Organ systems of a Cambrian euarthropod larva
Smith, Martin R. and Long, Emma J. and Dhungana, Alavya and Dobson, Katherine J. and Yang, Jie and Zhang, Xiguang (2024) Organ systems of a Cambrian euarthropod larva. Nature, 633. pp. 120-126. ISSN 0028-0836 (https://doi.org/10.1038/s41586-024-07756-8)
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Abstract
The Cambrian radiation of euarthropods can be attributed to an adaptable body plan. Sophisticated brains and specialized feeding appendages, which are elaborations of serially repeated organ systems and jointed appendages, underpin the dominance of Euarthropoda in a broad suite of ecological settings. The origin of the euarthropod body plan from a grade of vermiform taxa with hydrostatic lobopodous appendages ('lobopodian worms') is founded on data from Burgess Shale-type fossils. However, the compaction associated with such preservation obscures internal anatomy . Phosphatized microfossils provide a complementary three-dimensional perspective on early crown group euarthropods , but few lobopodians . Here we describe the internal and external anatomy of a three-dimensionally preserved euarthropod larva with lobopods, midgut glands and a sophisticated head. The architecture of the nervous system informs the early configuration of the euarthropod brain and its associated appendages and sensory organs, clarifying homologies across Panarthropoda. The deep evolutionary position of Youti yuanshi gen. et sp. nov. informs the sequence of character acquisition during arthropod evolution, demonstrating a deep origin of sophisticated haemolymph circulatory systems, and illuminating the internal anatomical changes that propelled the rise and diversification of this enduringly successful group.
ORCID iDs
Smith, Martin R., Long, Emma J., Dhungana, Alavya, Dobson, Katherine J. ORCID: https://orcid.org/0000-0003-2272-626X, Yang, Jie and Zhang, Xiguang;-
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Item type: Article ID code: 90494 Dates: DateEvent5 September 2024Published31 July 2024Published Online4 June 2024AcceptedSubjects: Science > Natural history Department: Faculty of Engineering > Civil and Environmental Engineering Depositing user: Pure Administrator Date deposited: 06 Sep 2024 07:06 Last modified: 06 Oct 2024 00:42 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/90494