TL;DR: The Ashaka locality in the Upper Benue Trough (northeastern Nigeria) has yielded a small but interesting late Cenomanian assemblage of microremains, including teeth of ''Carcharias'' amonensis, Rhombopterygia zaborskii sp. nov., Hamrabatis sp., ''Stephanodus'' sp., and a possible ionoscopiform as mentioned in this paper.
TL;DR: The complete set of dentition allowed us to support a previous study suggesting that the genus Macropycnodon is a junior synonym of Acrotemnus Agassiz, where the genus is now known from at least four species confined to the Turonian.