Adding a new dimension to investigations of early radiolarian evolution
| Autor: | Sarah Kachovich, Jiani Sheng, Jonathan C. Aitchison |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Systematics Multidisciplinary Range (biology) Newfoundland and Labrador lcsh:R Australia lcsh:Medicine X-Ray Microtomography 03 medical and health sciences Paleontology 030104 developmental biology 0302 clinical medicine Rhizaria Ordovician Animals lcsh:Q Evolutionary ecology lcsh:Science 030217 neurology & neurosurgery Geology Phylogeny |
| Zdroj: | Scientific Reports, Vol 9, Iss 1, Pp 1-10 (2019) |
| ISSN: | 2045-2322 |
| Popis: | Knowledge of the detailed architecture of the earliest radiolarian microfossils is key to resolving the evolution and systematics of this important group of marine protozoans. Non-destructive methods for observing the complexity within the internal structures of their siliceous skeletons have long eluded paleontologists. By developing methodologies that overcome some limitations of existing micro-computed tomography (micro-CT) we demonstrate a technique with potential to provide new insight into their evolution. Using 3D micro-CT data to generate models for six well-preserved siliceous radiolarian skeletons from the Middle Cambrian Inca Formation in far north Queensland, Australia and the Middle Ordovician Piccadilly Formation, in western Newfoundland, Canada, we can reconstruct phylogenetic relationships amongst some of the earliest radiolarians. Better knowledge of early radiolarian morphologies clarifies the vital function of internal structures and hierarchical diagnosis across a range of taxonomic affiliations. |
| Databáze: | OpenAIRE |
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