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Emslandia spiridoides
Emslandia spiroides (Benedek, 1972) emend. Benedek and Sarjeant, 1981
Now Apteodinium. Originally (and now) Apteodinium, subsequently Emslandia. Jan du Chêne et al. (1986a, p.48) retained this species in Apteodinium.
Tax. sr. synonym of Apteodinium tectatum Piasecki, 1980, according to Lucas-Clark, 1987.
Holotype: Benedek, 1972, pl.2, fig.1a-b; Benedek and Sarjeant, 1981, Fig.2, nos.1-3
Paratypes: Benedek, 1972; Jan du Chêne et al., 1986, pl.11, figs.6-9
Locus typicus: T÷nisberg, Niederrhein, Germany
Stratum typicum: Middle Oligocene
Original description: Benedek, 1972
Original description: Benedek, 1972, p. 5: Apteodinium spiridoides
Diagnosis: An Apteodinium species with the following features: the rounded ovoidal, in outline diamond-shaped shell, has an up to 5 Ám thick, apparently strongly granulate wall. The veined wall seems to be patterned with white stains.
Description: yellow-brownish membrane, epitheca and hypotheca are separated by a narrow, hardly indented, sometimes not visible girdle-furrow. There is only an indication of a longitudinal furrow. Apical and antapical processes are not observed. All specimens possess a rounded trapezoidal opening in precingular position.
Dimensions: shell length 76 (72-78) Ám, width 72-74 Ám, pylome 30x40 Ám, wall 5 Ám.
Emended Diagnosis: Benedek and Sarjeant, 1981, p. 319
Cyst proximate, subglobular to broadly subpolygonal. Epitract in the form of a rounded and trucated cone, crowned by a broad, low apical prominence: hypotract hemispherical. Phragma thick, two-layered; endophragm quite thin, periphragm roughly twelve to fifteen times thicker (total thickness c. 5 Ám) and perforated by an irregular pattern of cavities and canals, sometimes opening to the exterior. Paracingulum well marked by an indentation of the periphragm surface and bordered by narrow ridges; its two ends are only slightly offset. Parasulcus similarly marked and extending for a short distance anterior, and a greater distance posterior, to the paracingulum. Surface of periphragm granulate to finely scabrate. Archaeopyle single-plate precingular, Type P.
Dimensions: Holotype: length 76 Ám, breadth 73 Ám, thickness of wall 5 Ám. Range of Dimensions: Length 72-78 Ám, breadth 72-74 Ám, thickness of wall 5 Ám. Material: 7 specimens.
Now Apteodinium. Originally (and now) Apteodinium, subsequently Emslandia. Jan du Chêne et al. (1986a, p.48) retained this species in Apteodinium.
Tax. sr. synonym of Apteodinium tectatum Piasecki, 1980, according to Lucas-Clark, 1987.
Holotype: Benedek, 1972, pl.2, fig.1a-b; Benedek and Sarjeant, 1981, Fig.2, nos.1-3
Paratypes: Benedek, 1972; Jan du Chêne et al., 1986, pl.11, figs.6-9
Locus typicus: T÷nisberg, Niederrhein, Germany
Stratum typicum: Middle Oligocene
Original description: Benedek, 1972
Original description: Benedek, 1972, p. 5: Apteodinium spiridoides
Diagnosis: An Apteodinium species with the following features: the rounded ovoidal, in outline diamond-shaped shell, has an up to 5 Ám thick, apparently strongly granulate wall. The veined wall seems to be patterned with white stains.
Description: yellow-brownish membrane, epitheca and hypotheca are separated by a narrow, hardly indented, sometimes not visible girdle-furrow. There is only an indication of a longitudinal furrow. Apical and antapical processes are not observed. All specimens possess a rounded trapezoidal opening in precingular position.
Dimensions: shell length 76 (72-78) Ám, width 72-74 Ám, pylome 30x40 Ám, wall 5 Ám.
Emended Diagnosis: Benedek and Sarjeant, 1981, p. 319
Cyst proximate, subglobular to broadly subpolygonal. Epitract in the form of a rounded and trucated cone, crowned by a broad, low apical prominence: hypotract hemispherical. Phragma thick, two-layered; endophragm quite thin, periphragm roughly twelve to fifteen times thicker (total thickness c. 5 Ám) and perforated by an irregular pattern of cavities and canals, sometimes opening to the exterior. Paracingulum well marked by an indentation of the periphragm surface and bordered by narrow ridges; its two ends are only slightly offset. Parasulcus similarly marked and extending for a short distance anterior, and a greater distance posterior, to the paracingulum. Surface of periphragm granulate to finely scabrate. Archaeopyle single-plate precingular, Type P.
Dimensions: Holotype: length 76 Ám, breadth 73 Ám, thickness of wall 5 Ám. Range of Dimensions: Length 72-78 Ám, breadth 72-74 Ám, thickness of wall 5 Ám. Material: 7 specimens.