Estuary Research Center, Shimane University, 1060, Nishikawatsu-cho, Matsue 690-8504, Japan; Department of Botany, National Museum of Nature and Science, 4-1-1, Amakubo, Tsukuba 305-0005, Japan.
Department of Botany, National Museum of Nature and Science, 4-1-1, Amakubo, Tsukuba 305-0005, Japan.
Protist. 2021 Jul;172(3):125808. doi: 10.1016/j.protis.2021.125808. Epub 2021 May 13.
The phylogenetic affiliation of Oroscenidae, a family of Radiolaria possessing large siliceous skeletons, was thoroughly revised in this study. Plankton sampling was conducted over seven years in seven sea areas of the Northern Hemisphere. Molecular analyses on the obtained specimens revealed that living oroscenids are phylogenetically different from hitherto-known radiolarian orders. The detailed examinations by Microfocus X-ray Computed Tomography and Scanning Electron Microscopy clarified that oroscenids and the related family (Thalassothamnidae) have unique skeletal characteristics different from other radiolarian orders. Judging from their phylogenetic distinctiveness and the difference in the morphology and ecology, Oroscenidae and Thalassothamnidae should be classified in a single order distinct from other radiolarian orders, and consequently, a new order, Orodaria, is established.
在这项研究中，对具有大型硅质骨骼的放射虫科 Oroscenidae 的系统发育关系进行了彻底修订。在七年时间里，在北半球的七个海域进行了浮游生物采样。对获得的标本进行的分子分析表明，活体 Oroscenidae 在系统发育上与迄今已知的放射虫目不同。通过微焦点 X 射线计算机断层扫描和扫描电子显微镜的详细检查，澄清了 Oroscenidae 和相关科（Thalassothamnidae）具有与其他放射虫目不同的独特骨骼特征。从它们的系统发育独特性以及形态和生态的差异来看，Oroscenidae 和 Thalassothamnidae 应该被归类为一个与其他放射虫目不同的单独目，因此，一个新目，Orodaria，被建立。
