Dinogymnium cretaceum var. undulacostatum
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"var. undulacostatum" Boltenhagen, 1977, p.68–69, pl.10, figs.1a–c,2a–b,3a–b,4a–b,5a–b. Name not validly published: holotype not designated. Originally Dinogymnium cretaceum var. undulacostatum (name not validly published), subsequently Dinogymnium cretaceum subsp. undulacostatum (combination not validly published). Age: Turonian–Maastrichtian.
Parent: Dinogymnium cretaceum