Alisogymnium euclaense, (Cookson and Eisenack, 1970), Lentin and Vozzhennikova, 1990

Holotype: Cookson and Eisenack, 1970, pl.10, fig.12; Lentin and Vozzhennikova, 1990, Appendix A, fig.35
Locus typicus: Madura No. 1 Bore, Eucla Basin, W Australia
Stratum typicum: Senonian

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Original description as Dinogymnium euclaensis: [Cookson and Eisenack, 1970, p. 139]:

Description:
Shell small, consisting of a conical, longitudinally striated epitheca and a smooth hypotheca about three-quarters of a sphere in outline. The two portions are separated by a rather deep, circular, transverse girdle, the ends of which form a longitudinal furrow which extends downwards for varying distances but not to the antapex.

Dimensions:
Holotype, c. 34 µm long, c. 22 µm wide.
Range of 14 specimens: 32-42 µm long, 19-30 µm broad.

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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.

Alisogymnium euclaense (Cookson and Eisenack, 1970a) Lentin and Vozzhennikova, 1990. According to Cookson and Eisenack (1970), this species has a striate episome and a smooth hyposome. The antapex is always rounded.
Length: 32-42 µm, breadth 19-30 µm.