Speetonia colligata
Set number: 3076
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10µm
Set number: 3075
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10µm
Set number: 3077
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1
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3
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4
10µm
Speetonia colligata Black, 1971a
Speetonia nitida Black, 1971a
Bipodorhabdus roeglii Thierstein, 1971
Large species of Speetonia are composed of a cretarhabdid pelaga surrounding a large central area spanned by a transverse bar that supports a short distal process. The central area lacks additional structure on either side of the transverse bar.
The optical properties are comparable to those of Speetonia.
Black, M. 1971a. Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society 38: 381-424.
Thierstein, H. R., 1971. Tentative Lower Cretaceous Calcareous Nannoplankton Zonation. Eclogae Geologicae Helvetiae 64, 459-488.
Holotype
Speetonia colligata
Black, 1971a
Berriasian
Speeton Clay at Speeton, England