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Mathurosphaera
From Williams et al., 2017:
[Mathurosphaera, Varma and Dangwal, 1964, p. 70
Acritarch genus. Not a dinoflagellate, according to Stover and Evitt, 1978.
Type species: Mathurosphaera rajivii, Varma and Dangwal, 1964 (pl.2, figs.11–12)]
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Original description: [Varma and Dangwal, 1964]:
Diagnosis:
Body usually spherical, covered with rounded to angular (mostly pentagonal or hexagonal) fields without raised marginal ledges; processes originating freely from all over the body.
Affinities:
This genus is peculiar in having pentagonal to hexagonal fields all over the body like Hystrichosphera but without any girdle-like structure, and at the same time being studded with very fine, simple, hairlike, solid processes. It shows resemblance to another genus, Cymatiosphera Wetzel, as emended by Deflandre, in having a spherical, granulated body, and in having the external surface divided into polygonal fields, but differs remarkably in not having these polygonal fields bordered by raised ledges (the most characteristic feature of the new genus) and in having numerous, small, solid, hairlike, translucent processes arising from all over the body. The peculiar combination of processes, which are characteristically present in the family Hystrichosphaeridae, and the pentagonal to hexagonal fields, comparable to those of Cymatiosphaera, belonging to the family Pterospermopsidae, provide the genus with a distinctive position. But the paucity of individuals and species stands in the way of giving at present any clear-cut family affinities of this genus.
[Mathurosphaera, Varma and Dangwal, 1964, p. 70
Acritarch genus. Not a dinoflagellate, according to Stover and Evitt, 1978.
Type species: Mathurosphaera rajivii, Varma and Dangwal, 1964 (pl.2, figs.11–12)]
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Original description: [Varma and Dangwal, 1964]:
Diagnosis:
Body usually spherical, covered with rounded to angular (mostly pentagonal or hexagonal) fields without raised marginal ledges; processes originating freely from all over the body.
Affinities:
This genus is peculiar in having pentagonal to hexagonal fields all over the body like Hystrichosphera but without any girdle-like structure, and at the same time being studded with very fine, simple, hairlike, solid processes. It shows resemblance to another genus, Cymatiosphera Wetzel, as emended by Deflandre, in having a spherical, granulated body, and in having the external surface divided into polygonal fields, but differs remarkably in not having these polygonal fields bordered by raised ledges (the most characteristic feature of the new genus) and in having numerous, small, solid, hairlike, translucent processes arising from all over the body. The peculiar combination of processes, which are characteristically present in the family Hystrichosphaeridae, and the pentagonal to hexagonal fields, comparable to those of Cymatiosphaera, belonging to the family Pterospermopsidae, provide the genus with a distinctive position. But the paucity of individuals and species stands in the way of giving at present any clear-cut family affinities of this genus.