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Hystrichosphaerina turonica
From Fensome et al., 2019:
Hystrichosphaerina turonica Alberti, 1961, p.39, pl.10, figs.4a–b. Holotype: Alberti, 1961, pl.10, figs.4a–b. Originally (and now) Hystrichosphaerina, subsequently Systematophora, thirdly Polystephanephorus. Stancliffe and Sarjeant (1990,
p.204) retained this species in Hystrichosphaerina. Age: Turonian.
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Original description: [Alberti, 1961] (translated from German):
Hystrichosphaerina turonica n.sp.
Plate 10 Figs. 4a and 4b
Holotype: The specimen preserved in specimen no. Pi 17c/3 and shown on Plate 10 Figs. 4a and 4b.
Typical location: Borehole Pirna.
Typical stratum: Turon.
Diagnosis: Shell approximately ovoid. With 14 to 16 radially arranged, roughly cup-shaped appendages, the walls of which are perforated like a net. The oval or polygonal meshes vary in size; rarely, they extend from the base to the upper edge of the "cup," which widens considerably upwards. No connecting strands exist between the ends of the appendages.
Notes: The cross-section of the cup-shaped appendages can be oval, occasionally almost rectangular. These always widen upwards. The shell membrane is slightly granulated. At times, some of the "cups" are so close together that they appear to merge into one another. The species resembles Cannosphaeropsis umaformis Cookson, but it has connecting strands between the ends of the appendages, which could not be observed in H. turonica n. sp.
Dimensions of the holotype: Diameter of the shell D1 58 μ, D2 71 μ. Total diameter Gd1 86 μ, Gd2 103 μ. The length of the appendages varies between 16 and 19 μ, their width at the base between 19 and 22 μ, and at the upper edge between 28 and 36 μ.
Material: 2 specimens.
Occurrence: Turonian of the Pirna borehole (Lower Marl).
Hystrichosphaerina turonica Alberti, 1961, p.39, pl.10, figs.4a–b. Holotype: Alberti, 1961, pl.10, figs.4a–b. Originally (and now) Hystrichosphaerina, subsequently Systematophora, thirdly Polystephanephorus. Stancliffe and Sarjeant (1990,
p.204) retained this species in Hystrichosphaerina. Age: Turonian.
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Original description: [Alberti, 1961] (translated from German):
Hystrichosphaerina turonica n.sp.
Plate 10 Figs. 4a and 4b
Holotype: The specimen preserved in specimen no. Pi 17c/3 and shown on Plate 10 Figs. 4a and 4b.
Typical location: Borehole Pirna.
Typical stratum: Turon.
Diagnosis: Shell approximately ovoid. With 14 to 16 radially arranged, roughly cup-shaped appendages, the walls of which are perforated like a net. The oval or polygonal meshes vary in size; rarely, they extend from the base to the upper edge of the "cup," which widens considerably upwards. No connecting strands exist between the ends of the appendages.
Notes: The cross-section of the cup-shaped appendages can be oval, occasionally almost rectangular. These always widen upwards. The shell membrane is slightly granulated. At times, some of the "cups" are so close together that they appear to merge into one another. The species resembles Cannosphaeropsis umaformis Cookson, but it has connecting strands between the ends of the appendages, which could not be observed in H. turonica n. sp.
Dimensions of the holotype: Diameter of the shell D1 58 μ, D2 71 μ. Total diameter Gd1 86 μ, Gd2 103 μ. The length of the appendages varies between 16 and 19 μ, their width at the base between 19 and 22 μ, and at the upper edge between 28 and 36 μ.
Material: 2 specimens.
Occurrence: Turonian of the Pirna borehole (Lower Marl).