Back
Sverdrupiella sabinensis
Sverdrupiella sabinensis Bujak and Fisher, 1976
Holotype: Bujak and Fisher, 1976, pl.3, figs.1-2; text-fig.2E
Locus typicus: Hecla J-60, cuttings 3680", Queen Elizabeth Islands, arctic Canada
Stratum typicum: ?Carnian-Norian
Original diagnosis: Bujak and Fisher, 1976, p. 49
Cavate cysts, capsule rhomboidal to ovoidal. Periphragm of almost equal length and breadth and strongly compressed dorso-ventrally. Epitract shorter than hypotract and obtusely triangular in outline with rounded apex and concave sides. Hypotract tapering to rounded, truncated, or rarely pointed antapex. Cingulum circular or laevo-rotatory, defined by two crests bearing verrucae and rounded or acuminate spines. Sulcus delimited on hypotract by two rows of verrucae or short spines united by low crests. Remainder of periphragm bearing relatively sparse covering of verrucae and short, acuminate or rounded spines with occasional longer spines developed, particularly near antapex. Archeopyle formed in periphragm by displacement of two or more, usually three, anterior intercalary plates. Opening in capsule consisting of subapical split. Dimensions: Range: periphragm length: 51-69 µm; periphragm breadth: 53-75 µm; capsule length: 30-45 µm; capsule breadth: 38-56 µm.
Holotype: Bujak and Fisher, 1976, pl.3, figs.1-2; text-fig.2E
Locus typicus: Hecla J-60, cuttings 3680", Queen Elizabeth Islands, arctic Canada
Stratum typicum: ?Carnian-Norian
Original diagnosis: Bujak and Fisher, 1976, p. 49
Cavate cysts, capsule rhomboidal to ovoidal. Periphragm of almost equal length and breadth and strongly compressed dorso-ventrally. Epitract shorter than hypotract and obtusely triangular in outline with rounded apex and concave sides. Hypotract tapering to rounded, truncated, or rarely pointed antapex. Cingulum circular or laevo-rotatory, defined by two crests bearing verrucae and rounded or acuminate spines. Sulcus delimited on hypotract by two rows of verrucae or short spines united by low crests. Remainder of periphragm bearing relatively sparse covering of verrucae and short, acuminate or rounded spines with occasional longer spines developed, particularly near antapex. Archeopyle formed in periphragm by displacement of two or more, usually three, anterior intercalary plates. Opening in capsule consisting of subapical split. Dimensions: Range: periphragm length: 51-69 µm; periphragm breadth: 53-75 µm; capsule length: 30-45 µm; capsule breadth: 38-56 µm.