Navicula cancellata Donkin (1873: 55)

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 : 127

Navicula cancellata Donkin (1873: 55) ( Fig. 45 )

References: Hendey 1964, p. 204, pl. 30, figs 18–20; Witkowski et al. 2000, p. 271, pl. 138, figs 1–3, pl. 144, figs 1–7.

Features: Length 50–60 μm, width 8–10 μm, striae 5–6 in 10 μm.

Description: Valves lanceolate with rounded apices. Raphe branches straight, apical endings hooked to one direction. Axial area narrow, central area asymmetrically dilated. Transapical striae slightly radiate at the center, becoming parallel near the apices.

Ecology and Distribution: A widely distributed marine species. Previously known from the Gulf (Al-Yamani & Saburova 2011). Rare 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.