New Hannaea Patrick (Fragilariaceae, Bacillariophyta) species from Asia, with comments on the biogeography of the genus Author Liu, Qi School of Life Science, Shanxi University, Taiyuan 030006 (China) Author Glushchenko, Anton Author Kulikovskiy, Maxim Author Maltsev, Yevhen Institute of Plant Physiology, Russian Academy of Sciences, 127276, Moscow (Russia) Author Kociolek, John Patrick Museum of Natural History and Department of Ecology and Evolutionary Biology University of Colorado, Boulder, Colorado, 80309 (United States) and University of Michigan Biological Station, Pellston, MI 49769 (United States) patrick. kociolek @ colorado. edu kociolek@colorado.edu text Cryptogamie, Bryologie 2019 2019-08-13 20 5 41 61 journal article 10.5252/cryptogamie-algologie2019v40a5 1776-0992 7818966 Hannaea dorofeyukae Kulikovskiy, Glushchenko, Q.Liu & Kociolek , sp. nov. ( Figs 11-14 ) HOLOTYPE . — Slide no 02694; illustrated in Fig. 11C in collection of Maxim Kulikovskiy at the Herbarium of the Institute of Plant Physiology Russian Academy of Science, Moscow , Russia , leg. M.S. Kulikovskiy and E.S. Gusev. TYPE LOCALITY . — Mongolia . Khövsgöl Lake, periphyton, 27.VII.2015 (N50°47.215’, E100°31.837’). ETYMOLOGY. — Species dedicated to Nadezhda Dorofeyuk, renown Russian algologist and specialist of the Mongolian diatom flora. DISTRIBUTION. — Type locality and slides no 02687, 02694, 03097, 03098. DESCRIPTION Valves Arcuate, smoothly tapering to the ends with capitate to rostrate apices, length 45-91 µm, breadth 6-7 µm. Axial area Narrow, linear, expanded at the central area. FIG. 6. — Hannaea pamirensis Glushchenko, Kulikovskiy, Q. Liu & Kociolek , sp. nov. SEM. Internal views. White arrows show the rimoportulae. Scale bars: A, 10 µm; B, F, 2 µm; C-E, 1 µm. FIG. 7. — Hannaea mongolica Glushchenko, Kulikovskiy, Q. Liu & Kociolek , sp. nov. LM, DIC. Valves views. Size diminution series. Type population (slide no 00060). Scale bar: 10 μm. Central area Large, unilaterally expanded and swollen on the concave margin of the valve without ghost striae. Striae parallel, 14-16 in 10 µm. SEM, external views ( Fig. 13 ) Valve face is flat ( Fig. 13A ). Spines are present on some valves ( Fig. 13 B-D). Striae uniseriate or biseriate going from valve face to the mantle. Uniseriate striae present on the side opposite FIG. 8. — Hannaea mongolica Glushchenko, Kulikovskiy, Q. Liu & Kociolek , sp. nov. LM, DIC. Valves views. Size diminution series. Type population (slide no 00060). A , Holotype. Scale bar: 10 μm. from unilaterally-expanded central area ( Fig. 13B, C ). Uniseriate striae also evident in central part of valve near the central area ( Fig. 13C ). Axial area is narrow and evidently broader to the central area. Central area is large, unilaterally-expanded on the ventral side of the valve; ghost striae are wanting ( Fig. 13 A-D). Small round or slit-like openings of rimportue are present on each valve end. Ocellimbi are present on mantle on each valve apex ( Fig. 13E, F ). FIG. 9. — Hannaea mongolica Glushchenko, Kulikovskiy, Q. Liu & Kociolek , sp. nov. SEM. External views. White arrow show the opening of the rimoportulae. Scale bars: A, 10 μm; B, C, 2 μm; D, E, 1 μm. SEM, internal views ( Fig 14 ) Striae uniseriate or biseriate lying in narrow depressions ( Fig. 14 B-E). Uniseriate striae present especially in the central part of valve ( Fig. 14 B-E). Striae extend onto the mantle ( Fig. 14B ). Axial area is narrow and evidently broader near the central area. Central area is large, unilaterally-expanded on the ventral side, without ghost striae ( Fig. 14A, B, E ). One rimoportula is present at each valve apex. Ocellimbi are present on each valve ends on the mantle.