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Hystrichosphaeridium spinipansatum
From Fensome et al., 2019:
Hystrichosphaeridium spinipansatum (Merrill, 1895, p.17; text-fig.20) Sarjeant, 1964b, p.175. Holotype: Merrill, 1895, text-fig.20. Originally Geodia? (Appendix A), subsequently Hystrichosphaeridium, thirdly (and now) Hystrichosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.56) as a problematic species. Age: Early Cretaceous.
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Original description (Merrill, 1895)
Geodia? spinipansata, n. sp. Outline perfect. Body egg-shaped and ornamented in a most peculiar way. The significance of the two apparent openings on top is not understood. Spines irregular in length and size, and variously divided at the terminations. Size: diameter, 0.092 mm.; average length of spine, 0.0307 mm. This peculiar form was not found figured, but from its spiny form I placed it with Geodia, and suggest the specific name spinipansata.
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Sarjeant, 1964b:
Hystrichosphaeridium spinipansatum (Merrill, 1895, p.17; text-fig.20) Sarjeant, 1964b, p.175. Holotype: Merrill, 1895, text-fig.20. Originally Geodia? (Appendix A), subsequently Hystrichosphaeridium, thirdly (and now) Hystrichosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.56) as a problematic species. Age: Early Cretaceous.
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Original description (Merrill, 1895)
Geodia? spinipansata, n. sp. Outline perfect. Body egg-shaped and ornamented in a most peculiar way. The significance of the two apparent openings on top is not understood. Spines irregular in length and size, and variously divided at the terminations. Size: diameter, 0.092 mm.; average length of spine, 0.0307 mm. This peculiar form was not found figured, but from its spiny form I placed it with Geodia, and suggest the specific name spinipansata.
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Sarjeant, 1964b: