Hehenberger Elisabeth, James Erick R, Del Campo Javier, Buckland-Nicks John A, Reimchen Thomas E, Keeling Patrick J
Canadian Institute for Advanced Research, Department of Botany, University of British Columbia, 3529-6270 University Boulevard, Vancouver, BC, V6T 1Z4, Canada.
Department of Biology, St. Francis Xavier University, 2320 Notre Dame Ave., Antigonish, NS, B2G 2W5, Canada.
J Eukaryot Microbiol. 2018 Jan;65(1):127-131. doi: 10.1111/jeu.12430. Epub 2017 Jun 19.
The dinoflagellate Haidadinium ichthyophilum Buckland-Nicks, Reimchen and Garbary 1997 is an ectoparasite of the spine-deficient, three-spine stickleback Gasterosteus aculeatus L. Reimchen 1984, a fish endemic to Rouge Lake, Haida Gwaii. Haidadinium ichthyophilum proved difficult to assign taxonomically because its morphology and complex life cycle exhibited defining characteristics of both autotrophic and heterotrophic dinoflagellates, and was tentatively assigned to the Phytodiniales. Here, we characterized a 492 bp fragment of the small subunit ribosomal RNA (SSU rRNA) from preserved H. ichthyophilum cysts. In SSU phylogeny, H. ichthyophilum branches with the fish parasites, Piscinoodinium sp., strongly supporting the inclusion of H. ichthyophilum within the Suessiales.
1997年，巴克兰-尼克斯、雷姆申和加巴里发现的嗜鱼海链藻（Haidadinium ichthyophilum）是三刺鱼（Gasterosteus aculeatus L. Reimchen 1984）的一种体表寄生虫，三刺鱼是海达瓜伊鲁日湖特有的一种鱼类。嗜鱼海链藻在分类学上很难归类，因为其形态和复杂的生命周期表现出了自养和异养甲藻的典型特征，因此暂时被归入植甲藻目（Phytodiniales）。在这里，我们对保存的嗜鱼海链藻囊肿的小亚基核糖体RNA（SSU rRNA）的492 bp片段进行了特征分析。在SSU系统发育中，嗜鱼海链藻与鱼类寄生虫皮栖藻属（Piscinoodinium sp.）分支在一起，有力地支持了将嗜鱼海链藻归入苏氏藻目（Suessiales）。
