Seminavis 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 : 130

Seminavis sp. ( Fig. 55 )

Features: length 76–80 μm, width 11–12 μm, striae 18–19 in 10 μm.

Description: Valves slender, semi-lanceolate with slightly concave ventral margin and sub-acute apices. Raphe straight and approximate to ventral margin. Median line wide in the middle and terminate before reaching the apices. Striae weakly radiate in both dorsal and ventral sides.

Ecology and Distribution: Unknown. Rare in Basra corals.

Figures

FIGURES 52–61. Marine benthic diatoms in coral reefs off Basra. Fig. 51. Navicula distans., Fig. 52. Navicula kariana var. frigida, Fig.53. Navicula transistantioides, Fig.54. Navicula sp., Fig. 55.Seminavis sp., Fig.56.Trachyneis antillarum, Fig.57.Trachyneis aspera, Fig. 58. Trachyneis clepsydra, Fig. 59. Trachyneis debyi, Fig. 60. Tracyneis velata, Fig. 61. Donkinia carinata.