ArticleNature2014
Hallucigenia's onychophoran-like claws and the case for Tactopoda.
Article in Nature, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.
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Who cites it
46 citing papers in PubMed.
- Quantifying Evolutionary Dynamics of Arthropodization and Arthrodization.BioEssays : news and reviews in molecular, cellular and developmental biology · 2026Review
- Single-cell sequencing reveals potential novel insights into appendage-patterning and joint-development in a spider.Developmental dynamics : an official publication of the American Association of Anatomists · 2026Article
- Polychaete annelids from the earliest Cambrian Period.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- The terminal Ediacaran Tongshan Lagerstätte from South China.Nature communications · 2025Article
- A fossilized ventral ganglion reveals a chaetognath affinity for Cambrian nectocaridids.Science advances · 2025Article
- A microscopic Burgess Shale: small carbonaceous fossils from a deeper water biota and the distribution of Cambrian non-mineralized faunas.Proceedings. Biological sciences · 2025Article
- CAT-Posterior Mean Site Frequencies Improves Phylogenetic Modeling Under Maximum Likelihood and Resolves Tardigrada as the Sister of Arthropoda Plus Onychophora.Genome biology and evolution · 2025Article
- Organ systems of a Cambrian euarthropod larva.Nature · 2024Article
- Cretaceous amber inclusions illuminate the evolutionary origin of tardigrades.Communications biology · 2024Article
- Molting in early Cambrian armored lobopodians.Communications biology · 2024Article
- Cambrian lobopodians shed light on the origin of the tardigrade body plan.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- A multiscale approach reveals elaborate circulatory system and intermittent heartbeat in velvet worms (Onychophora).Communications biology · 2023Article
- The unbearable uncertainty of panarthropod relationships.Biology letters · 2023Article
- Muscle systems and motility of early animals highlighted by cnidarians from the basal Cambrian.eLife · 2022Article
- The velvet worm brain unveils homologies and evolutionary novelties across panarthropods.BMC biology · 2022Article
- Extensive loss of Wnt genes in Tardigrada.BMC ecology and evolution · 2021Article
- New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte.Royal Society open science · 2021Article
- A new somasteroid from the Fezouata Lagerstätte in Morocco and the Early Ordovician origin of Asterozoa.Biology letters · 2021Article
- Ancestral morphology of Ecdysozoa constrained by an early Cambrian stem group ecdysozoan.BMC evolutionary biology · 2020Article
- Cuticular reticulation replicates the pattern of epidermal cells in lowermost Cambrian scalidophoran worms.Proceedings. Biological sciences · 2020Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Palaeozoic form-taxon Lobopodia encompasses a diverse range of soft-bodied 'legged worms' known from exceptional fossil deposits. Although lobopodians occupy a deep phylogenetic position within Panarthropoda, a shortage of derived characters obscures their evolutionary relationships with extant phyla (Onychophora, Tardigrada and Euarthropoda). Here we describe a complex feature in the terminal claws of the mid-Cambrian lobopodian Hallucigenia sparsa--their construction from a stack of constituent elements--and demonstrate that equivalent elements make up the jaws and claws of extant Onychophora. A cladistic analysis, informed by developmental data on panarthropod head segmentation, indicates that the stacked sclerite components in these two taxa are homologous-resolving hallucigeniid lobopodians as stem-group onychophorans. The results indicate a sister-group relationship between Tardigrada and Euarthropoda, adding palaeontological support to the neurological and musculoskeletal evidence uniting these disparate clades. These findings elucidate the evolutionary transformations that gave rise to the panarthropod phyla, and expound the lobopodian-like morphology of the ancestral panarthropod.
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