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Cleistosphaeridium fungosum
From Fensome et al., 2019:
Cleistosphaeridium fungosus, Harding, 1990b, p.43–44, pl.25, figs.1–9. Holotype: Harding, 1990b, pl.25, fig.1. Name not validly published: lodgement of holotype not specified (ICN Article 40.7). Originally Cleistosphaeridium (name not validly published), subsequently Sentusidinium. Taxonomic senior synonym: Sentusidinium aptiense, according to Wood et al. (2016, p.82). Age: early Barremian.
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Original description: [Harding, 1990, p.43]:
Diagnosis:
Shape: Ambitus subspherical. Even distribution of equidimensional tubiform processes. Epicyst and hypocyst not differentiated. No dorso-ventral compression.
Phragma: Autophragm ca. 0.5 µm thick, distally covered in densely packed filamentous fibres up to 1 µm long and 0.2 µm in diameter. Numerous solid, tubiform processes (?periphragm) up to 4 µm long are evenly distributed over the cyst surface in an apparently non-tabular fashion. The processes flare slightly distally and may have a central perforation at the end.
Paratabulation: Epicystal paratabulation identified from the accessory archaeopyle sutures: 4", 6", + ai. Hypocystal paratabulation unknown.
Archaeopyle: Type (tA), involving four apicals as free, simple, polyplacoid operculum. Accessory archaeopyle sutures formed between the precingular paraplate series.
Paracingulum: Undifferentiated.
Parasulcus: Undifferentiated.
Dimensions:
Diameter (45) 37.8 (32) µm. Process length (5) 3 (2) µm.
Cleistosphaeridium fungosus, Harding, 1990b, p.43–44, pl.25, figs.1–9. Holotype: Harding, 1990b, pl.25, fig.1. Name not validly published: lodgement of holotype not specified (ICN Article 40.7). Originally Cleistosphaeridium (name not validly published), subsequently Sentusidinium. Taxonomic senior synonym: Sentusidinium aptiense, according to Wood et al. (2016, p.82). Age: early Barremian.
---------------------------------------------------------------------------------------------------
Original description: [Harding, 1990, p.43]:
Diagnosis:
Shape: Ambitus subspherical. Even distribution of equidimensional tubiform processes. Epicyst and hypocyst not differentiated. No dorso-ventral compression.
Phragma: Autophragm ca. 0.5 µm thick, distally covered in densely packed filamentous fibres up to 1 µm long and 0.2 µm in diameter. Numerous solid, tubiform processes (?periphragm) up to 4 µm long are evenly distributed over the cyst surface in an apparently non-tabular fashion. The processes flare slightly distally and may have a central perforation at the end.
Paratabulation: Epicystal paratabulation identified from the accessory archaeopyle sutures: 4", 6", + ai. Hypocystal paratabulation unknown.
Archaeopyle: Type (tA), involving four apicals as free, simple, polyplacoid operculum. Accessory archaeopyle sutures formed between the precingular paraplate series.
Paracingulum: Undifferentiated.
Parasulcus: Undifferentiated.
Dimensions:
Diameter (45) 37.8 (32) µm. Process length (5) 3 (2) µm.