Olifantiella rodriguensis C.Riaux-Gobin, 2012

Rybak, Mateusz, Arsad, Sulastri, Riaux-Gobin, Catherine, Luthfi, Oktiyas Muzaky, Hallegraeff, Gustaaf, Cias, Renata, Kierzek, Agnieszka & Witkowski, Andrzej, 2023, Distribution and morphology of the diatom genus Olifantiella Riaux-Gobin & Compere in Indonesian and Australian waters, including the description of O. gondwanensis sp. nov., PhytoKeys 236, pp. 197-213 : 197

Olifantiella rodriguensis C.Riaux-Gobin

Fig. 4A-F

Description.

Valves linear with capitate apices, 9.0-12.8 μm in length, 2.0-2.3 μm in width and with 41-43 striae in 10 μm. Buciniportula complex, internally with two short raised tubular processes. Two shortened striae are present near the valve margin on the side of the buciniportula. Apical slits narrower than macroareola. Girdle bands with two rows of perforations (ca. 100 perforations in 10 μm). Externally proximal raphe endings straight and tear-drop-shaped, distal raphe endings slightly bent towards buciniportula location. Broad longitudinal channels visible internally along the valve margin.

Distribution.

Newly observed from coastal waters of Sulawesi and Bangka Island (samples SZCZ 28814 and SZCZ 27565). Originally reported from Rodrigues Island and later observed from Galapagos Islands ( Riaux-Gobin and Al-Handal 2012; Riaux-Gobin 2015; Witkowski et al. - unpublished data).

Figures

Figure 4. SEM documentation of Olifantiella rodriguensis (A-F) and Olifantiella mascarenica (G-J) B-J population from Sulawesi Island coast (sample SZCZ 28814) A specimen from Bangka Island (sample SZCZ 27565). Scale bars: 3 µm (E); 2 µm (A-D, H); 1 µm (E, F, I, J).