Gomphoneis lange-bertalotii Kociolek & Kulikovskiy, 2013

Kociolek, John P., Kulikovskiy, Maxim S. & Solak, Cüneyt N., 2013, The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia, Phytotaxa 154 (1), pp. 1-37 : 13

Gomphoneis lange-bertalotii Kociolek & Kulikovskiy , sp. nov. ( Figs 153–158 )

Valves lanceolate-clavate with rounded apices. Length 21–42 µm, breadth 5–7 µm. Axial area linear, expanded to form x-shaped to rectangular (to somewhat circular) central area. 4 isolated stigmoids positioned around the central area. Raphe is lateral, barely undulate. The external proximal raphe ends dilated. Costate striae strongly radiate near the center of the valve and towards the footpole, becoming parallel towards the headpole. Striae 11–13/ 10 µm. Apical pore field bilobed, comprised of distinct rows of porelli. Septa and pseudosepta small at both poles.

Type:— RUSSIA: Lake Baikal , Kapustinskaya bay, N52 o 38.484, E107 o 23.218, 17.07.2011, leg. M. Kulikovskiy ( IBIW slide no. 18580m, holotype designated here (= Fig. 155 ), COLO slide no. 18580p, SZCZ slide no. 18580a, isotypes) .

Etymology:— Named in honor of our friend and colleague, Prof. Dr. Horst Lange-Bertalot (Frankfurt).

Figures

PLATE 6: LM. Figs 120–127: Gomphoneis tumidoides sp. nov. Fig. 120 is of the holotype. Figs 128–131: G. rotundata sp. nov. Fig. 129 is of the holotype. Figs 132–143: G. gracilis sp. nov. Fig. 142 is of the holotype. Figs. 144–152: G. sp. cf. witkowskii. Figs 153– 158: G. lange-bertalotii sp. nov. Fig. 155 is of the holotype. Figs 159–168: G. witkowskii sp. nov. Fig. 168 is of the holotype. Scale bar = 10 µm for all figures.