ArticleDie Naturwissenschaften2014
Sanctacaris uncata: the oldest chelicerate (Arthropoda).
Article in Die Naturwissenschaften, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 56 citations in OpenAlex.
- Article
- Article
- Lower Ordovician synziphosurine reveals early euchelicerate diversity and evolution.Nature communications · 2024Article
- Functional importance of the mandibular skeleto-muscular system in the bivalved arthropod Heterocypris incongruens (Crustacea, Ostracoda, Cyprididae).Die Naturwissenschaften · 2022Article
- Before trilobite legs:Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022Article
- Neuroanatomy in a middle Cambrian mollisoniid and the ancestral nervous system organization of chelicerates.Nature communications · 2022Article
- A new Devonian euthycarcinoid reveals the use of different respiratory strategies during the marine-to-terrestrial transition in the myriapod lineage.Royal Society open science · 2020Article
- Revision of the mollisoniid chelicerate(?)PeerJ · 2020Article
- A Cambrian-Ordovician Terrestrialization of Arachnids.Frontiers in genetics · 2020Article
- Article
- Increasing species sampling in chelicerate genomic-scale datasets provides support for monophyly of Acari and Arachnida.Nature communications · 2019Article
- Homeosis in a scorpion supports a telopodal origin of pectines and components of the book lungs.BMC evolutionary biology · 2018Article
- Mandibulate convergence in an armoured Cambrian stem chelicerate.BMC evolutionary biology · 2017Article
- The Vicissicaudata revisited - insights from a new aglaspidid arthropod with caudal appendages from the Furongian of China.Scientific reports · 2017Article
- A molecular palaeobiological exploration of arthropod terrestrialization.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2016Review
- Tiny individuals attached to a new Silurian arthropod suggest a unique mode of brood care.Proceedings of the National Academy of Sciences of the United States of America · 2016Article
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1 author at 1 institution in 1 country.
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Abstract
The morphology of the arthropod Sanctacaris uncata, from the Middle Cambrian Burgess Shale of Canada, is reinterpreted based on a restudy of previously described material. Although originally considered a chelicerate-like arthropod, these affinities were dismissed based primarily on interpretations of the anterior appendages and hypotheses which considered the megacheirans ('great-appendage' arthropods) as putative ancestors of chelicerates. The similarities between megacheirans and chelicerates appear to be overstated however, and this study instead reaffirms the identity of putative chelicerate feature in S. uncata and similar arthropods such as Sidneyia and Emeraldella, both also from the Middle Cambrian Burgess Shale. Newly interpreted features, including the presence of pediform exites, multi-partite trunk exopods, and a trunk differentiated into an anterior limb-bearing area and a differentiated posterior limbless abdomen, were coded into an extensive phylogenetic data set of fossil and recent arthropods. In all analyses, Sanctacaris resolved as the basal-most member of total-group Euchelicerata (the least inclusive group including horseshoe crabs and arachnids but not pycnogonids), thus making it the oldest chelicerate in the fossil record. The vicissicaudates (including Sidneyia, Emeraldella, aglaspidids, and cheloniellids--all of which have previously been allied to chelicerates) resolved as sister-taxon to crown-group Chelicerata. This topology indicates that many purported chelicerate features, such as lamellar gills, and a differentiated posterior abdomen evolved sequentially in the chelicerate stem-lineage.
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