Praecalcigonellum polymorphum subsp. tenue
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subsp. tenue (Keupp, 1980a, p.131-132, pl.16, figs.2-6) Lentin and Williams, 1993, p.538. Holotype: Keupp, 1980a, pl.16, figs.2-3. Originally Calcigonellum polymorphum subsp. tenue, subsequently (and now) Praecalcigonellum polymorphum subsp. tenue. Age: Late Aptian. Parent: Praecalcigonellum polymorphum