Gomphoneis minuscula 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 : 20

Gomphoneis minuscula Kociolek & Kulikovskiy , sp. nov. ( Figs 328–334 )

Valves small, linear-clavate, with poles rounded. Length 8–16 µm, breadth 2–3 µm. Axial area narrow, expanded laterally to form a rectangular central area with one shortened stria on either side. 4 isolated stigmoids present, indistinct. Raphe barely lateral, with external proximal raphe ends dilated slightly. The raphe extends straight on to the mantle at both poles. Striae costate, individual areolae not resolved with LM. Striae radiate at the center, become parallel to slightly convergent at the headpole, radiate at the footpole. Striae 17–19/ 10 µm. Small septa and pseudosepta present at the poles. Apical pore fields difficult to distinguish at the footpole.

Type:— RUSSIA: Lake Baikal , Middle Island , Ohlon Gate, 1998, Darwin Initiative sample ( COLO slide for Station 8, number 8.1, holotype designated here (= Fig. 333 ); IBIW slide no. Station 8, number 8.1m, isotype) .

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.