Braarudosphaera quinquecostata
Set number: 13
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Set number: 14
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Braarudosphaera quinquecostata Hill, 1976
Braarudosphaera gartneri Wind & Wise in Wise & Wind 1977
In the plan view, this pentalith shows length-slow (+) elongation.
Species of Braarudosphaera are characterised by stellate ridges that radiate outward from the centre and converge at the vertices. This species superficially resembles Braarudosphaera stenorhetha attached to Braarudosphaera regularis, with their apices aligned. The ridge segments are slender and kite-shaped, with a free length approximately twice the joint length.
Worldwide
Hill, M. E. 1976. Lower Cretaceous calcareous nannofossils from Texas and Oklahoma. Palaeontographica Abteilung B Palaeophytologie. 156: 103-179.
Wise, S. W. & Wind, F. H. 1977. Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project 36: 269-491
Holotype
Braarudosphaera quinquecostata
Hill, 1976
Late Albian
Denton Marl, Grayson County, Texas, USA