Stauroneis sp.

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 : 133

Stauroneis sp. ( Fig. 66 )

Features: Length 84–88 μm, width 13–14 μm, striae 20–22 in 10 μm.

Description: Valves linear lanceolate with rounded apices. Raphe straight, axial area linear and narrow, central area in a form of fascia not reaching valve margin. Striae 20–22 in 10 μm, weakly radiate in the middle, becoming parallel near apices.

Remarks: This species looks similar to Stauroneis dubitabilis Hustedt (1959: 789) but having larger size, less dense striae and fascia not reaching valve margin.

Ecology and Distribution: Unknown. Rare in Basra corals.

Figures

FIGURES 62–74. Marine benthic diatoms in coral reefs off Basra.Fig. 62. Pleurosigma diverse-striatum, Fig. 63. Pleurosigma strigosum, Figs 64, 65. Plagiotropis lepidoptera, Fig. 66. Stauroneis sp., Fig. 67. Amphora arcuata, Fig. 68. Amphora arenaria, Fig. 69. Amphora cf. commutata, Fig. 70. Amphora cingulata, Fig. 71. Halamphora coffeaeformis, Fig. 72. Halamphora costata, Figs 73,74. Amphora graeffeana.