Gomphoneis subrussica 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 : 22

Gomphoneis subrussica Kociolek & Kulikovskiy , sp. nov. ( Figs 360–364 )

Valves lanceolate-clavate, with apical broadly rounded. Length 29–41 µm, breadth 7–9 µm. Axial area very narrow, expanded slightly to form a smallish, irregularly-shaped central area that does not extend to the margin. 2–3 shortened striae occur on either side of the central area and are slightly more coarsely arranged than other striae. Stigmoids wanting. Raphe lateral, undulate, with external proximal ends rounded and external distal ends deflected onto the valve mantle. Costate striae radiate, except at the headpole where they become nearly parallel. Striae 10–13/ 10 µm. Septa and pseudosepta present at the poles. Apical pore fields evident, composed of distinct rows of porelli.

Type:— RUSSIA: Lake Baikal , Cape Khoboj, stones and algae, 1998, Darwin Initiative sample ( COLO slide for Station 9, number 9, holotype designated here (= Fig. 364 ); IBIW slide no. Station 9, number 9m, isotype) .

Figures

PLATE 9: LM. Figs 353–359: Gomphoneis russica sp. nov. Fig. 353 is of the holotype. Figs 360–364: G. subrussica sp. nov. Fig. 364 is of the holotype. Figs 365–367: G. impressa sp. nov. Fig. 366 is of the holotype. Scale bar = 10 for all figures.