Calcigonellum polymorphum subsp. tenue
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"subsp. tenue" Keupp, 1980a, p.131–132, pl.16, figs.2–6. Holotype: Keupp, 1980a, pl.16, figs.2–3. NOW Praecalcigonellum polymorphum subsp. tenue. Originally Calcigonellum polymorphum subsp. tenue, subsequently (and now) Praecalcigonellum polymorphum subsp. tenue. Age: Aptian (late Clansayesian).
Parent: Calcigonellum polymorphum