Braarudosphaera bigelowii

(Gran & Braarud, 1935) Deflandre, 1947 Jun 06, 2019

Braarudosphaera bigelowii, Early Miocene, Mut Basin, Turkey

Inner mold of coccosphere of Braarudosphaera bigelowii, Early Miocene, Mut Basin, Turkey

Set number: 1459

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Braarudosphaera bigelowii, Pleistocene, DSDP Leg 23, Site 229A, Red Sea

Set number: 30

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Braarudosphaera bigelowii, Late Turonian - Early Coniacian, Culver Cliff, Isle of Wight, England

Set number: 31

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Braarudosphaera bigelowii, Middle Campanian, Arabian Peninsula (The specific location cannot be disclosed)

Set number: 28

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Braarudosphaera bigelowii, Middle Campanian, Arabian Peninsula (The specific location cannot be disclosed)

Set number: 32

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Braarudosphaera bigelowii, Late Oligocene, Angola, West Africa

Set number: 33

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Braarudosphaera bigelowii, Late Oligocene, Angola, West Africa

Set number: 29

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Braarudosphaera bigelowii, Late Aptian, Eastern Gulf of Mexico

together with Acinodidemnum

Set number: 1116

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Braarudosphaera bigelowii, Early Paleocene, Kokaksu, Zonguldak, Turkey

coccosphere

Final Epithet

Braarudosphaera bigelowii (Gran & Braarud, 1935) Deflandre, 1947

Basionym

Pontosphaera bigelowii Gran & Braarud, 1935

Synonyms

Braarudosphaera deflandrei Lecal-Schlauder, 1949

Braarudosphaera deflandrei maroccana Lecal-Schlauder, 1951

Optical Properties

In the plan view, Braarudosphaera bigelowii exhibits length-slow (+) elongation.

Remarks

Species of Braarudosphaera with a pentagonal outline consist of trapezoidal segments. In Braarudosphaera bigelowii, the sutures between segments meet the periphery off-centre, whereas in Braarudosphaera regularis Black (1973), the sutures meet the periphery at the midpoint.

References

Black, M. 1973. British Lower Cretaceous Coccoliths. I-Gault Clay (Part 2). Palaeontographical Society Monograph 127: 49-112.

Deflandre, G. 1947a. Braarudosphaera nov. gen., type of a new family of current Coccolithophorids with composite elements. Weekly Proceedings of the Sessions of the Academy of Sciences, Paris. 225: 439-441.

Gran, H. H. & Braarud, T. 1935. A quantitative study of the phytoplankton in the Bay of Fundy and the Gulf of Maine (including observations on hydrography, chemistry and turbidity). Journal of the Biological Board of Canada. 1: 279-467.

Lecal-Schlauder, J. 1949. Notes preliminaires sur les coccolithophorides d'Afrique duNord. Bulletin de la Société d'Histoire Naturelle de l'Afrique du Nord. 4(5-6): 160-167.

Lecal-Schlauder, J. 1951. Recherches morphologiques et biologiques sur les Coccolithophorides Nord-Africains. Annales de l'Institut Océanographique, Monaco & Paris. 26: 255-362

Taxonomy

Braarudosphaera

Biostratigraphy

Stratigraphic Range

Late Barremian - Extant

Age (Ma)

121.75 - 0.00

Holotype

Pontosphaera bigelowii Gran & Braarud, 1935

Meghalayan

Atlantic Ocean