Isabelidinium spinosissimum

"spinosissimum" (Cookson and Eisenack, 1970a, p.141, pl.11, figs.5-6) Lentin and Williams, 1977a, p.168.  Holotype: Cookson and Eisenack, 1970a, pl.11, fig.5.  NOW Eucladinium.  Originally Deflandrea, subsequently Isabelia (combination illegitimate), thirdly Isabelidinium, fourthly (and now) Eucladinium (combination illegitimate).  Age: Senonian.

Parent: Isabelidinium