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Senoniasphaera stagonoides
Senoniasphaera stagonoides (Benedek, 1972) Helenes 1983; Emendation: Benedek and Sarjeant, 1981, p.324, as Ascodinium stagonoides.
Originally Ascodinium, subsequently Deflandrea, thirdly (and now) Senoniasphaera. Benedek and Sarjeant, 1981 emended the diagnosis of this species, as Ascodinium stagonoides Benedek, 1972.
Holotype: Benedek, 1972, pl.2, fig.12, Benedek and Sarjeant, 1981, Fig.3, nos.1,3
Locus typicus: T÷nisberg, Lower Rhine Embayment, Germany
Stratum typicum: Late Oligocene
Translation Benedek, 1972: LPP
Original diagnosis: Benedek, 1972, p.10: Ascodinium stagonoides
An Ascodinium species with dorsoventrally flattened, thick-walled inner wall and smooth outer wall. Apex ends in a wide, long, rounded horn; antapical processes strongly developed and with rounded ends.
Original description: Benedek, 1972, p.11: Ascodinium stagonoides
The thick-walled inner layer is circular to ellipsoidal and connected to the outer layer dorsally and ventrally. The finger-like apical and antapical processes are nearly of same size. Archeopyle results from the loss of the apical part, leaving a zigzag suture. Membrane of the inner wall thick, possibly granular and of yellow-brown color. Outer Membrane relatively thin, pale yellow and transparent.
Dimensions: Capsule 62(65)70 µm, apical horn 13-15 µm, antapical horns 12-20 µm (3 specimens)
Emended Diagnosis: Benedek and Sarjeant, 1981, p. 323: Ascodinium stagonoides
Cyst circumcavate. Periblast very broadly ovoidal to rounded subpolygonal in ambitus, dorsoventrally nattened, with a strong, rounded apical horn and twocomparably strong, rounded antapical horns of almost equal length. Paracingulum laintly marked by ridges and marginal indentation: parasulcus and other paratabulation features not discernible. Endoblast spheroidal to hroadly ovoidal, typically slightly broader than long. Periphragm fairly thin, without ornamentation, sometimes folded; endophragm thicker, granulous. Archaeopyle of combination type, the equivalents of the apical and anterior intercalary plates lifting off as a unit (Type tAtl).
Dimensions: Holotype--length of periblast 79 µm, breadth 70 µm, length of endoblast 60 µm, breadth 68 µm, length of apical horn 10 µm, length of antapical horns 8.5 µm and 10 µm. Range of dimensions: overall length of periblast 76-80 µm (mean 78 µm), breadth 60-76 µm (mean 71 µm), length of endoblast 62-70 µm (mean 65 µm), breadth 58-72 µm (mean 69 µm), length of apical horns 13-15 µm, length of antapical horns 12-20 µm. Material: 3 specimens.
Originally Ascodinium, subsequently Deflandrea, thirdly (and now) Senoniasphaera. Benedek and Sarjeant, 1981 emended the diagnosis of this species, as Ascodinium stagonoides Benedek, 1972.
Holotype: Benedek, 1972, pl.2, fig.12, Benedek and Sarjeant, 1981, Fig.3, nos.1,3
Locus typicus: T÷nisberg, Lower Rhine Embayment, Germany
Stratum typicum: Late Oligocene
Translation Benedek, 1972: LPP
Original diagnosis: Benedek, 1972, p.10: Ascodinium stagonoides
An Ascodinium species with dorsoventrally flattened, thick-walled inner wall and smooth outer wall. Apex ends in a wide, long, rounded horn; antapical processes strongly developed and with rounded ends.
Original description: Benedek, 1972, p.11: Ascodinium stagonoides
The thick-walled inner layer is circular to ellipsoidal and connected to the outer layer dorsally and ventrally. The finger-like apical and antapical processes are nearly of same size. Archeopyle results from the loss of the apical part, leaving a zigzag suture. Membrane of the inner wall thick, possibly granular and of yellow-brown color. Outer Membrane relatively thin, pale yellow and transparent.
Dimensions: Capsule 62(65)70 µm, apical horn 13-15 µm, antapical horns 12-20 µm (3 specimens)
Emended Diagnosis: Benedek and Sarjeant, 1981, p. 323: Ascodinium stagonoides
Cyst circumcavate. Periblast very broadly ovoidal to rounded subpolygonal in ambitus, dorsoventrally nattened, with a strong, rounded apical horn and twocomparably strong, rounded antapical horns of almost equal length. Paracingulum laintly marked by ridges and marginal indentation: parasulcus and other paratabulation features not discernible. Endoblast spheroidal to hroadly ovoidal, typically slightly broader than long. Periphragm fairly thin, without ornamentation, sometimes folded; endophragm thicker, granulous. Archaeopyle of combination type, the equivalents of the apical and anterior intercalary plates lifting off as a unit (Type tAtl).
Dimensions: Holotype--length of periblast 79 µm, breadth 70 µm, length of endoblast 60 µm, breadth 68 µm, length of apical horn 10 µm, length of antapical horns 8.5 µm and 10 µm. Range of dimensions: overall length of periblast 76-80 µm (mean 78 µm), breadth 60-76 µm (mean 71 µm), length of endoblast 62-70 µm (mean 65 µm), breadth 58-72 µm (mean 69 µm), length of apical horns 13-15 µm, length of antapical horns 12-20 µm. Material: 3 specimens.