Systematics of araphid diatoms with asymmetric rimoportulae or densely packed virgae, with particular attention to Hyalosynedra (Ulnariaceae, Bacillariophyta) Author Sabir, J. S. M. Genomic and Biotechnology Research Group, Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia Author Theriot, E. C. Department of Integrative Biology, University of Texas at Austin, Austin, Texas, USA Author Lobban, C. S. Division of Natural Sciences, University of Guam, Mangilao, Guam 96923, USA Author Alhebshi, A. M. Genomic and Biotechnology Research Group, Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia Author Al-Malki, A. L. Department of Biochemistry, Faculty of Science, KAU, Jeddah 21589, Saudi Arabia. Author Hajrah, N. H. Genomic and Biotechnology Research Group, Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia Author Khiyami, M. A. King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia. Author Obaid, A. Y. Department of Chemistry, Faculty of Science, KAU, Jeddah 21589, Saudi Arabia. Author Jansen, R. K. Genomic and Biotechnology Research Group, Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia & Department of Integrative Biology, University of Texas at Austin, Austin, Texas, USA Author Ashworth, M. A. Department of Integrative Biology, University of Texas at Austin, Austin, Texas, USA text Phytotaxa 2018 2018-04-10 347 1 1 49 http://dx.doi.org/10.11646/phytotaxa.347.1.1 journal article 10.11646/phytotaxa.347.1.1 1179-3163 Hyalosynedra laevigata (Grunow) Williams and Round Basionym: — Synedra laevigata Grunow (1877 , 166) Synonyms: — Synedra laevigata var. obtiuscula Grunow (1877) p. 166 , pl. 193, fig. 4; Fragilaria laevigata (Grun.) Lange-Bertalot (1980) p. 752. Type locality: —” ... I have seen this diatom from various localities ( Honduras , Mauritius , Samoa Islands)...” Grunow (1877) , p.166. Lectotype : —Naturhistorisches Museum Wein, Grunow 839 Material studied: —Grunow 839 and 840 Naturhistorisches Museum Wein; Cultured material (“21IV14-4D long synedroid 27”) from collection ECT4118 , epiphyte samples taken from Anadyomene spp. thalli from Rabbit Key Basin , Florida , USA ( 24 o 58.60’ N , 80 o 50.41’ W )