New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania named after Helen Coxall

Gartnerago coxalliae

Derivation of name: After Dr. Helen Coxall (Cardiff University), Cenozoic micropalaeontologist on the TDP team.
Diagnosis: A medium-sized species with a rim that is reminiscent of that of Gartnerago (bright outer cycle, dark inner cycle, but lacking a central plate). The wide central area is open and spanned by a complex bar, aligned with the short axis, that remains quite dark in XPL. The bar bifurcates where it joins the rim.
Differentiation: The bars in other species of Gartnerago are of simple construction and do not bifurcate.
Holotype: Pl. 6, figs 36, 37.
Holotype dimensions: L = 7.04μm, W = 4.84μm.
Paratype: Pl. 6, figs 34, 35.
Type locality: TDP5, Machole, south of Kitulo Hill, near Lindi, coastal Tanzania.
Type level: TDP5/10-2, 15-16cm; UC15eTP, Late Campanian.
Occurrence: TDP5 and TDP9, Late Campanian-Early Maastrichtian (UC15eTP-17); Matandu Bridge (Kilwa), Late Campanian (UC15eTP).

Lees, J. A. 2007. New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania; outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15.
Journal of Nannoplankton Research, 29(1): 39-65.


 


 

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