Rhynchodiniopsis hyaloderma
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"?hyaloderma" (Deflandre, 1939b, p.144, pl.6, figs.3-4 ex Sarjeant, 1967b, p.252) Sarjeant, 1982b, p.36. Holotype: Deflandre, 1939b, pl.6, figs.3-4; Jan du Chêne et al., 1986a, pl.58, figs.1-5. NOW Impagidinium?. Originally Palaeoperidinium (name not validly published), subsequently Gonyaulacysta, thirdly Gonyaulacysta?, fourthly Rhynchodiniopsis?, fifthly (and now) Impagidinium?. Questionable assignment: Sarjeant (1982b, p.36). Age: Kimmeridgian.
Parent: Rhynchodiniopsis