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Messelodinium
From Williams et al., 2017:
[Messelodinium, Lenz et al., 2007, p. 122, 124.
Type species: Messelodinium thielepfeifferae, Lenz et al., 2007 (pl.1, figs.1–2)]
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Original description [Lenz et al., 2007]:
Diagnosis:
Proximate peridinioid dinoflagellate cysts, acavate, shape subspherical to elongate ellipsoidal, occasionally with an apical peak, but lacking distinct apical or antapical horns; wall thin, autophragm only, parasutural features lacking. Paratabulation indicated by archeopyle, paracingulum and parasulcus. Intercalary archeopyle type I (2a).
Affinities:
Messelodinium gen. nov. differs from Geiselodinium Krutzsch 1962 in being acavate, having a thin autophragm only, and in lacking apical and antapical horns. The lack of horns also distinguishes Messelodinium gen. nov. from the acavate genera Kalyptea Cookson & Eisenack 1960 and Liasidium Drugg 1978.
[Messelodinium, Lenz et al., 2007, p. 122, 124.
Type species: Messelodinium thielepfeifferae, Lenz et al., 2007 (pl.1, figs.1–2)]
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Original description [Lenz et al., 2007]:
Diagnosis:
Proximate peridinioid dinoflagellate cysts, acavate, shape subspherical to elongate ellipsoidal, occasionally with an apical peak, but lacking distinct apical or antapical horns; wall thin, autophragm only, parasutural features lacking. Paratabulation indicated by archeopyle, paracingulum and parasulcus. Intercalary archeopyle type I (2a).
Affinities:
Messelodinium gen. nov. differs from Geiselodinium Krutzsch 1962 in being acavate, having a thin autophragm only, and in lacking apical and antapical horns. The lack of horns also distinguishes Messelodinium gen. nov. from the acavate genera Kalyptea Cookson & Eisenack 1960 and Liasidium Drugg 1978.