Navicula transistantioides Foged (1975: 44)

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 : 128

Navicula transistantioides Foged (1975: 44) ( Fig. 53 )

References: Witkowski et al. 2000, p. 310, pl. 135, figs 2–6; Foged 1975, p. 44, pl. 19, figs 10, 11.

Features: Length 86–88 μm, width 12–14 μm, striae 11–12 in 10 μm.

Description: Valves lanceolate with apiculate apices. Raphe branches straight, ending centrally in simple pores. Axial area very narrow, central area very small, quadrangular. The coarse transapical striae weakly radiate throughout.

Remarks: Observed specimens showed a slightly smaller number of transapical striae.

Ecology and Distribution: This species has a limited distribution, reported originally from the Indian Ocean ( Foged 1975). Not reported previously from the Gulf. 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.