Diploneis gemmatula (Grunow) Cleve (1894: 103)

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 : 124

Diploneis gemmatula (Grunow) Cleve (1894: 103) ( Fig. 38 )

References: Hustedt 1931 –1959, p. 527, fig. 1038; Desikachary 1988, pl. 570, figs 1–6,8; Witkowski et al. 2000, p. 187, pl. 91, fig. 14.

Features: Length 90–110 μm, width 30–38 μm, striae 5 in 10 μm.

Description: Valves linear-elliptical, slightly constricted at the center, with rounded apices. Raphe branches straight, ending centrally in simple pores. Central nodule small and transapically dilated. Axial area large, longitudinal canals linear and narrow. Transapical striae parallel at the center, radiate near the apices.

Ecology and Distribution: widely distributed marine species particularly in tropical and subtropical waters, less common in temperate regions. Previously reported from the Gulf ( Al-Kandari et al. 2009). Frequent in Basra corals.

Figures

FIGURES 38–51. Marine benthic diatoms in coral reefs off Basra. Fig. 38. Diploneis gemmatula, Fig. 39. Diploneis nitescens, Fig. 40. Diploneis smithii, Figs 41, 42. Diploneis weissflogii, Fig, 43. Diploneis sp., Fig. 44. Navicula arenaria, Fig. 45. Navicula cancellata, Figs 46–48. Navicula carinifera, Fig. 49. Navicula cf. cincta, Fig. 50. Navicula directa, Fig. 51. Navicula distans.