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Eisenackia rugolirata
Eisenackia rugolirata (Damassa, 1979b, p.193-194,196, pl.3, figs.7-13,21,23,27; text-fig.2) Quattrocchio and Sarjeant, 2003, p.146.
Taxonomic senior synonym: Agerasphaera (now Eisenackia) margarita, according to Damassa and Harland in Lentin and Williams (1989, p.10). On proposing this combination, Quattrocchio and Sarjeant did not acknowledge its earlier proposed synonymy with Agerasphaera margarita; hence, we continue to follow the synonymy proposed by Damassa and Harland in Lentin and Williams (1989, p. 10).
Holotype: Damassa, 1979b, pl.3, figs.7-11; Fauconnier and Masure, 2004, pl.2, figs.7-11.
Age: Early Paleocene.
(Damassa, 1979b)
Diag1nosis: Cyst spherical to subspherical; paratabulation indicated by low penitabular ridges. Accessory ridges commonly developed more or less parallel to the penitabular ridges. Penitabular and accessory ridges have a distinctly crinkled appearance. Archeopyle Type (tA).
Derivation of name: Latin, ruga, crease, wrinkle; Latin, lira, furrow-slice, earth or ridge thrown up by plow, with reference to the crinkled character of the penitabular ridges.
Description: cyst spherical to subspherical, 38-50 µm in diameter; length generally slightly greater than width. Paratabulation indicated by thin, transparent penitabular ridges. 2-4 µm in height, bearing minute protrusions which gave the ridges a distinctly crinkled appearance. Discontinuous accessory ridges are more or less parallel to the penitabular ridges, and are commonly developed on large pre- and postcingular paraplates. Surface of cyst generally smooth, but may have slight irregularities. Archeopyle Type (tA); operculum free, but not observed. Parasulcal notch on ventral surface well-developed. Precingular paraplates 1’’-5’’ similar in size, sixth precingular paraplates slightly reduced in size with respect to 1’’-5’’. Cingular paraplate indicated by penitabular ridges having a rectangular outline. Postcingular paraplate series completely developed 3’’’-5’’’lage, 2’’’and 6’’’are small and 1’’’is greatly reduced in size relative to the other paraplates in the series. Sulcal paraplates also completely delineated. Antapical paraplate pentagonal, bordered by 1p, 3’’’, 4’’’, 5’’’, ps; not in contact with 6’’’.
Paratbaulation: ?pr, ?4’, 6’’, 6c, 5s, 1p, 6’’’, 1’’’
Taxonomic senior synonym: Agerasphaera (now Eisenackia) margarita, according to Damassa and Harland in Lentin and Williams (1989, p.10). On proposing this combination, Quattrocchio and Sarjeant did not acknowledge its earlier proposed synonymy with Agerasphaera margarita; hence, we continue to follow the synonymy proposed by Damassa and Harland in Lentin and Williams (1989, p. 10).
Holotype: Damassa, 1979b, pl.3, figs.7-11; Fauconnier and Masure, 2004, pl.2, figs.7-11.
Age: Early Paleocene.
(Damassa, 1979b)
Diag1nosis: Cyst spherical to subspherical; paratabulation indicated by low penitabular ridges. Accessory ridges commonly developed more or less parallel to the penitabular ridges. Penitabular and accessory ridges have a distinctly crinkled appearance. Archeopyle Type (tA).
Derivation of name: Latin, ruga, crease, wrinkle; Latin, lira, furrow-slice, earth or ridge thrown up by plow, with reference to the crinkled character of the penitabular ridges.
Description: cyst spherical to subspherical, 38-50 µm in diameter; length generally slightly greater than width. Paratabulation indicated by thin, transparent penitabular ridges. 2-4 µm in height, bearing minute protrusions which gave the ridges a distinctly crinkled appearance. Discontinuous accessory ridges are more or less parallel to the penitabular ridges, and are commonly developed on large pre- and postcingular paraplates. Surface of cyst generally smooth, but may have slight irregularities. Archeopyle Type (tA); operculum free, but not observed. Parasulcal notch on ventral surface well-developed. Precingular paraplates 1’’-5’’ similar in size, sixth precingular paraplates slightly reduced in size with respect to 1’’-5’’. Cingular paraplate indicated by penitabular ridges having a rectangular outline. Postcingular paraplate series completely developed 3’’’-5’’’lage, 2’’’and 6’’’are small and 1’’’is greatly reduced in size relative to the other paraplates in the series. Sulcal paraplates also completely delineated. Antapical paraplate pentagonal, bordered by 1p, 3’’’, 4’’’, 5’’’, ps; not in contact with 6’’’.
Paratbaulation: ?pr, ?4’, 6’’, 6c, 5s, 1p, 6’’’, 1’’’