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Cyclonephelium expansum
Cyclonephelium? expansum Corradini, 1973
Stover and Evitt, 1978, considered this to be a problematical species of Cyclonephelium.
Marheinecke, 1992, questionably included this species in Cyclonephelium. Now Glaphyrocysta.
Holotype: Corradini, 1973, pl.24, figs.8a-b
Paratype: Corradini, 1973
Locus typicus: Solignano, Parma, Italy
Stratum typicum: Late Cretaceous-Paleocene
Original diagnosis: Corradini, 1973, p. 161
Ovoidal central body having granular surface and bilcbated antapex. Wide membrane supported by simple processes, tapering distally. Transversnl furrow sometimes present on the dorsal surface Archeopyle apical with zig-zag margins.
Dimensions--Holotype: diameter of the central body 70X54 µm (apical calotte absent), width of the membrane 38-60 µm, length of the processes 25-35 µm. Range: diameter of the central body 58-(68)-78x50-(58)-68 µm, width of the rnembran 25-(50)-68 µm, length of the processes 20-(28)-34 µm.
Original description: Corradini, 1973, p. 162
The two antapical lobes are normally well evident. Periphragm in form of a wide, delicate membrane which is continuous and supported by simple thin processes. These taper gradually from the base to the apex where they become lost in the same membrane. This lamellar wing becomes thick outward and forms a more or less continuous ring, the margin of which is sometimes turned over distally. The processes and membrans start from the circumpherential one and turn gradually toward the ventral surface. Parallel and low crests occurring on dorsal surface suggest the presence of a transversal furrow. Archeopyle apical having a zig-zag margin with quite evident sulcal notch.
Affinities:
Corradini, 1973, p. 162: C. expansum is distinguished from C. castelcasiense by the more wide membrane, its granular central body and the lack of distal connections between the processes.
Stover and Evitt, 1978, considered this to be a problematical species of Cyclonephelium.
Marheinecke, 1992, questionably included this species in Cyclonephelium. Now Glaphyrocysta.
Holotype: Corradini, 1973, pl.24, figs.8a-b
Paratype: Corradini, 1973
Locus typicus: Solignano, Parma, Italy
Stratum typicum: Late Cretaceous-Paleocene
Original diagnosis: Corradini, 1973, p. 161
Ovoidal central body having granular surface and bilcbated antapex. Wide membrane supported by simple processes, tapering distally. Transversnl furrow sometimes present on the dorsal surface Archeopyle apical with zig-zag margins.
Dimensions--Holotype: diameter of the central body 70X54 µm (apical calotte absent), width of the membrane 38-60 µm, length of the processes 25-35 µm. Range: diameter of the central body 58-(68)-78x50-(58)-68 µm, width of the rnembran 25-(50)-68 µm, length of the processes 20-(28)-34 µm.
Original description: Corradini, 1973, p. 162
The two antapical lobes are normally well evident. Periphragm in form of a wide, delicate membrane which is continuous and supported by simple thin processes. These taper gradually from the base to the apex where they become lost in the same membrane. This lamellar wing becomes thick outward and forms a more or less continuous ring, the margin of which is sometimes turned over distally. The processes and membrans start from the circumpherential one and turn gradually toward the ventral surface. Parallel and low crests occurring on dorsal surface suggest the presence of a transversal furrow. Archeopyle apical having a zig-zag margin with quite evident sulcal notch.
Affinities:
Corradini, 1973, p. 162: C. expansum is distinguished from C. castelcasiense by the more wide membrane, its granular central body and the lack of distal connections between the processes.