Yabuki Akinori, Kamikawa Ryoma, Ishikawa Sohta A, Kolisko Martin, Kim Eunsoo, Tanabe Akifumi S, Kume Keitaro, Ishida Ken-ichiro, Inagki Yuji
1] Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa, Japan [2].
1] Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Kyoto, Japan [2] Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Kyoto, Japan [3].
Sci Rep. 2014 Apr 10;4:4641. doi: 10.1038/srep04641.
Phylogenetic position of the marine biflagellate Palpitomonas bilix is intriguing, since several ultrastructural characteristics implied its evolutionary connection to Archaeplastida or Hacrobia. The origin and early evolution of these two eukaryotic assemblages have yet to be fully elucidated, and P. bilix may be a key lineage in tracing those groups' early evolution. In the present study, we analyzed a 'phylogenomic' alignment of 157 genes to clarify the position of P. bilix in eukaryotic phylogeny. In the 157-gene phylogeny, P. bilix was found to be basal to a clade of cryptophytes, goniomonads and kathablepharids, collectively known as Cryptista, which is proposed to be a part of the larger taxonomic assemblage Hacrobia. We here discuss the taxonomic assignment of P. bilix, and character evolution in Cryptista.
海洋双鞭毛虫双鞭帕金藻（Palpitomonas bilix）的系统发育位置很有趣，因为一些超微结构特征表明它与古质体生物或囊泡虫有进化联系。这两个真核生物类群的起源和早期进化尚未完全阐明，而双鞭帕金藻可能是追踪这些类群早期进化的关键谱系。在本研究中，我们分析了157个基因的“系统发育基因组”比对，以阐明双鞭帕金藻在真核生物系统发育中的位置。在157个基因的系统发育中，发现双鞭帕金藻位于隐藻、角鞭毛虫和卡氏藻的进化枝基部，这些生物统称为隐藻门，被认为是更大的分类组合囊泡虫的一部分。我们在此讨论双鞭帕金藻的分类归属以及隐藻门的性状进化。
