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Lithodinia strongyla
Lithodinia "?strongyla" (Sarjeant, 1972, p.35-37, pl.4, fig.7; text-fig.7) Gocht, 1976, p.334.
NOW Meiourogonyaulax. Originally (and now) Meiourogonyaulax, subsequently Lithodinia, thirdly Lithodinia?. Questionable assignment: Williams et al. (1993, p.56). For etymology, see Meiourogonyaulax strongyla.
Holotype: Sarjeant, 1972, pl.4, fig.7; text-fig.7.
Age: Bathonian.
Original diagnosis: Sarjeant, 1972, p.35-37: Meiourogonyaulax strongylos
Cyst spheroidal or very broadly ovoidal, with apex consistently lost in archaeopyle formation Tabulation- ?", 6", 0a, 7c, 7""", 2p, 1"""" plate boundaries are clearly demarcated by raised ridges bearing low denticles. The cingulum is narrow and forms a weakly laevo-rotatory spiral whose two ends scarcely differ in anteroposterior position. At its more anterior end, a small square plate is present (here numbered 1c) the other cingular plates are of more constant size. The sulcus is narrow: two plates (here numbered 1p and 2p) meet to separate it from the antapex. The first and seventh postcingular plates are reduced in size.
Dimensions: Holotype: length 65 µm, breadth 75 µm. Range- length 54 to 74 µm (mean 63.3 µm). Breadth 67 to 78 µm (mean 71.5 µm).
NOW Meiourogonyaulax. Originally (and now) Meiourogonyaulax, subsequently Lithodinia, thirdly Lithodinia?. Questionable assignment: Williams et al. (1993, p.56). For etymology, see Meiourogonyaulax strongyla.
Holotype: Sarjeant, 1972, pl.4, fig.7; text-fig.7.
Age: Bathonian.
Original diagnosis: Sarjeant, 1972, p.35-37: Meiourogonyaulax strongylos
Cyst spheroidal or very broadly ovoidal, with apex consistently lost in archaeopyle formation Tabulation- ?", 6", 0a, 7c, 7""", 2p, 1"""" plate boundaries are clearly demarcated by raised ridges bearing low denticles. The cingulum is narrow and forms a weakly laevo-rotatory spiral whose two ends scarcely differ in anteroposterior position. At its more anterior end, a small square plate is present (here numbered 1c) the other cingular plates are of more constant size. The sulcus is narrow: two plates (here numbered 1p and 2p) meet to separate it from the antapex. The first and seventh postcingular plates are reduced in size.
Dimensions: Holotype: length 65 µm, breadth 75 µm. Range- length 54 to 74 µm (mean 63.3 µm). Breadth 67 to 78 µm (mean 71.5 µm).