Braarudosphaera quinquecostata

Classification: Mesozoic -> Braarudosphaerales -> Braarudosphaeraceae -> Braarudosphaera -> Braarudosphaera quinquecostata
Sister taxa: B. amputans, B. batilliformis, B. bigelowii, B. pseudobatilliformis, B. turbinea, B. wendlerae, B. stenorhetha, B. africana, B. hockwoldensis, B. primula, B. regularis, B. quinquecostata, B. sp.,

Distinguishing features: Braarudosphaera with sutural ridges on the pentaliths


Citation: Braarudosphaera quinquecostata Hill, 1976
Rank: Species
Synonyms: Braarudosphaera gartneri Wind & Wise 1977 in Wise & Wind 1977 - the two species were described at the same time from Albian sediments and are virtually identical [my interpretation - JRY 2015]
Notes & discussion: Lambert (1986) argued that B. quinquecostata was a morphotype of B. africana, representing forms with minimal cone development.  

Farinacci & Howe catalog pages: Braarudosphaera quinquecostata * , Braarudosphaera gartneri *

Distinguishing features: Braarudosphaera with sutural ridges on the pentaliths

Search data:
TagsLITHS: nannolith-radiate, pentagonal, CA: closed,
CSPH: equant, monomorphic, T-UNITS: T-prominent,
MetricsLith size: 6->13µm; Segments: 5->5;
Sources: original descriptions
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Albian Stage (100.50-112.95Ma, top in Albian stage). Data source: Hill, 1976 (original description)
First occurrence (base): within Albian Stage (100.50-112.95Ma, base in Albian stage). Data source: Hill, 1976 (original description)

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Braarudosphaera


    Hill, M. E. (1976). Lower Cretaceous calcareous nannofossils from Texas and Oklahoma. Palaeontographica Abteilung B. 156: 103-179. gs :: ::

    Lambert, B. (1986). La notion d'espèce chez le genre Braarudosphaera Deflandre, 1947: mythe et réalité. Revue de Micropaleontologie. 28(4): 255-264. gs :: ::

    Lambert, B. (1987). Nannofossiles calcaires de l'Albien supérieur et du Vraconnien du Cameroun méridional. Cahiers de Micropaléontologie. 2(2): 33-60. gs :: ::

    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): -. gs :: view :: open


    Braarudosphaera quinquecostata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-7-2020

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    Short stable page link: Go to to create a permanent copy of this page - citation notes

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