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Algidasphaeridium
From Williams et al., 2017:
[Algidasphaeridium, Matsuoka and Bujak, 1988, p. 35-36
Type species: Algidasphaeridium capillatum, Matsuoka and Bujak, 1988 (pl.2, fig.5)]
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Original descripition: [Matsuoka and Bujak, 1988]:
Descripition:
Sphaerical skolochorate cysts consisting of a granular periphragm and endophragm, covered with numerous solid spines with closed distal tips. Apical and antapical horns absent. No ornamentation representing paratabulation. Archaeopyle chasmic (slit like).
Affinities:
Algidasphaeridium resembles an acritarchous genus Mycrhistidium, but differs from the latter in possessing a chasmic archaeopyle and a cyst wall consisting of two layers.
[Algidasphaeridium, Matsuoka and Bujak, 1988, p. 35-36
Type species: Algidasphaeridium capillatum, Matsuoka and Bujak, 1988 (pl.2, fig.5)]
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Original descripition: [Matsuoka and Bujak, 1988]:
Descripition:
Sphaerical skolochorate cysts consisting of a granular periphragm and endophragm, covered with numerous solid spines with closed distal tips. Apical and antapical horns absent. No ornamentation representing paratabulation. Archaeopyle chasmic (slit like).
Affinities:
Algidasphaeridium resembles an acritarchous genus Mycrhistidium, but differs from the latter in possessing a chasmic archaeopyle and a cyst wall consisting of two layers.