ArticleNature communications2021
Exites in Cambrian arthropods and homology of arthropod limb branches.
Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 26 citations in OpenAlex.
- Article
- Article
- Unveiling the ventral morphology of a rare early Cambrian great appendage arthropod from the Chengjiang biota of China.BMC biology · 2024Article
- Back to life: Techniques for developing high-quality 3D reconstructions of plants and animals from digitized specimens.PloS one · 2023Article
- Ventral Morphology of the Non-Trilobite ArtiopodBiology · 2022Article
- The evolution of biramous appendages revealed by a carapace-bearing Cambrian arthropod.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
- Probability-based preservational variations within the early Cambrian Chengjiang biota (China).PeerJ · 2022Article
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Authors and funding
9 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The last common ancestor of all living arthropods had biramous postantennal appendages, with an endopodite and exopodite branching off the limb base. Morphological evidence for homology of these rami between crustaceans and chelicerates has, however, been challenged by data from clonal composition and from knockout of leg patterning genes. Cambrian arthropod fossils have been cited as providing support for competing hypotheses about biramy but have shed little light on additional lateral outgrowths, known as exites. Here we draw on microtomographic imaging of the Cambrian great-appendage arthropod Leanchoilia to reveal a previously undetected exite at the base of most appendages, composed of overlapping lamellae. A morphologically similar, and we infer homologous, exite is documented in the same position in members of the trilobite-allied Artiopoda. This early Cambrian exite morphology supplements an emerging picture from gene expression that exites may have a deeper origin in arthropod phylogeny than has been appreciated.
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