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Cobertura geogràfica
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17 p.
Resum
Two new genera and species of "nummoloculinas", Planinummoloculina gnosi gen. et sp. nov. and
Nummoloculinodonta akhdarensis gen. et sp. nov., are described from the lower-middle Cenomanian of
Oman. They are compared with other "nummoloculinas" known from the Albian to Maastrichtian of the
Tethys. The mode of coiling, the number of chamber per whorl and the type of the aperture are the main
distinctive criteria to separate them. Planinummoloculina gnosi gen. et sp. nov. seem to be stratigraphically
and geographically very restricted, and shows very low intraspecific morphologic variability.
Nummoloculinodonta akhdarensis gen. et sp. nov. is more widespread both vertically and horizontally, and
shows a higher intraspecific morphologic variability.
Citació
Cretaceous research, vol. 107, núm. 104224 (2020)
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© 2019 Elsevier Ltd.