Gomphoneis baicaliana 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 : 18

Gomphoneis baicaliana Kociolek & Kulikovskiy , sp. nov. ( Figs 283–286 )

Valves broadly lanceolate-clavate, with both apices broadly rounded. Length 35–60 µm, breadth 9–11 µm. Axial area narrow, expanded into irregularly-expanded central area, with 4–5 shortened striae bordering the central area on either side. Stigmoids wanting. Raphe lateral, with dilated external proximal ends. External distal raphe ends deflect onto mantle, curving well before valve terminus. Costate striae radiate near the center of the valve, becoming parallel to slightly convergent towards the ends. Striae 14–17/ 10 µm. Apical pore fields distinct at the footpole. Septa and pseudosepta present, distinct at the footpole.

Type:— RUSSIA: Lake Baikal , Cape Khoboj, stones and algae, 1998, Darwin Initiative sample ( COLO slide for Station 9, number 9, holotype designated here (= Fig. 285 ); IBIW slide no. Station 9, number 9m, isotype) .

Observations:— Distinguished by the larger, proportionately broader valves, and the more broadly rounded apices.

Figures

PLATE 8: LM. Figs 283–286: Gomphoneis baicaliana sp. nov. Fig. 285 is of the holotype. Figs 287–304: G. fourtanierae sp. nov. Fig. 288 is of the holotype. Figs 305–315: G. potapovae sp. nov. Fig. 307 is of the holotype. Figs 316–327: G.strelnikovae sp. nov. Fig. 319 is of the holotype. Figs 328–334: G. minuscula sp. nov. Fig. 333 is of the holotype. Figs 335–352: G. capitata sp. nov. Fig. 336 is of the holotype. Scale bar = 10 µm for all figures.