FN Archimer Export Format PT J TI An emended description and phylogeny of the little-known Prorocentrum sipadanense Mohammad-Noor, Daugbjerg & Moestrup (Prorocentrales, Dinophyceae) from the Indian Ocean, Oman BT AF SABUROVA, Maria CHOMERAT, Nicolas AS 1:1;2:2; FF 1:;2:PDG-ODE-LITTORAL-LERBO; C1 Kuwait Inst Sci Res, Environm & Life Sci Res Ctr, POB 1638, Salmiya 22017, Kuwait. IFREMER, LER BO, Stn Biol Marine, Pl Croix, F-29900 Concarneau, France. C2 KUWAIT INST SCI RES, KUWAIT IFREMER, FRANCE SI CONCARNEAU SE PDG-ODE-LITTORAL-LERBO IN WOS Ifremer jusqu'en 2018 copubli-int-hors-europe IF 2.412 TC 3 UR https://archimer.ifremer.fr/doc/00319/42990/42560.pdf LA English DT Article DE ;Arabian Sea;benthic dinoflagellates;molecular phylogeny;morphology;Oman;Prorocentrum sipadanense;taxonomy AB A small Prorocentrum species was found during a pilot taxonomic survey of marine benthic dinoflagellates in the northwestern Arabian Sea, Oman. Based on the study of cells from natural samples and laboratory cultures using light and scanning electron microscopy, this taxon is attributed to the little-known Prorocentrum sipadanense, recorded so far only from East Malaysia. The description of this species has been emended to include details of internal cell structure, composition of its periflagellar area and intraspecific variability in size, shape and pore pattern. Round to oval or ovoid cells of P. sipadanese are surrounded by a prominent marginal ridge and are 17.9–23.9 µm long and 15.0–19.8 µm wide, with a foveate to reticulate thecal plate surface and asymmetric and scarce pore pattern. The small, V-shaped periflagellar area is composed of nine platelets. Cells possess two golden-brown chloroplasts with a central starch-sheathed pyrenoid and small posterior nucleus. In addition, the phylogenetic position of this taxon in Prorocentrum was revealed for the first time based on SSU and LSU rDNA data. The presence of P. sipadanense among epiphytic dinoflagellates from the Omani coast constitutes its first report from the Indian Ocean. PY 2016 SO European Journal Of Phycology SN 0967-0262 PU Taylor & Francis Ltd VL 51 IS 3 UT 000379756100003 BP 270 EP 281 DI 10.1080/09670262.2015.1134815 ID 42990 ER EF