Berkeleya rutilans (Trentepohl ex Roth) Grunow, 1880

Al-Handal, Adil Y., Compère, Pierre & Criobe-Usr, Catherine Riaux-Gobin, 2016, Marine benthic diatoms in the coral reefs of Reunion and Rodrigues Islands, West Indian Ocean, Micronesica 2016 (3), pp. 1-78 : 24-25

Berkeleya rutilans (Trentepohl ex Roth) Grunow (Pl. 14, Fig. 5)

Features: Apical axis: 13-15 µm, transapical axis: 2-3 µm, striae 48 in 10 µm. Valves linear to linear-lanceolate with round apices. Axial area narrow, central area linear and narrow. Raphe branches short, terminal raphe endings terminate at a distance from the apices and appear as deflected inwards. Proximal raphe endings round and slightly deflected on one direction, well distant from each other. The first rows of striae bordering the central area composed of single, elongated areolae which have a round ending near the axial area and terminate in narrow linear slitlike endings toward the valve margin. Rest of the areolae are roundish.

Occurrence: Rare in Reunion Island.

Berkeleya sp. (Pl. 14, Fig. 4) Features: Valves linear lanceolate with broadly round apices, 15-20 µm long, 4-5 µm wide. Axial area narrow, central area small and nearly round. Raphe branches straight with terminal endings shortly hooked before reaching the apices. Striae uniseriate, formed of roundish to slightly elongate areolae, 30-32 in 10 µm. Striae slightly radiate at the centre of the valve, becoming parallel towards apices.

Occurrence: Rare in Reunion Island.