taxonID	type	description	language	source
03BB6E293C26D73AFF4BFF26FCEF0640.taxon	description	LM (Figs 2 – 11): Valves elliptic, ends protracted and capitate. Length 14.0 – 15.6 µm, breadth 5 – 6 µm. Raphe filiform, axial area narrow, central area small and irregularly bordered. One isolated pore near the middle of central nodule, on primary part of valve. Striae weakly radiate, 16 – 17 in 10 µm. SEM, external view (Figs 15, 16, 18): The raphe slit is straight without visible sternum. One isolated pore near central nodule. Central raphe ends straight. Terminal raphe ends deflected towards the secondary side of valve and continue onto mantle. Striae uniseriate throughout. Areolae present as short slits, 65 – 70 in 10 µm of stria. Annulus presents as two rows of larger then in stria areolae, apically elongated. In every row from 3 to 4 apically elongated areolae are present. SEM, internal view (Figs 17, 19): Raphe slit lying in internal sternum. Central raphe endings straight, terminal ends terminate in small helictoglossae. Elongated subpolar areolae (annulus) with warty outgrowths. Internally no hymens or occlusions are observed on the areolae.	en	Kulikovskiy, Maxim, Gusev, Evgeniy, Andreeva, Svetlana, Annenkova, Natalia (2014): Phylogenetic position of the diatom genus Geissleria Lange-Bertalot & Metzeltin and description of two new species from Siberian mountain lakes. Phytotaxa 177 (5): 249-260, DOI: 10.11646/phytotaxa.177.5.1, URL: http://dx.doi.org/10.11646/phytotaxa.177.5.1
03BB6E293C26D73AFF4BFF26FCEF0640.taxon	materials_examined	Type: — RUSSIA: Lake Baikal, pool near Bay, fouling on tree submerged in water, at 8 km from Enkhaluk village, N 52027.042 E 106053.215, 14.07.2011, leg. M. Kulikovskiy (IBIW slide no. 18589 / B 088, holotype designated here (= Fig. 3 )), COLO slide 18589 / B 088 p is isotype.	en	Kulikovskiy, Maxim, Gusev, Evgeniy, Andreeva, Svetlana, Annenkova, Natalia (2014): Phylogenetic position of the diatom genus Geissleria Lange-Bertalot & Metzeltin and description of two new species from Siberian mountain lakes. Phytotaxa 177 (5): 249-260, DOI: 10.11646/phytotaxa.177.5.1, URL: http://dx.doi.org/10.11646/phytotaxa.177.5.1
03BB6E293C26D73AFF4BFF26FCEF0640.taxon	etymology	Etymology: — Epithet refers to the similarity with Geissleria similis (Krasske) Lange-Bertalot & Metzeltin (1996: 68) and the type locality. Observations: This species is very similar to G. similis. However it is easy distinguish this species by both quantitative and qualitative features. G. baicalosimilis sp. nov. has finer striae in 10 µm (16 – 17, not 15) and more finer areolae in 10 µm of stria (65 – 70, not 60) than in G. similis. Striae in the central area of G. similis are long and almost reach central nodule. Additionally, only two elongate pores (one in each stria) at the end of valve present in G. similis. G. baicalosimilis sp. nov. possesses six or more elongated pores.	en	Kulikovskiy, Maxim, Gusev, Evgeniy, Andreeva, Svetlana, Annenkova, Natalia (2014): Phylogenetic position of the diatom genus Geissleria Lange-Bertalot & Metzeltin and description of two new species from Siberian mountain lakes. Phytotaxa 177 (5): 249-260, DOI: 10.11646/phytotaxa.177.5.1, URL: http://dx.doi.org/10.11646/phytotaxa.177.5.1
03BB6E293C26D73AFF4BFB86FD9A05E1.taxon	description	LM (Figs 20 – 35): Valves elliptical to linear-elliptical with ends obtusely rounded. Length 8.0 – 9.5 µm, breadth 5 µm. Raphe filiform. Axial area very narrow, linear. Central area small. Isolated pore lacking. Striae radiate throughout, 18 – 20 in 10 µm. SEM, external view (Fig. 40): The raphe slit is straight with visible sternum. Isolated pore absent. Central raphe ends straight. Terminal raphe ends deflected towards the secondary side of the valve and continue onto mantle. Striae uniseriate or irregularly biseriate near axial area. Annulus structure is not recognizable with striae similar to ones of striae. Areolae present as short slits, 70 in 10 µm of stria length. SEM, internal view (Figs 41, 42): Raphe slit lying in internal sternum. Central raphe endings straight, terminal ends terminate in evident helictoglossae. Elongated subpolar areolae (about 4, two of which are striae) with warty outgrowths. Internally no hymens or occlusions are observed on the areolae.	en	Kulikovskiy, Maxim, Gusev, Evgeniy, Andreeva, Svetlana, Annenkova, Natalia (2014): Phylogenetic position of the diatom genus Geissleria Lange-Bertalot & Metzeltin and description of two new species from Siberian mountain lakes. Phytotaxa 177 (5): 249-260, DOI: 10.11646/phytotaxa.177.5.1, URL: http://dx.doi.org/10.11646/phytotaxa.177.5.1
03BB6E293C26D73AFF4BFB86FD9A05E1.taxon	materials_examined	Type: — RUSSIA: Lake Frolikha, N 55027.005 E 109058.649, 26.07.2012, leg. M. Kulikovskiy (IBIW slide no. 80 / B 369, holotype designated here (= Fig. 20 )), COLO slide 80 / B 369 p is isotype.	en	Kulikovskiy, Maxim, Gusev, Evgeniy, Andreeva, Svetlana, Annenkova, Natalia (2014): Phylogenetic position of the diatom genus Geissleria Lange-Bertalot & Metzeltin and description of two new species from Siberian mountain lakes. Phytotaxa 177 (5): 249-260, DOI: 10.11646/phytotaxa.177.5.1, URL: http://dx.doi.org/10.11646/phytotaxa.177.5.1
03BB6E293C26D73AFF4BFB86FD9A05E1.taxon	etymology	Etymology: — Epithet refers to the type locality. Observations: This species is similar to Geissleria acceptata (Hustedt) Lange-Bertalot & Metzeltin (1996: 64) but differs by rather large valves and more elliptical valves (not linear-elliptical). G. acceptata possesses an isolated pore, a structure that is absent in G. frolikhiensis sp. nov. (Novais et al. 2013). Other similar species are absent from Europe or elsewhere (see Lange-Bertalot 2001, Novais et al. 2013). G. irregularis Kulikovskiy, Lange-Bertalot & Metzeltin (2012: 117) from Lake Baikal differs by asymmetrical valves to the apical axis, central area. No similar species are known from Lake Baikal.	en	Kulikovskiy, Maxim, Gusev, Evgeniy, Andreeva, Svetlana, Annenkova, Natalia (2014): Phylogenetic position of the diatom genus Geissleria Lange-Bertalot & Metzeltin and description of two new species from Siberian mountain lakes. Phytotaxa 177 (5): 249-260, DOI: 10.11646/phytotaxa.177.5.1, URL: http://dx.doi.org/10.11646/phytotaxa.177.5.1
