Marine benthic diatoms in the newly discovered coral reefs, off Basra coast, Southern Iraq Author Al-Handal, Adil Y. Department of Biological and Environmental Sciences, University of Gothenburg, Sweden Author Thomas, Evan W. Biology Department, Waubonsee Community College, Sugar Grove, Illinois, USA Author Pennesi, Chiara Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italia text Phytotaxa 2018 2018-10-12 372 2 111 152 http://dx.doi.org/10.11646/phytotaxa.372.2.1 journal article 10.11646/phytotaxa.372.2.1 1179-3163 13728822 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.