Fallacia nummularia (Greville) 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 : 123

Fallacia nummularia (Greville) D.G. Mann in Round et al. (1990: 669) ( Fig. 30 )

References: Hustedt 1961–66, p. 527, fig. 1566 (as Navicula nummularia Greville 1859: 249 ); Witkowski et al., 2000, p. 209, pl. 71, figs 10, 11.

Features: Length 20–36 μm, width 12–20 μm, striae 14–15 in 10 μm.

Description: Valves broadly elliptical with rounded apices. Raphe fissures almost straight with transapical dilated central area connected with the narrow hyaline lateral sterna. Transapical striae parallel at the center and radiate near the apices.

Ecology and Distribution: A marine species most commonly found in warm waters. 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.