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Title: Origin of raptorial feeding in juvenile euarthropods revealed by a Cambrian radiodontan
Contributor(s): Liu, Jianni (author); Lerosey-Aubril, Rudy  (author)orcid ; Steiner, Michael (author); Dunlop, Jason A (author); Shu, Degan (author); Paterson, John R  (author)orcid 
Publication Date: 2018-11
Early Online Version: 2018-06-01
Open Access: Yes
DOI: 10.1093/nsr/nwy057Open Access Link
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Abstract: The rapid rise of arthropods during the Cambrian quickly established some clades, such as the euarthropod stem-group called Radiodonta, as the dominant and most diverse predators in marine ecosystems. Recent discoveries have shown that the size and dietary ecology of radiodontans are far more diverse than previously thought, but little is known about the feeding habits of juveniles. Here, we document a very small (~18-mm-long), near-complete specimen of the radiodontan Lyrarapax unguispinus from the early Cambrian Chengjiang Biota of China. This specimen is the smallest radiodontan individual known, representing a juvenile instar. Its adult-like morphology-especially the fully developed spinose frontal appendages and tetraradial oral cone-indicates that L. unguispinus was a well-equipped predator at an early developmental stage, similar to modern raptorial euarthropods, such as mantises, mantis shrimps and arachnids. This evidence, coupled with the basal phylogenetic position of radiodontans, confirms that raptorial feeding habits in juvenile euarthropods appeared early in the evolutionary history of the group.
Publication Type: Journal Article
Grant Details: ARC/FT120100770
Source of Publication: National Science Review, 5(6), p. 863-869
Publisher: Oxford University Press
Place of Publication: United Kingdom
ISSN: 2095-5138
Field of Research (FOR): 040308 Palaeontology (incl. Palynology)
060206 Palaeoecology
060301 Animal Systematics and Taxonomy
Socio-Economic Objective (SEO): 970104 Expanding Knowledge in the Earth Sciences
970106 Expanding Knowledge in the Biological Sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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