Ikenoue, Takahito; Bjorklund, Kjell R; Dumitrica, Paulian; Krabberød, Anders K; Kimoto, Katsunori; Matsuno, Kohei; Harada, Naomi (2016): Appendix A. Microfocus X-ray Computed Tomography cross-sectional images of Joergensenium arcticum Ikenoue, Dumitrica and Bjørklund n. sp [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.858325,

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Supplement to: Ikenoue, T et al. (2016): Two new living Entactinaria (Radiolaria) species from the Arctic province: Joergensenium arcticum n. sp. and Joergensenium clevei n. sp. Marine Micropaleontology, 124, 75-94, https://doi.org/10.1016/j.marmicro.2016.02.003

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.

The CT-scanned 3D images of J. arcticum (Appendix A) can be visualized by 3D image viewer "Molcer Plus" (http://www.white-rabbit.jp/molcerPlusE.html).