Pilosidinium fensomei Courtinat, 1989

Holotype: Courtinat, 1989, pl.21,fig.7
Locus typicus: Mont-Rivel, Jura, France
Stratum typicum: Oxfordian
Translation Courtinat, 1989: LPP

Original diagnosis: Courtinat, 1989, p.191
Subspherical apteate cyst with an autophragm only. The cyst is covered with very delicate conical spines with pointed tips, supported by a hollow basal swelling. The archaeopyle is apical and the accessory sutures are amply developed, indicating 6 preapical paraplates. No single paratabulation element is visible. The adnate operculum is multiplated. Dimensions: cyst diameter 37-48 µm, spine length 204 µm.

Affinities:
Courtinat, 1989, p.191: Fensome (1979) described a form (Sentusidinium sp. E)
from the Upper Oxfordian-Lower Kimmeridgian of Greenland, which presents an identical morphology, spines supported by swellings and adnate operculum. The only difference is that in P. fensomei the swellings are hollow whereas they are solid in Sentusidinium sp. E, looking like granulae.

Poulsen 1996, p. 81
Pilosidinium fensomei Courtinat 1989, Pl. 16, Fig. 16
Remarks. This Sentusidinium-like form has a granular surface. At present it is uncertain whether it represents a separate species, or the endocyst of Dingodinium minutum. In specimens of the latter that have partially lost the periphragm (Pl. 16, Fig. 7), the endocyst resembles P. fensomei.
Recorded occurrences.
Denmark: Glossodinium dimorphum Zone Subzone c-d.
Poland:limovi-Scythicus Zones.