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Cristadinium
From Williams et al., 2017:
[Cristadinium, Head et al., 1989b, p. 456
Type species: Cristadinium cristatoserratum, Head et al., 1989b (pl.1, figs.10–11)]
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Original description: [Head et al., 1989]:
Description:
Cyst autophragmal or possibly with closely appressed wall layers, dorso-ventrally compressed, brown, peridinoid outline and having an apical and two antapical horns. Paracingulum planar to weakly helicoidal with margins bearing relatively continuous crests. Relatively continuous parasutural crests are present on the epicyst where they may reflect incompletely paratabulation. No other ornaments occurs on the epicyst. The hypocyst may by without ornamentation or bear crests or/and scattered projections. Wall surface smooth to finely granulate. Archaeopyle presumably hexa-intercalary involving paraplate 2a. Paratabulation probably peridinioid.
[Cristadinium, Head et al., 1989b, p. 456
Type species: Cristadinium cristatoserratum, Head et al., 1989b (pl.1, figs.10–11)]
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Original description: [Head et al., 1989]:
Description:
Cyst autophragmal or possibly with closely appressed wall layers, dorso-ventrally compressed, brown, peridinoid outline and having an apical and two antapical horns. Paracingulum planar to weakly helicoidal with margins bearing relatively continuous crests. Relatively continuous parasutural crests are present on the epicyst where they may reflect incompletely paratabulation. No other ornaments occurs on the epicyst. The hypocyst may by without ornamentation or bear crests or/and scattered projections. Wall surface smooth to finely granulate. Archaeopyle presumably hexa-intercalary involving paraplate 2a. Paratabulation probably peridinioid.