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Tubotuberella whatleyi
Tubotuberella whatleyi (Sarjeant, 1972) Stover and Evitt, 1978
Originally Gonyaulacysta, subsequently (and now) Tubotuberella.
Holotype: Sarjeant, 1972, pl.7, fig.1; text-fig.4; Jan du Chêne, 1986, pl.124, figs.10-11
Locus typicus: Upper Vardekloft Formation, Jameson Land, Greenland
Stratum typicum: Bathonian-Middle Callovian
Original diagnosis: Sarjeant, 1972, p.19-21: Gonyaulacysta whatleyi
Cyst delicate and transparent, Ambitus a rounded and elongate pentagon. Endophragm and periphragm in general contact, but separating at either pole- at the apex is a "horn" or small apical pericoel, in the form of a rounded-tipped cone with thickened base, and at the antapex an antapical pericoel in the form a truncated cone, Tabulation marked by low ridges on the periphragm; 5", 1a, 6", 5(or 6?)c, 6""", 1p, 1pv, ?1"""", Cingulum markedly laevorotatory, its two ends differing in anteroposterior position by almost 3 times its breadth. Archaeopyle precingular, reduced, formed by loss of plate 3".
Dimensions: Holotype: overall length 78.5 µm, length of apical "horn" 8.5 µm, length of antapical pericoel 8 µm, length of endoblast 62 µm, overall breadth 39 µm. Range of dimensions (4 specimens were measurable) overall length 66.5 - 88.5 µm (mean 80.66 µm), overall breadth c. 37 - 42 µm (mean 39.66 µm), length of endoblast 51 - 60.5 µm (mean 57.16 µm).
Originally Gonyaulacysta, subsequently (and now) Tubotuberella.
Holotype: Sarjeant, 1972, pl.7, fig.1; text-fig.4; Jan du Chêne, 1986, pl.124, figs.10-11
Locus typicus: Upper Vardekloft Formation, Jameson Land, Greenland
Stratum typicum: Bathonian-Middle Callovian
Original diagnosis: Sarjeant, 1972, p.19-21: Gonyaulacysta whatleyi
Cyst delicate and transparent, Ambitus a rounded and elongate pentagon. Endophragm and periphragm in general contact, but separating at either pole- at the apex is a "horn" or small apical pericoel, in the form of a rounded-tipped cone with thickened base, and at the antapex an antapical pericoel in the form a truncated cone, Tabulation marked by low ridges on the periphragm; 5", 1a, 6", 5(or 6?)c, 6""", 1p, 1pv, ?1"""", Cingulum markedly laevorotatory, its two ends differing in anteroposterior position by almost 3 times its breadth. Archaeopyle precingular, reduced, formed by loss of plate 3".
Dimensions: Holotype: overall length 78.5 µm, length of apical "horn" 8.5 µm, length of antapical pericoel 8 µm, length of endoblast 62 µm, overall breadth 39 µm. Range of dimensions (4 specimens were measurable) overall length 66.5 - 88.5 µm (mean 80.66 µm), overall breadth c. 37 - 42 µm (mean 39.66 µm), length of endoblast 51 - 60.5 µm (mean 57.16 µm).