A new species of Tabularia (Kützing) Williams & Round from Poyang Lake, Jiangxi Province, China, with a cladistic analysis of the genus and their relatives Author Cao, Yue College of Life and Environment Science, Shanghai Normal University, Shanghai 200234, China Author Yu, Pan College of Life and Environment Science, Shanghai Normal University, Shanghai 200234, China Author You, Qingmin College of Life and Environment Science, Shanghai Normal University, Shanghai 200234, China Author Lowe, Rex L. Department of Biological Sciences, Bowling Green State University, Bowling Green, OH, U. S. A. Author Williams, David M. Department of Life Sciences, the Natural History Museum, Cromwell Road, London, SW 75 BD, UK Author Wang, Quanxi College of Life and Environment Science, Shanghai Normal University, Shanghai 200234, China Author Kociolek, J. P. Museum of Natural History and Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, U. S. A. & School of Life Science, Shanxi University, Taiyuan 030006, China text Phytotaxa 2018 2018-10-29 373 3 169 183 http://dx.doi.org/10.11646/phytotaxa.373.3.1 journal article 10.11646/phytotaxa.373.3.1 1179-3163 13728608 Tabularia sinensis sp. nov. ( Fig. 2 = holotype ) TYPE :— CHINA , SHTU , slide PYH-201708-05, Shanghai Normal University , Biology Department Diatom Herbarium , Shanghai , China. Holotype illustrated in Fig. 2 . LM: Valves linear, margins parallel, slightly swelling at centre, tapering to blunt, squared apices, valve length = 65–175 μm, breadth = 5.5–6.5 μm. Striae short, parallel to radiate, 13–15 in 10 μm, producing very wide sternum. Rimportula positioned near each valve apex, as simple opening on valve face, obliquely situated. SEM: Externally, valve face ornamentation limited to margins and apices ( Figs 22–27 ). Each striae with longitudinally-oriented areolae, composed of wide virgae and slender vimines, covered by a cribrum (closing plate), occupying most of the opening ( Fig. 25 ). Cribrum solid, without subdivisions ( Figs 23, 25 ). On valve face, stria comprised of 4–7 areolae (complex of virgae and vimines), that nearest the sternum smaller than the rest; areolae extending onto valve mantle. Near 2 nd or 3 rd stria from each apex, a rimoportula evident by the narrow elliptical opening ( Fig. 23 ). Ocellulimbus sunken into mantle apex. Ocellulimbus comprised of 7–10 rows of round porelli. Two small, tapering spines at each pole, overhang ocellulimbus ( Figs 23, 24, 27 ). Internally, valve dominated by broad sternum (lamina) extending entire length of valve ( Fig. 28 ). Rimoportula projects inwards, with distinctive paired thickened margins ( Fig. 29 ). Striae composed of a single opening, subdivided externally ( Figs 31–33 ). Ocellulimbus comprised of round porelli ( Fig. 30 ). Girdle not well documented, valvocopula plain, tapering towards poles. Isotype : COLO , slide 614007, Kociolek Collection, University of Colorado , Museum of Natural History Diatom Herbarium, Boulder, USA . Type Locality: CHINA . Poyang Lake, Jiangxi Province Etymology: Named for it being from China