Journal
HISTORICAL BIOLOGY
Volume 27, Issue 7, Pages 847-860Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/08912963.2014.906410
Keywords
Nummulites; systematic paleontology; Nile Valley (Gebel Mokattam and Qarara); Bahariya Oasis (Garra El Hamra); Qatar (Umm Bab); Middle Eocene; Egypt
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New species Nummulites vetustufabianiin. sp. is described from the El Hamra Formation, Gara El Hamra section Bahariya Oasis Western Desert. The biometrical measurements include maximum and minimum diameter of the successive radii and heights of whorls, length/height ratio, number of chambers and the marginal cord thickness of each whorl for the megalospheric generation as well as the diameter of proloculus were elaborated to differentiate between some allied granulated species such as Nummulites depressus, Nummulites decrouezae, Nummulites cuvillieri and N. vetustufabianiin. sp.Nummulites fabianii group has lateral distribution for the entire Tethys basin, hence such biometrical studies are needed to emphasise the polyphyletic nature of the group.
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