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Craspedodinium pergamentaceum
Craspedodinium pergamentaceum (Burger, 1980) Mehrotra and Sarjeant, 1984
Now Leberidocysta?. Originally Palaeostomocystis, subsequently (and now) Leberidocysta?, thirdly Craspedodinium.
Lentin and Williams, 1985, questionably retained this species in Leberidocysta
Stover and Evitt, 1978.
Holotype: Burger, 1980, pl.47, fig.3
Age: Aptian
Original description (Burger, 1980)
Holotype: BMR Roma 1, depth 30.9 m (101 ft 6 in); Bungil Formation, Minmi Member. Cretaceous, early Aptian (MFP 4322-1, 422/1148; CPC 16471. Pl. 47, fig. 3).
Description: Shell in the form of an oval to spherical sac, with a small aperture (pylome?) at one end. In some specimens an operculum is still attached. Wall very probably single-layered, thin, psilate to punctate, usually folded, with a minutely and densely wrinkled, almost corrugate surface.
Dimensions: Length of sac (= apical diameter) of 19 specimens 52-(63)-82 µm.
Distribution: An uncommon species in many marine iJSsemblages from the Surat Basin.
Comments: P. pergamentaceus sp. nov. differs from other species of Palaeostomocystis by its extremely thin, and characteristically wrinkled wall. The presence of an inner membrane, indicating that the species would be cavate, was suggested in only a few species but not confirmed in most others. If an endophragm is present, the species will probably have to be transferred to the genus Hexagonifera.
Now Leberidocysta?. Originally Palaeostomocystis, subsequently (and now) Leberidocysta?, thirdly Craspedodinium.
Lentin and Williams, 1985, questionably retained this species in Leberidocysta
Stover and Evitt, 1978.
Holotype: Burger, 1980, pl.47, fig.3
Age: Aptian
Original description (Burger, 1980)
Holotype: BMR Roma 1, depth 30.9 m (101 ft 6 in); Bungil Formation, Minmi Member. Cretaceous, early Aptian (MFP 4322-1, 422/1148; CPC 16471. Pl. 47, fig. 3).
Description: Shell in the form of an oval to spherical sac, with a small aperture (pylome?) at one end. In some specimens an operculum is still attached. Wall very probably single-layered, thin, psilate to punctate, usually folded, with a minutely and densely wrinkled, almost corrugate surface.
Dimensions: Length of sac (= apical diameter) of 19 specimens 52-(63)-82 µm.
Distribution: An uncommon species in many marine iJSsemblages from the Surat Basin.
Comments: P. pergamentaceus sp. nov. differs from other species of Palaeostomocystis by its extremely thin, and characteristically wrinkled wall. The presence of an inner membrane, indicating that the species would be cavate, was suggested in only a few species but not confirmed in most others. If an endophragm is present, the species will probably have to be transferred to the genus Hexagonifera.