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Kallosphaeridium romaense
Kallosphaeridium? romaense (Burger, 1980a, p.74, pl.27, figs.1–3) Burger, 1980b, p.277.
Originally Membranosphaera, subsequently Kallosphaeridium, thirdly (and now) Kallosphaeridium?.
Jan du Chêne et al., 1985, considered this to be a provisionally accepted species of Kallosphaeridium.
Holotype: Burger, 1980[a], pl.27, fig.3
Age: Aptian
Original description (Burger, 1980a):
Membranosphaera romaensis sp. nov. PI. 27, figs. 1-3
Holotype: BMR Mitchell 10, depth 120.1 m (394 ft); Wallumbilla Formation, Doncaster Member. Cretaceous, late Aptian (MFP 6239-1, 403/1142; CPC 16353. PI. 27, fig. 3).
Description: Cyst spherical to egg-shaped. Archaeopyle, if formed, large, apical, outline circular; margin with notches, including a parasulcal notch, and indicating the presence of 6 precingular paraplates. No other traces of paratabulation are apparent. Wall thin, densely covered with numerous short, tiny spinules 1 µm high.
Dimensions: Apical diameter of 11 undehisced specimens 35-51 (µm, width (13 specimens) 32-52 µm.
Distribution: A rare to relatively common species in many marine assemblages from the Surat Basin.
Comments: The species is smaller than Kallosphaeridium brevibarbatum De Coninck, 1968, and has shorter hairlike spines. It resembles Tenua neophytensa Ioannides & others, 1976, but does not display the prominent apical process of that species.
Originally Membranosphaera, subsequently Kallosphaeridium, thirdly (and now) Kallosphaeridium?.
Jan du Chêne et al., 1985, considered this to be a provisionally accepted species of Kallosphaeridium.
Holotype: Burger, 1980[a], pl.27, fig.3
Age: Aptian
Original description (Burger, 1980a):
Membranosphaera romaensis sp. nov. PI. 27, figs. 1-3
Holotype: BMR Mitchell 10, depth 120.1 m (394 ft); Wallumbilla Formation, Doncaster Member. Cretaceous, late Aptian (MFP 6239-1, 403/1142; CPC 16353. PI. 27, fig. 3).
Description: Cyst spherical to egg-shaped. Archaeopyle, if formed, large, apical, outline circular; margin with notches, including a parasulcal notch, and indicating the presence of 6 precingular paraplates. No other traces of paratabulation are apparent. Wall thin, densely covered with numerous short, tiny spinules 1 µm high.
Dimensions: Apical diameter of 11 undehisced specimens 35-51 (µm, width (13 specimens) 32-52 µm.
Distribution: A rare to relatively common species in many marine assemblages from the Surat Basin.
Comments: The species is smaller than Kallosphaeridium brevibarbatum De Coninck, 1968, and has shorter hairlike spines. It resembles Tenua neophytensa Ioannides & others, 1976, but does not display the prominent apical process of that species.