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Heliodinium
From Williams et al., 2017:
[Heliodinium, Alberti, 1961, p. 33; Emendation: Sarjeant, 1966b, p. 142
Type species: Heliodinium voigtii, Alberti, 1961 (pl.8, fig.2)] ; emend. Sarjeant, 1966
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Original description: [Alberti, 1961]: (Translation: LPP):
Description:
Shell polyedrical, partly rounded, sometimes ovoidal. Dorsoventral flattened. Epitheca slightly larger than Hypocyst or both of equal size. Transverse furrow laevorotatory, slightly indented. Shell tabulate. Pre- and Postcingular plates trapezoidal. Probably 6 preequatorial plates. Longitudinal furrow system present. On plate boundaries crests from which dagger-like processes arise.
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Emended description:
Sarjeant, 1966:
Description:
Proximo-chorate dinoflagellate cysts, spheroidal, ovoidal or subpolygonal in shape, with tabulation ?3`, ?oa, 6``, ?oc, 6```, ?op, 1````. Sutures faintly marked by ridges or low crests, from which arise flattened, dagger to ribbonlike, very flexible processes; processes typically simple, bifurcate or multi-furcate. Cingulum strongly or weakly helicoid, bounded by low crests; sulcus less well marked. Shell surface smooth, granular or punctate. Precingular archaeopyle formed by loss of plate 3``.
[Heliodinium, Alberti, 1961, p. 33; Emendation: Sarjeant, 1966b, p. 142
Type species: Heliodinium voigtii, Alberti, 1961 (pl.8, fig.2)] ; emend. Sarjeant, 1966
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Original description: [Alberti, 1961]: (Translation: LPP):
Description:
Shell polyedrical, partly rounded, sometimes ovoidal. Dorsoventral flattened. Epitheca slightly larger than Hypocyst or both of equal size. Transverse furrow laevorotatory, slightly indented. Shell tabulate. Pre- and Postcingular plates trapezoidal. Probably 6 preequatorial plates. Longitudinal furrow system present. On plate boundaries crests from which dagger-like processes arise.
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Emended description:
Sarjeant, 1966:
Description:
Proximo-chorate dinoflagellate cysts, spheroidal, ovoidal or subpolygonal in shape, with tabulation ?3`, ?oa, 6``, ?oc, 6```, ?op, 1````. Sutures faintly marked by ridges or low crests, from which arise flattened, dagger to ribbonlike, very flexible processes; processes typically simple, bifurcate or multi-furcate. Cingulum strongly or weakly helicoid, bounded by low crests; sulcus less well marked. Shell surface smooth, granular or punctate. Precingular archaeopyle formed by loss of plate 3``.