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Meiourogonyaulax strongyla
Meiourogonyaulax strongylos Sarjeant, 1972
Originally (and now) Meiourogonyaulax, subsequently Lithodinia, thirdly Lithodinia?.
This species was retained in Meiourogonyaulax by Fensome and Williams (2004, p.424) following the retention of the genus by Riding and Helby (2001d, p.81,83). Sarjeant (1972) cited the epithet as "strongylos", the Greek adjective for rounded.
Since Principle 5 of the I.C.N. states that taxon names are to be treated as Latin, this epithet should be rendered as "strongyla", in agreement with the feminine gender of the generic name ("strongylum" would be the neuter form, and "strongylus" the masculine form).
Holotype: Sarjeant, 1972, pl.4, fig.7, text-fig.7
Locus typicus: Jameson Land, Greenland
Stratum typicum: Bathonian
Original diagnosis: Sarjeant, 1972, p.35-37
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).
Originally (and now) Meiourogonyaulax, subsequently Lithodinia, thirdly Lithodinia?.
This species was retained in Meiourogonyaulax by Fensome and Williams (2004, p.424) following the retention of the genus by Riding and Helby (2001d, p.81,83). Sarjeant (1972) cited the epithet as "strongylos", the Greek adjective for rounded.
Since Principle 5 of the I.C.N. states that taxon names are to be treated as Latin, this epithet should be rendered as "strongyla", in agreement with the feminine gender of the generic name ("strongylum" would be the neuter form, and "strongylus" the masculine form).
Holotype: Sarjeant, 1972, pl.4, fig.7, text-fig.7
Locus typicus: Jameson Land, Greenland
Stratum typicum: Bathonian
Original diagnosis: Sarjeant, 1972, p.35-37
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).