oligocene
Original Description Lejeunia spatiosa n. sp. Plate 1, Fig. 5
Derivatio nominis: spatiosus Latin = of great extent.
Holotype: The one in Slide H12 preserved specimen shown on plate 1, Fig. 5. Paratypoid: H5.
Locus typicus: Depold'sche Ziegelei (locally Helmstedt).
Stratum typicum: lower Oligocene.
Diagnose: A species of the genus Lejeunia with a broad granulated theca. The clearly depressed longitudinal furrow is limited on the hypocyst by two sharp straight edges. The transverse furrow is weakly indicated.
Description: The large, clearly granulated theca has a bilaterally symmetrical pentagonal outline. The cone-shaped epithet is rounded at the apex. The barely prominent transverse furrow runs in a slightly left-handed spiral. It is slightly sunk into the theca. Ventrally it is interrupted by the very deeply depressed, very wide transverse furrow, which is delimited by 2 sharp edges. The two clearly pronounced antapical horns are of unequal length.—No archeopyle was observed.
Dimensions:
Holotype: Cyst length: 84µ, cyst width: 110µ
Paratype: Cyst length: 81µ, cyst width: 101µ
Number of specimens measured: 2.
Comparison: The new species differs from Lejeunia hyalina GERLACH - apart from the dimensions - in the clear granulation of the theca, on which there are no vertical "folds". In contrast to the long furrow, which is very pronounced in the new species, this is only hinted at in Lejeunia hyalina.