Tryblionella coarctata (Grunow) 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 : 141

Tryblionella coarctata (Grunow) D.G. Mann (in Round et al. 1990: 678) ( Fig. 98 )

References: Krammer & Lange-Bertalot 1988, p. 50, pl. 38, figs 13–15A; Witkowski et al. 2000, p. 374, pl. 183, fig.?13; pl. 186, figs 4–13; as Nitzschia coarctata Grunow (1880: 68) .

Features: Length 30–56 μm, width 9.5–14 μm, striae 10–12 in 10 μm.

Description: Valves linear elliptic with constricted sided and broadly cuneate to sub-apiculate apex. Raphe eccentric, fibulae small, evenly spaced. Transapical striae distinctly punctate, interrupted by longitudinal fold.

Ecology and Distribution: A widespread marine to brackish water species, also found in freshwater. Previously reported in the plankton of Kuwait coasts ( Al-Kandari et al. 2009) and from the Shatt Al-Arab estuary ( Al-Handal 2009). 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.