Quadrulella madibai sp. nov. Kosakyan, Lahr, Mulot, Meisterfeld, Mitchell and Lara

Description. Test ovoid or pyriform, slightly elongated, with a rounded posterior end, laterally compressed towards the aperture. Test colourless, composed of square plates, regularly arranged in rows. The plates are smaller near the aperture (5 – 6 µm) then gradually become larger (9 – 11 µm) toward the posterior end of the test. Dimensions (based on five individuals) of the test: L = 83 – 91 µm, B = 37 – 45 µm. Aperture 21 – 23 µm wide, strongly curved and bordered by a thin organic lip.

Differential diagnosis. See diagnosis of Q. symmetrica .

Type locality. Pitse mire, a valley peatland in a landscape of upland grassland in the Welgevonden Game Park adjacent to Marakele national park, South Africa; 24 ° 24 I 29.3 II S; 0 27 ° 48 I 43.8 II E.

Holotype. Fig. 4b.

Etymology. This species was named to honour Nelson Mandela, the South African revolutionary and later president, who was called Madiba by his friends in reference to the name of his clan.