Diplotsekouri francisjosephii Varol, 2025
Species of Diplotsekouri are characterised by having a sharply tapering conical wider blade with first-order whitish-grey interference colours in the plan view and a narrow vestigial blade. Diplotsekouri francisjosephii displays parallel extinction (extinction angle is 0°) and exhibits length-fast (-) elongation.
In honour of Francis Joseph Varol, Baildon, Yorkshire, United Kingdom
Length = 6.05 μm; Width of wider blade = 4.95 μm; Width of narrow blade = 0.63 μm
Diplotsekouri francisjosephii differs from Diplotsekouri indianica in having a sharply truncated, wider blade without a terminal ridge.
Varol, O. 2025. A practical guide to optical studies of calcareous nannofossils. Grzybowski Foundation Special Publication. 29: 1-222
Diplotsekouri francisjosephii
Varol, 2025
Early Miocene
DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean