Dissiliodinium hocneratum (Fenton et al., 1980) Lentin and Williams, 1993

Originally Gongylodinium, subsequently Dissiliodinium, thirdly (and now) Dissiliodinium?. Questionable assignment: Feist-Burkhardt and Monteil (2001, p.64).

Holotype: Fenton et al., 1980, pl.16, fig.2
Locus typicus: Hook Norton, Oxfordshire England
Stratum typicum: Late Bajocian

Original diagnosis: Fenton et al., 1980, p. 159: Gongylodinium hocneratum
Proximate, non-tabulate cyst, ovoidal or rarely spheroidal in outline. Paracingulum and parasulcus absent or indistinct. Archaeopyle precingular, by loss of two equidimensional dorsal precingular paraplates. Wall thin, smooth to scabrate.

Original description: Fenton et al., 1980, p. 159: Gongylodinium hocneratum
The cyst is normally ovoidal, rarely becoming spheroidal. The wall is thin, 1 Ám or less, and varies from smooth to scabrate. The paracingulum and parasulcus are normally absent, but may occasionally be indicated on the ventral surface by a reduction in ornament or the presence of a shallow depression. The opercular paraplates are trapezoidal in outline, and during excystment may fall inside the autocoel. A small protrusion on the anterial archeopyle margin may indicate an intercalary paraplate. The frequent absence of this plate causes a small notch to be present on the anterior margin.
Dimensions. Cyst width 52(62)78 Ám (17 specimens), length 53(62)73 Ám; holotype width 61 Ám, length 62 Ám.

Affinities:
Fenton et al., 1980, p. 159: Gongylodinium hocneratum
G. hocneratum differs from G. erymnoteichos in lacking strong ornament, having a thinner wall, and being more ovoidal in outline.