title: DESCRIPTION OF A NEW NAVICULOID DIATOM GENUS MORENEIS GEN. NOV. (BACILLARIOPHYCEAE) FROM SAND FLATS IN KOREA(1).
abstract: This article describes a new diatom genus Moreneis from the Yellow Sea sand flats on the west coast of Korea. The new genus is characterized by a unique combination of morphological characteristics, including the shape of the plastids, which have not been previously observed in diatoms. The valve morphology resembles other genera belonging to Lyrellaceae, within which we place this genus. In terms of areolae structure, Moreneis resembles Petroneis and Placoneis; however, it differs from both genera with respect to the raphe system and plastid shape. Cells of Moreneis spp. have a single large plastid appressed to the girdle of the secondary side of the valve, with two lobes extended toward the primary side of the valve. Furthermore, the unique feature of Moreneis frustules is the raphe, which has both external central and apical endings bent in opposite directions. We differentiated four taxa, which we describe as new for science. However, based on our findings, several established species from Navicula should also be formally transferred to Moreneis, including N. alpha Cleve, N. besarensis Giffen, N. epsilon Cleve, N. menaiana Hendey, N. polae Heiden, and N. quadri-undulata F. Meister. Analysis of published data revealed that species belonging to Moreneis are numerous in tropical marine littoral waters, and in moderate climate zones, especially in the western Pacific, with only a few species occurring in the Mediterranean and Atlantic.
authors.affiliation: School of Earth and Envrionmental Sciences (Oceanography), Seoul National University, Seoul 151-742, Republic of KoreaDivision of Environmental Science and Ecological Engineering, Korea University, Seoul 136-713, Republic of KoreaBiwa Lake Museum, Oroshimo 1091, Kusatsu, Shiga 525-0001, JapanInstitute of Marine Sciences, University of Szczecin, Mickiewicza 18, PL-70-383 Szczecin, Poland.
authors.forename: Jinsoon
authors.initials: J
authors.lastname: Park
authors.affiliation: School of Earth and Envrionmental Sciences (Oceanography), Seoul National University, Seoul 151-742, Republic of KoreaDivision of Environmental Science and Ecological Engineering, Korea University, Seoul 136-713, Republic of KoreaBiwa Lake Museum, Oroshimo 1091, Kusatsu, Shiga 525-0001, JapanInstitute of Marine Sciences, University of Szczecin, Mickiewicza 18, PL-70-383 Szczecin, Poland.
authors.forename: Chul-Hwan
authors.initials: CH
authors.lastname: Koh
authors.affiliation: School of Earth and Envrionmental Sciences (Oceanography), Seoul National University, Seoul 151-742, Republic of KoreaDivision of Environmental Science and Ecological Engineering, Korea University, Seoul 136-713, Republic of KoreaBiwa Lake Museum, Oroshimo 1091, Kusatsu, Shiga 525-0001, JapanInstitute of Marine Sciences, University of Szczecin, Mickiewicza 18, PL-70-383 Szczecin, Poland.
authors.forename: Jong Seong
authors.initials: JS
authors.lastname: Khim
authors.affiliation: School of Earth and Envrionmental Sciences (Oceanography), Seoul National University, Seoul 151-742, Republic of KoreaDivision of Environmental Science and Ecological Engineering, Korea University, Seoul 136-713, Republic of KoreaBiwa Lake Museum, Oroshimo 1091, Kusatsu, Shiga 525-0001, JapanInstitute of Marine Sciences, University of Szczecin, Mickiewicza 18, PL-70-383 Szczecin, Poland.
authors.forename: Taisuke
authors.initials: T
authors.lastname: Ohtsuka
authors.affiliation: School of Earth and Envrionmental Sciences (Oceanography), Seoul National University, Seoul 151-742, Republic of KoreaDivision of Environmental Science and Ecological Engineering, Korea University, Seoul 136-713, Republic of KoreaBiwa Lake Museum, Oroshimo 1091, Kusatsu, Shiga 525-0001, JapanInstitute of Marine Sciences, University of Szczecin, Mickiewicza 18, PL-70-383 Szczecin, Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Witkowski
keywords: Korea; Lyrellaceae; Moreneis; Yellow Sea; new genus; plastid; raphe; sand flat