Upper Cretaceous planktonic and benthic foraminifer from Costa Rica, a good recognition?

Valentin Chesnel @Valentin-Chesnel

16 August 2023 1 4K Report

Hi everyone.

As I am not a foraminifera specialist, and quite new in studying upper Cretaceous deposits, I have a question for you.

I "recognized" in these 4 pictures:

- Rugoglobigerina rugosa

- Planoglobulina sp.

- Heterohelix sp.

Scale is 100 microns

I am right?

(sorry for the bad preservation)

Theta Lubliner

After looking at some refence photos (as I did not have these species for my masters) I'm happy with Rugoglobigerina rugosa for the first two specimens.

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