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Tubulifera
From Williams et al., 2017:
[Tubulifera, Schumacker-Lambry, 1978, p. 52-52
Acritarch genus, according to Schumacker-Lambry, 1978, and Fensome et al., 1990.
Type species: Tubulifera heterosolenia, Schumacker-Lambry, 1978 (pl.8, fig.6)]
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Original description: [Schumacker-Lambry, 1978]: (Translation: Stover and Williams, 1987, p. 221):
Description:
Cysts(?) with a spherical to ovoidal central body; wall formed of two appressed layers except at the sites of processes which are formed by the external layer only; processes more or less numerous, tubiform, not in communication with the central body cavity, and open or closed at their distal extremities; no trace of paratabulation, of a parasulcus or of a paracingulum.
[Tubulifera, Schumacker-Lambry, 1978, p. 52-52
Acritarch genus, according to Schumacker-Lambry, 1978, and Fensome et al., 1990.
Type species: Tubulifera heterosolenia, Schumacker-Lambry, 1978 (pl.8, fig.6)]
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Original description: [Schumacker-Lambry, 1978]: (Translation: Stover and Williams, 1987, p. 221):
Description:
Cysts(?) with a spherical to ovoidal central body; wall formed of two appressed layers except at the sites of processes which are formed by the external layer only; processes more or less numerous, tubiform, not in communication with the central body cavity, and open or closed at their distal extremities; no trace of paratabulation, of a parasulcus or of a paracingulum.