Biremis ambigua (Cleve) D.G. Mann

Al-Handal, Adil Y., Thomas, Evan W. & Pennesi, Chiara, 2018, Marine benthic diatoms in the newly discovered coral reefs, off Basra coast, Southern Iraq, Phytotaxa 372 (2), pp. 111-152 : 122

Biremis ambigua (Cleve) D.G. Mann in Round et al. (1990: 664) ( Fig. 28 )

References: Witkowski et al., 2000, p. 158, pl. 155, figs 2–6; Hein et al., 2008, p. 47, pl.20, fig. 9; pl. 21, fig. 6.

Features: Length: 42–60 μm, width: 6–8 μm, striae 12–14 in 10 μm.

Description: Valves linear with rounded apices. Raphe-sternum large with slightly undulate raphe fissures. Central area undistinguished. Transapical striae coarse, parallel and developed in the outer zone of the valve.

Remarks: Examined specimens possess slightly higher striae density (normally 8–11 in 10 μm).

Ecology and Distribution: Widely distributed marine species. Previously reported from the Gulf (Al-Yamani & Saburova 2011). Frequent in Basra corals.

Figures

FIGURES 21–37. Marine benthic diatoms in coral reefs off Basra. Fig. 21. Mastogloia quinquecostata, Fig. 22. Cocconeis latecostata, Fig. 23. Berkeleya scopuloru, Figs 24, 25. Climaconei sp. Fig. 26. Parlibellus rhombiformis, Fig. 27. Parlibellus sp., Fig. 28. Biremis ambigua, Fig. 29. Fallacia forcipata, Fig. 30. Fallacia nummularia, Fig. 31 Fallacia sp., Fig. 32. Progonoia musca, Fig. 33. Caloneis elongata, Fig. 34. Caloneis liber, Fig. 35. Diploneis cf. interrupta, Fig. 36. Diploneis chersonensis, Fig. 37. Diploneis fusca.