InterRad designates the International Association of Radiolarists. It is a nonprofit organization that promotes research on all aspects of radiolarian-related fields. Meetings of InterRad (including the former Eurorad) have been held every three years regularly since 1970. The 15th meeting of InterRad (InterRad XV) was organized from 20 October to 1 November, 2017 in Japan. The first Theme Issue for InterRad XV appeared as Paleontological Research, Vol. 23, No. 4, October 2019 and included six articles listed below. This is the second Theme Issue for InterRad XV and also contains six articles.
Articles in Paleontological Research, Vol. 23, No. 4
Ichinohe, R., Shiino, Y., Kurihara, T. and Kishimoto, N., 2019: Active floating with buoyancy of pseudopodia versus passive floating by hydrodynamic drag force: A case study of the flat-shaped spumellarian radiolarian Dictyocoryne. Paleontological Research, vol. 23, p. 236–244.
Kamikuri, S., Moore, T. C., Matsui, H. and Nishi, H., 2019: Radiolarian biostratigraphy and faunal turnover across the early/middle Miocene boundary in the equatorial Pacific. Paleontological Research, vol. 23, p. 245–260.
Ito, T., Takahashi, K. U., Matsuoka, A. and Feng, Q., 2019: The Guadalupian (Permian) Gufeng Formation on the north margin of the South China block: A review of the lithostratigraphy, radiolarian biostratigraphy, and geochemical characteristics. Paleontological Research, vol. 23, p. 261–280.
Ito, T., Zhang, L., Feng, Q. and He, W., 2019: New radiolarian genus Ganjiangmoyea gen. nov. from the Lopingian (upper Permian) in Guangxi, South China. Paleontological Research, vol. 23, p. 281–290.
Li, G., Matsuoka, A., Yang, Q. and Sha, J., 2019: Middle and Late Jurassic radiolarians from Nadanhada terrane of eastern Heilongjiang Province, northeastern China. Paleontological Research, vol. 23, p. 291–313.
Danelian, T. and MacLeod, N., 2019: Morphometric analysis of two Eocene related radiolarian species of the Podocyrtis (Lampterium) lineage. Paleontological Research, vol. 23, p. 314–330.
Articles in Paleontological Research, Vol. 24, No. 2
Li, X. and Matsuoka, A., 2020: Paleobiogeographic distribution of the Early Cretaceous radiolarian Turbocapsula costata and its correlation potential. Paleontological Research, vol. 24, p. 89–102.
Suzuki, H., Ja, L., Maung, M., Thin, A. K. and Kuwahara, K., 2020: The first report on Early Cretaceous Radiolaria from Myanmar. Paleontological Research, vol. 24, p. 103–112.
Matsuzaki, K. M., Itaki, T. and Sugisaki, S., 2020: Polycystine radiolarians vertical distribution in the subtropical Northwest Pacific during Spring 2015 (KS15-4). Paleontological Research, vol. 24, p. 113–133.
Shiino, Y., Kurihara, T., Ichinohe, R., Kishimoto, N., Yoshino, T. and Matsuoka, A., 2020: A morphological analysis of the flat-shaped spumellarian radiolarian Dictyocoryne: morpho-functional insights into a planktonic mode of life. Paleontological Research, vol. 24, p. 134–146.
Sano, S., 2020: Boreal molluscan records around the Jurassic–Cretaceous boundary in East Asia provide clues for the paleobiogeographical reconstruction in the mid-latitudes of the Northwest Pacific. Paleontological Research, vol. 24, p. 147–160.
Nakagawa, T. and Wakita, K., 2020: Morphological insights from extremely well-preserved Parafollicucullus (Radiolaria, Order Albaillellaria) from a probable Roadian (Guadalupian, middle Permian) manganese nodule in the Nishiki Group of the Akiyoshi Belt, Southwest Japan. Paleontological Research, vol. 24, p. 161–177.
The two InterRad XV Theme Issues are thus composed of 12 articles in total. We would like to express our sincere thanks to the Palaeontological Society of Japan for co-hosting the meeting. Our special thanks go to Yasunari Shigeta, former Chief Editor of Paleontological Research and editorial staffs for their excellent work.
