Appendix A. Microfocus X-ray Computed Tomography cross-sectional images of Joergensenium arcticum Ikenoue, Dumitrica and Bjørklund n. sp.

Radiolarians in the Arctic Ocean have been studied lately in both plankton and sediment trap samples in the Chukchi Sea area. These studies have shed light on new radiolarian taxa, especially within the order Entactinaria, including two new species of Joergensenium, Joergensenium arcticum from the w...

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Bibliographic Details
Main Authors: Ikenoue, Takahito, Bjorklund, Kjell R, Dumitrica, Paulian, Krabberød, Anders K, Kimoto, Kastunori, Matsuno, Kohei, Harada, Naomi
Format: Dataset
Language:English
Published: PANGAEA 2016
Subjects:
Arctic
Arctic Ocean
Norwegian Sea
Chukchi Sea
Pacific
Bjørklund
Chukchi
Fram Strait
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.858325
https://doi.org/10.1594/PANGAEA.858325
Description
Summary:Radiolarians in the Arctic Ocean have been studied lately in both plankton and sediment trap samples in the Chukchi Sea area. These studies have shed light on new radiolarian taxa, especially within the order Entactinaria, including two new species of Joergensenium, Joergensenium arcticum from the western Arctic Ocean, so far restricted to the Pacific Winter Water in the Chukchi Sea, and Joergensenium clevei hitherto found in the northern part of the Norwegian Sea south of the Fram Strait. The taxonomic position of the order Entactinaria is discussed and the genus Joergensenium has been emended. We have also observed in detail the internal structure of J. arcticum using Microfocus X-ray Computed Tomography and have utilized three-dimensional imaging for the first time in a species description.

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