Psammodictyon panduriforme (W. Gregory) 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 : 139

Psammodictyon panduriforme (W. Gregory) D.G. Mann (in Round et al. 1990: 676) ( Fig. 97 )

References: Witkowski et al. 2000, p. 397, pl. 184, figs 13, 14, pl. 186, figs 1–3; Lobban et al. 2012, p. 304, pl. 62, figs 3,4. As Nitzschia panduriformis Gregory (1857: 529)

Features: Length 90–110 μm, width 22–30 μm, fibulae 7–9 in 10 μm, striae 14–16 in 10 μm.

Description: valves linear elliptic, constricted in the middle, with broadly cuneate apices. Raphe eccentric, fibulae evenly spaced. Valve face with longitudinal, hyaline, laterally spaced fold which interrupt transapical striae.

Remarks: This species is characterized by having an undulating valve surface and a hyaline strip void of puncta, normally more close to the keel margin.

Ecology and Distribution: Widely distributed marine species. Previously reported from various parts of the Gulf ( Hendey 1970, Simonsen 1974, Al-Handal 2009, Al-Yamani & Saburova 2011). Frequent in Basra corals.

Figures

FIGURES 91–102. Marine benthic diatoms in coral reefs off Basra. Fig. 91. Nitzschia behrei, Fig. 92. Nitzschia distans, Fig. 93. Nitzschia fluminensis, Fig. 94. Nitzschia lorenziana, Fig. 95. Nitzschia sigma, Fig. 96. Nitzschia sp., 97. Pssamodictyon panduriformis Fig. 98. Tryblionella coarctata, Fig. 99. Tryblionella didyma, Fig. 100. Tryblionella nicobarica, Fig., Fig. 101. Amphiprora sulcata, Fig. 102. Auricula intermedia.