From Williams et al., 2017:

[Spicadinium, Batten and Lister, 1988, p. 357
Acritarch genus.

Type species: Spicadinium akidoton, Batten and Lister, 1988 (figs.5j–k)]

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Original description: [Batten and Lister, 1988]:

Diagnosis:
Skolochorate cyst, subpolygonal to ovoid in shape. Phragma thin, bearing numerous, narrow, solid, simple processes, the distribution of which may be weakly linked to paratabulation, this is otherwise not evident.
Archeopyle type uncertain but excystment aperture demonstrated by rupturing of epicyst.