Olifantiella mascarenica C.Riaux-Gobin & Compere

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 mascarenica C.Riaux-Gobin & Compere

Fig. 4G-J

Description.

Valves linear with capitate apices, 6.4-11.8 μm in length, 2.0-2.3 μm in width and with 41-55 striae in 10 μm. Buciniportula complex, internally with a single raised tubular process. A single shortened stria is present near the valve margin on the side of the buciniportula. Apical slits narrower than macroareola. Girdle bands with two rows of perforations (ca. 110 pores in 10 μm). Externally proximal raphe endings straight and tear-drop-shaped, distal raphe endings slightly bent towards buciniportula site. Narrow longitudinal channels visible internally along the valve margin.

Distribution.

Newly observed from coastal waters of Sulawesi and Bawean Islands (samples SZCZ 28814 and SZCZ 27652). Originally reported from Rodrigues Island, also observed in Moorea Island ( Riaux-Gobin 2015) and coast of Turkey ( Kaleli 2022).

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).