Wrevittia cassidata

cassidata (Eisenack and Cookson, 1960, p.3, pl.1, figs.5-6) Helenes and Lucas-Clark, 1997, p.188.  Emendations: Sarjeant, 1966b, p.125, as Gonyaulacysta cassidata; Helenes and Lucas-Clark, 1997, p.190, as Wrevittia cassidata.  Holotype: Eisenack and Cookson, 1960, pl.1, fig.5; Jan du Chêne et al., 1986a, pl.40, figs.6-7.  Originally Gonyaulax helicoidea subsp. cassidata, subsequently Gonyaulax cassidata, thirdly Gonyaulacysta cassidata, fourthly (and now) Wrevittia cassidata.  Age: Aptian-Cenomanian.

Parent: Wrevittia