Coscinodiscus marginatus Ehrenberg (1843: 412) (Fig. 9) References: Hendey 1964, p. 78, pl. 22, fig.2; Desikachary 1988, pl. 537, figs 1–4, pl. 538, figs 1–6. Features: Diameter 41–70 μm. Description: Valves circular, convex with large hexagonal areolae arranged in quincunx structure. Marginal areolae smaller in size, central area absent. Valve margin broad. Remarks: Deposited from the plankton. Ecology and Distribution: A widely distributed pelagic species. Previously reported from the Gulf (Al-Kandari et al. 2009). Frequent in Basra corals.

Published as part of Al-Handal, Adil Y., Thomas, Evan W. & Pennesi, Chiara, 2018, Marine benthic diatoms in the newly discovered coral reefs, off Basra coast, Southern Iraq, pp. 111-152 in Phytotaxa 372 (2) on page 116, DOI: 10.11646/phytotaxa.372.2.1, http://zenodo.org/record/13728822