Luticola

Chattová, Barbora, Lebouvier, Marc, Haan, Myriam De & Vijver, Bart Van De, 2017, The genus Luticola (Bacillariophyta) on Ile Amsterdam and Ile Saint-Paul (Southern Indian Ocean) with the description of two new species, European Journal of Taxonomy 387, pp. 1-17 : 10-11

Luticola sp.

Figs 72‒82

Description

Light microscopy ( Figs 72–82 )

Valves linear-lanceolate to elliptic-lanceolate in smaller specimens, with rounded, non-protracted apices. Valve dimensions (n = 12): length 10.7‒20.5 µm, width 4.5‒6.5 µm. Axial area narrow, linear. Central area wide, bow-tie shaped, clearly asymmetrical with the side bearing the isolated pore markedly wider. Isolated pore present in the central area, located halfway between the valve centre and margin. Raphe branches straight, deflected away from the isolated pore at both proximal and distal ends. Transapical striae punctate, radiate throughout the entire valve, 20‒24 in 10 µm.

Remarks

So far, this species has only been observed with light microscopy. Further studies and SEM observations will be necessary to determine its correct taxonomic position. The species was so far found in only two soil samples (A6 and A7) taken from Ile Saint-Paul. Both samples are dominated by L. beyensii ,

Humidophila brekkaensis , Pinnularia acidicola Van de Vijver & Le Cohu (Van de Vijver et al. 2002a) and Hantzschia amphioxys .

Figures

Figs 72–82. Luticola sp. Light micrographs of a population from Ile Saint-Paul. Scalebar: 10 μm.