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Muraticysta
From Williams et al., 2017:
[Muraticysta, Head et al., 1989b, p. 458.
Type species: Muraticysta microornata, Head, 1989b (pl.5, figs.1–3, 5)]
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Original description: [Head et al., 1989]:
Diagnosis:
Cysts proximate to proximochorate, spherical to ovoidal. Cyst wall composed of two closely appressed layers: a thin solid endophragm and a thicker periphragm of radiating, thin, delicate, nontabular muri, which arise from a reticulate base. Other projections are absent.
Archeopyle precingular.
Affinities:
Filisphaera Bujak, 1984 has a periphragm composed of "radiating fibers" (Bujak, 1984, p. 185), compared to the thick, finely reticulate periphragm of Muraticysta. Cerebrocysta Bujak in Bujak et al., 1980 emend. Stover and Williams, 1987 differs by being autophragmal and having low, discontinuous, sinuous ridges, rather than a reticulate network of narrow crests. Tectatodinium Wall, 1967 differs in having an outer wall that we interpret as mainly cancellous to fibroid, in which the structure is generally not radially aligned.
[Muraticysta, Head et al., 1989b, p. 458.
Type species: Muraticysta microornata, Head, 1989b (pl.5, figs.1–3, 5)]
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Original description: [Head et al., 1989]:
Diagnosis:
Cysts proximate to proximochorate, spherical to ovoidal. Cyst wall composed of two closely appressed layers: a thin solid endophragm and a thicker periphragm of radiating, thin, delicate, nontabular muri, which arise from a reticulate base. Other projections are absent.
Archeopyle precingular.
Affinities:
Filisphaera Bujak, 1984 has a periphragm composed of "radiating fibers" (Bujak, 1984, p. 185), compared to the thick, finely reticulate periphragm of Muraticysta. Cerebrocysta Bujak in Bujak et al., 1980 emend. Stover and Williams, 1987 differs by being autophragmal and having low, discontinuous, sinuous ridges, rather than a reticulate network of narrow crests. Tectatodinium Wall, 1967 differs in having an outer wall that we interpret as mainly cancellous to fibroid, in which the structure is generally not radially aligned.