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Shublikodinium verrucosum
Shubikodinium verrucosum Wiggins, 1973
Tax. jr. synonym of Rhaetogonyaulax arctica (Wiggins, 1973) Stover and Evitt, 1978, according to Stover and Evitt, 1978.
Holotype: Wiggins, 1973, pl.3, fig.3
Locus typicus: North Slope of Alaska
Stratum typicum: Late Triassic
Original diagnosis: Wiggins, 1973, p.5
Same as for the genus with the following additional description, The cyst wall of this variety is covered with a verrucate ornamentation which is very similar to that noted on S. verrucosum, The outer wall pattern of ornamentation is embossed, and only a couple of fragmental hypotracts were encountered with this type of outer wall surface. This embossed pattern appears to be superimposed on, and not coincident with, the normal sutural tabulation pattern of the hypotract. Also, it superficially gives an appearance of fewer, raised hypotractal plates, with wide depressions in between. Some specimens of S. verrucosum (plate 4, figure 1) trend toward this condition with a slightly embossed wall feature covering more than one hypotractal plate. Dimensions: Holotype: over-all length 44 µm over-all width 44 µm transverse furrow width approximately 5-6 µm.
Tax. jr. synonym of Rhaetogonyaulax arctica (Wiggins, 1973) Stover and Evitt, 1978, according to Stover and Evitt, 1978.
Holotype: Wiggins, 1973, pl.3, fig.3
Locus typicus: North Slope of Alaska
Stratum typicum: Late Triassic
Original diagnosis: Wiggins, 1973, p.5
Same as for the genus with the following additional description, The cyst wall of this variety is covered with a verrucate ornamentation which is very similar to that noted on S. verrucosum, The outer wall pattern of ornamentation is embossed, and only a couple of fragmental hypotracts were encountered with this type of outer wall surface. This embossed pattern appears to be superimposed on, and not coincident with, the normal sutural tabulation pattern of the hypotract. Also, it superficially gives an appearance of fewer, raised hypotractal plates, with wide depressions in between. Some specimens of S. verrucosum (plate 4, figure 1) trend toward this condition with a slightly embossed wall feature covering more than one hypotractal plate. Dimensions: Holotype: over-all length 44 µm over-all width 44 µm transverse furrow width approximately 5-6 µm.