Articles | Volume 39, issue 1
https://doi.org/10.5194/jm-39-61-2020
https://doi.org/10.5194/jm-39-61-2020
Research article
 | 
26 May 2020
Research article |  | 26 May 2020

Skeletal architecture of middle Cambrian spicular radiolarians revealed using micro-CT

Jiani Sheng, Sarah Kachovich, and Jonathan C. Aitchison

Related subject area

Siliceous microfossils
Direct link between iceberg melt and diatom productivity demonstrated in Mid-Pliocene Amundsen Sea interglacial sediments
Heather Furlong and Reed Paul Scherer
J. Micropalaeontol., 43, 269–282, https://doi.org/10.5194/jm-43-269-2024,https://doi.org/10.5194/jm-43-269-2024, 2024
Short summary
Two new clavate Fragilariopsis and one new Rouxia diatom species with biostratigraphic and paleoenvironmental applications for the Pliocene-Pleistocene, East Antarctica
Grace Duke, Josie Frazer, Briar Taylor-Silva, and Christina Riesselman
J. Micropalaeontol., 43, 139–163, https://doi.org/10.5194/jm-43-139-2024,https://doi.org/10.5194/jm-43-139-2024, 2024
Short summary
Diatom and radiolarian biostratigraphy in the Pliocene sequence of ODP Site 697 (Jane Basin, Atlantic sector of the Southern Ocean)
Yuji Kato, Iván Hernández-Almeida, and Lara F. Pérez
J. Micropalaeontol., 43, 93–119, https://doi.org/10.5194/jm-43-93-2024,https://doi.org/10.5194/jm-43-93-2024, 2024
Short summary
Progress in the taxonomy of Late Cretaceous high-latitude radiolarians: insights from the Horton River area, Northwest Territories, Canada
Juan F. Diaz, Noritoshi Suzuki, Jennifer M. Galloway, and Manuel Bringué
J. Micropalaeontol., 43, 69–80, https://doi.org/10.5194/jm-43-69-2024,https://doi.org/10.5194/jm-43-69-2024, 2024
Short summary
Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast
Mutsumi Iizuka, Takuya Itaki, Osamu Seki, Ryosuke Makabe, Motoha Ojima, and Shigeru Aoki
J. Micropalaeontol., 43, 37–53, https://doi.org/10.5194/jm-43-37-2024,https://doi.org/10.5194/jm-43-37-2024, 2024
Short summary

Cited articles

Aitchison, J. C., Suzuki, N., Caridroit, M., Danelian, T., and Noble, P. J.: Paleozoic radiolarian biostratigraphy, Geodiversitas, 39, 503–531, https://doi.org/10.5252/g2017n3a5, 2017. 
Anderson, O. R. and Bennett, P.: A conceptual and quantitative analysis of skeletal morphogenesis in living species of solitary radiolaria: Euchitonia elegans and Spongaster tetras, Mar. Micropaleontol., 9, 441–454, https://doi.org/10.1016/0377-8398(85)90010-6, 1985. 
Babcock, L. E., Robison, R. A., Rees, M. N., Peng, S., and Saltzman, M. R.: The Global boundary Stratotype Section and Point (GSSP) of the Drumian Stage (Cambrian) in the Drum Mountains, Utah, USA, Episodes, 30, 85–95, https://doi.org/10.18814/epiiugs/2007/v30i2/003, 2007. 
Bengtson, S.: Siliceous microfossils from the Upper Cambrian of Queensland, Alcheringa, 10, 195–216, https://doi.org/10.1080/03115518608619155, 1986. 
Braun, A., Chen, J., Waloszek, D., and Maas, A.: First early Cambrian Radiolaria, Geol. Soc. Spec. Publ., 286, 143–149, https://doi.org/10.1144/SP286.10, 2007. 
Download
Short summary
To better understand radiolarian evolution and taxonomy, two middle Cambrian specimens recovered from Australia were studied using micro-CT. Analyses of their 3-D models revealed for the first time their skeletal architecture constructed of spicules. Insertion of an artificial sphere into their shells indicates that they may have secreted their spicules one by one during cell enlargement. The timing of skeletal genesis may be an important factor influencing the morphology of early radiolarians.