Ecology, Morphology, Phylogeny and Taxonomic Revision of Giant Radiolarians, Orodaria ord. nov. (Radiolaria; Rhizaria; SAR)

[Display omitted] 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 specime...

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Bibliographic Details
Published in:Protist 2021-07, Vol.172 (3), p.125808-125808, Article 125808
Main Authors: Nakamura, Yasuhide, Tuji, Akihiro, Kimoto, Katsunori, Yamaguchi, Atsushi, Hori, Rie S., Suzuki, Noritoshi
Format: Article
Language:English
Subjects:
MXCT
shell-bearing protist
silica
single-cell PCR
unicellular zooplankton
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Summary:[Display omitted] 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.
ISSN:1434-4610
1618-0941
DOI:10.1016/j.protis.2021.125808