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Sverdrupiella ornaticingulata
Sverdrupiella ornaticingulata Bujak and Fisher, 1976
Holotype: Bujak and Fisher, 1976, pl.1, fig.8-9; text-fig.2K
Locus typicus: Drake Point F-16, core 3721", Queen Elizabeth Islands, arctic Canada; Stratum typicum: ?Carnian-Norian
Originaldiagnose: Bujak and Fisher, 1976, p.49
Cavate cysts, capsule ovoidal to rhomboidal and occasionally absent. Periphragm biconical and longer than broad with one apical and one or two antapical horns, the second comprising at most a swelling of periphragm. Cingulum rigid, delimited by two crests which typically bear solid or hollow, baculate to clavate, or irregular spines, or are rarely serrate, denticulate, or smooth. Sulcus restricted to hypotract, defined along each of its lateral margins by smooth to undulate crest or by row of spines sometimes proximally united. Remainder of periphragm sometimes also bearing scattered spines. Mode of archeopyle formation problematic, comprising displacement of several plates in periphragm near cingulum and a simple split in capsule.
Dimensions: Holotype, periphragm length 83 µm, periphragm breadth 73 µm, capsule length 33 µm, capsule breadth 45 µm. Observed range, periphragm length 83-106 µm, periphragm breadth 73-88 µm, capsule length 32-50 µm, capsule breadth 37-47 µm.
Holotype: Bujak and Fisher, 1976, pl.1, fig.8-9; text-fig.2K
Locus typicus: Drake Point F-16, core 3721", Queen Elizabeth Islands, arctic Canada; Stratum typicum: ?Carnian-Norian
Originaldiagnose: Bujak and Fisher, 1976, p.49
Cavate cysts, capsule ovoidal to rhomboidal and occasionally absent. Periphragm biconical and longer than broad with one apical and one or two antapical horns, the second comprising at most a swelling of periphragm. Cingulum rigid, delimited by two crests which typically bear solid or hollow, baculate to clavate, or irregular spines, or are rarely serrate, denticulate, or smooth. Sulcus restricted to hypotract, defined along each of its lateral margins by smooth to undulate crest or by row of spines sometimes proximally united. Remainder of periphragm sometimes also bearing scattered spines. Mode of archeopyle formation problematic, comprising displacement of several plates in periphragm near cingulum and a simple split in capsule.
Dimensions: Holotype, periphragm length 83 µm, periphragm breadth 73 µm, capsule length 33 µm, capsule breadth 45 µm. Observed range, periphragm length 83-106 µm, periphragm breadth 73-88 µm, capsule length 32-50 µm, capsule breadth 37-47 µm.