Rediscovery of the Lissodinium type species, Lissodinium schilleri Matzenauer (Dinophyceae), a non-cingulum-bearing dinoflagellate: notes on morphology and phylogeny

Title
Rediscovery of the Lissodinium type species, Lissodinium schilleri Matzenauer (Dinophyceae), a non-cingulum-bearing dinoflagellate: notes on morphology and phylogeny
Author(s)
LIZHUN; 강병준; 한경하; 신현호
KIOST Author(s)
Han, Kyong Ha(한경하)Shin, Hyeon Ho(신현호)
Alternative Author(s)
LIZHUN; 강병준; 한경하; 신현호
Publication Year
2018-05-24
Abstract
In contrast to the typical peridinioid dinoflagellates, the family Podolampadaceae is characterized by the absence of both a cingulum and a depressed sulcus. The genus Lissodinium is the largest genus within this family, currently including 18 species. However, species of the genus Lissodinium have only been observed in fixed samples, yet they remain poorly known because they have always been recorded at extremely low abundances. Until now, the live cell and molecular data of Lissodinium were not available. In this study, we re-examine the morphological features of L.schilleri collected from the East China Sea and Korean coastal waters, and present the first phylogenetic analyses based on SSU rDNA, ITS region (ITS1-5.8S-ITS2) and LSU rDNA gene sequences from single specimens. Cells of L. schilleri are approximately pebble-shaped, 29– 40 μm in length and 24– 35 μm in width. The nucleus is oval-shaped, about 25 μm long and 13 μm wide, positioned dorsally near the center of the cell. A large red pigment body is present near the position of the nucleus. The thecal plate pattern is APC, 3, 1a, 5, 4c, 5s, 5, 3. The thecal surface is smooth many small pores are randomly distributed on the thecal surface which maybe round or elongated. Molecular phylogenetic analysis using SSU rRNA gene sequences shows that L. schilleri is allied with other podolampadaceans. Concatenated phylogeny reveals t 18 species. However, species of the genus Lissodinium have only been observed in fixed samples, yet they remain poorly known because they have always been recorded at extremely low abundances. Until now, the live cell and molecular data of Lissodinium were not available. In this study, we re-examine the morphological features of L.schilleri collected from the East China Sea and Korean coastal waters, and present the first phylogenetic analyses based on SSU rDNA, ITS region (ITS1-5.8S-ITS2) and LSU rDNA gene sequences from single specimens. Cells of L. schilleri are approximately pebble-shaped, 29– 40 μm in length and 24– 35 μm in width. The nucleus is oval-shaped, about 25 μm long and 13 μm wide, positioned dorsally near the center of the cell. A large red pigment body is present near the position of the nucleus. The thecal plate pattern is APC, 3, 1a, 5, 4c, 5s, 5, 3. The thecal surface is smooth many small pores are randomly distributed on the thecal surface which maybe round or elongated. Molecular phylogenetic analysis using SSU rRNA gene sequences shows that L. schilleri is allied with other podolampadaceans. Concatenated phylogeny reveals t
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23303
Bibliographic Citation
한국해양학회 춘계학술대회, pp.147, 2018
Publisher
한국해양학회
Type
Conference
Language
English
Publisher
한국해양학회
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