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Hystrichosphaeropsis nuda
Hystrichosphaeropsis nuda (O. Wetzel, 1961) Sarjeant, 1985
Originally Triblastula, subsequently Hystrichosphaeropsis.
Questionable tax. jr. synonym of Hystrichosphaeropsis quasicribrata (O. Wetzel, 1961) Gocht, 1976, according to Gocht, 1976, and Stover and Evitt, 1978. Marheinecke, 1992, accepted this synonymy without comment.
Holotype: O. Wetzel, 1961, pl.2, fig.2
Locus typicus: Baltic Cretaceous flintstones
Stratum typicum: Erratic, ?Late Cretaceous
Original diagnosis: O. Wetzel, 1961, p.340: Triblastula nuda
Central portion spheroidal, smooth, without spines. Usually only one of the "pole-caps" has a terminal point (apex); the other is more cuboidal or cylindrical, narrowing somewhat at the end. The caps often have four longitudinal striations, which may indicate the corners of the broad areas or fields of the shell. The circular bases of the two caps together appear as a narrow pair of parallel lines, and may represent the equatorial "girdle" of a true dinoflagellate. "Pylomes" are apparently not rare.
Dimensions: 96x48 Ám; 100x45 Ám.
Originally Triblastula, subsequently Hystrichosphaeropsis.
Questionable tax. jr. synonym of Hystrichosphaeropsis quasicribrata (O. Wetzel, 1961) Gocht, 1976, according to Gocht, 1976, and Stover and Evitt, 1978. Marheinecke, 1992, accepted this synonymy without comment.
Holotype: O. Wetzel, 1961, pl.2, fig.2
Locus typicus: Baltic Cretaceous flintstones
Stratum typicum: Erratic, ?Late Cretaceous
Original diagnosis: O. Wetzel, 1961, p.340: Triblastula nuda
Central portion spheroidal, smooth, without spines. Usually only one of the "pole-caps" has a terminal point (apex); the other is more cuboidal or cylindrical, narrowing somewhat at the end. The caps often have four longitudinal striations, which may indicate the corners of the broad areas or fields of the shell. The circular bases of the two caps together appear as a narrow pair of parallel lines, and may represent the equatorial "girdle" of a true dinoflagellate. "Pylomes" are apparently not rare.
Dimensions: 96x48 Ám; 100x45 Ám.