Abstract

Radulopecten Rollier, 1911 was a common bivalve genus in the Middle–Late Jurassic seas of the northern Central Neotethys. The present work offers measurements of the species diversity dynamics of this genus after reconsideration of the species names and the related corrections of their stratigraphic ranges. Information from four large domains of the northern Central Neotethys is employed. It is established that Radulopecten included seven species and evolved during the Bathonian–Tithonian interval in this region. The total number of species peaked in the Callovian, after which it declined. Globally, this genus had a slightly wider stratigraphic range (Bajocian–Tithonian), and its species diversity peaked in the Oxfordian. The regional diversity dynamics of Radulopecten may reflect some global regularities of changes in the species number modified by specific regional paleoenvironmental changes.

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