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Shublikodinium dilatatum
Shubikodinium dilatatum Wiggins, 1973
Now Rhaetogonyaulax. Originally Shublikodinium, subsequently (and now) Rhaetogonyaulax.
Tax. sr. synonym of Shublikodinium echinoverrucatum Wiggins, 1973, Shublikodinium granulatum Wiggins, 1973 and Shublikodinium scaberrimum Wiggins, 1973, all according to Stover and Evitt, 1978.
Holotype: Wiggins, 1973, pl.5, fig.3
Locus typicus: North Slope of Alaska
Stratum typicum: Late Tithonian
Original diagnosis: Wiggins, 1973, p.6
Same as for the genus with the following additional description, The cyst wall of this species is characteristically covered with granulate to verrucate ornamentation of variable intensity. This ornamentation is similar to that occurring on S. verrucosum . However, S. diIatatum has a distinctly innated cyst outline, and a shallow, almost unnotched, transverse furrow. The second antapical horn is weakly represented and could easily remain unobserved with a slight cyst rotation. Epitract characteristics are unknown. Dimensions: Holotype- overall length 56 µm; over-all width 56 µm, transverse furrow width approximately 10 µm.
Now Rhaetogonyaulax. Originally Shublikodinium, subsequently (and now) Rhaetogonyaulax.
Tax. sr. synonym of Shublikodinium echinoverrucatum Wiggins, 1973, Shublikodinium granulatum Wiggins, 1973 and Shublikodinium scaberrimum Wiggins, 1973, all according to Stover and Evitt, 1978.
Holotype: Wiggins, 1973, pl.5, fig.3
Locus typicus: North Slope of Alaska
Stratum typicum: Late Tithonian
Original diagnosis: Wiggins, 1973, p.6
Same as for the genus with the following additional description, The cyst wall of this species is characteristically covered with granulate to verrucate ornamentation of variable intensity. This ornamentation is similar to that occurring on S. verrucosum . However, S. diIatatum has a distinctly innated cyst outline, and a shallow, almost unnotched, transverse furrow. The second antapical horn is weakly represented and could easily remain unobserved with a slight cyst rotation. Epitract characteristics are unknown. Dimensions: Holotype- overall length 56 µm; over-all width 56 µm, transverse furrow width approximately 10 µm.