Cambrian origins and affinities of an enigmatic fossil group of arthropods

@article{Vaccari2004CambrianOA,
  title={Cambrian origins and affinities of an enigmatic fossil group of arthropods},
  author={N. E. Vaccari and G. Edgecombe and C. Escudero},
  journal={Nature},
  year={2004},
  volume={430},
  pages={554-557}
}
Euthycarcinoids are one of the most enigmatic arthropod groups, having been assigned to nearly all major clades of Arthropoda. Recent work has endorsed closest relationships with crustaceans or a myriapod–hexapod assemblage, a basal position in the Euarthropoda, or a placement in the Hexapoda or hexapod stem group. Euthycarcinoids are known from 13 species ranging in age from Late Ordovician or Early Silurian to Middle Triassic, all in freshwater or brackish water environments. Here we describe… Expand
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References

SHOWING 1-10 OF 20 REFERENCES
A euthycarcinoid arthropod from the Silurian of Western Australia
TLDR
The discovery of a euthycarcinoid about 120 million years older than the previous oldest record, and predating the oldest known hexapod, provides strong support for the view that the hexapods may have evolved from the EuthycARCinoidea. Expand
The mitochondrial genome of the house centipede scutigera and the monophyly versus paraphyly of myriapods.
TLDR
It is suggested that water-to-land transition occurred at least three times (hexapods, myriapods) during the evolution of the Arthropoda, which would increase to four the main events of land colonization in arthropods (once for centipedes, once for millipedes). Expand
The Tetraconata concept: hexapod-crustacean relationships and the phylogeny of Crustacea
TLDR
Arguments for homology of the mandible throughout mandibulate arthropods and for a monophyletic Mandibulata will be presented, as well as arguments supporting the taxon Tetraconata (i.e. Crustacea + Hexapoda). Expand
An Early Devonian arthropod fauna from the Windyfield cherts, Aberdeenshire, Scotland
TLDR
Chert texture, faunal associations, and study of modern analogues strongly suggest that the terrestrial arthropods were ubiquitous Early Devonian forms with no particular special adaptation to localized conditions around the terrestrial hot-spring vents. Expand
Synaustrus and the euthycarcinoid puzzle
TLDR
Sternal pores in euthycarcinoids resemble coxal vesicles, though this conflicts with other morphological indications of aquatic habits, and the evidence presented here allies euthyCarcinoid with atelocerates, but they cannot be positioned higher than the stem-lineage of Atelocers. Expand
Arthropods invade the land: trace fossils and palaeoenvironments of the Tumblagooda Sandstone (?late Silurian) of Kalbarri, Western Australia
The trace fossils of the Tumblagooda Sandstone (?late Silurian) of Kalbarri, Western Australia are spectacular in their variety and preservation. They provide a unique insight into the activities ofExpand
New Euthycarcinoids and an Enigmatic Arthropod from the British Coal Measures
TLDR
Two new species of euthycarcinoids (Arthropoda) are described from the Coal Measures of Westhoughton, Lancashire and Coseley, West Midlands (Westphalian A and B respectively). Expand
Ecdysozoan phylogeny and Bayesian inference: first use of nearly complete 28S and 18S rRNA gene sequences to classify the arthropods and their kin.
TLDR
Better taxonomic resolution and recovery of established taxa were obtained here, especially with Bayesian inference, than in previous parsimony-based studies that used 18S rRNA sequences, and should revive interest in using rRNA genes to study arthropod and ecdysozoan relationships. Expand
First steps on land: Arthropod trackways in Cambrian-Ordovician eolian sandstone, southeastern Ontario, Canada
Basal terrestrial deposits in the Cambrian-Ordovician Nepean Formation (Potsdam Group) near Kingston, Ontario, contain arthropod-produced trackways that extend the record of the first arthropodExpand
Sedimentary facies, depositional evolution of the Upper Cambrian-Lower Ordovician Santa Rosita formation in northwest Argentina
Abstract The Upper Cambrian–Tremadocian Santa Rosita Formation, the lowermost unit of the Santa Victoria Group in northwest Argentina, records part of the infill of a retroarc basin. Sedimentologic,Expand
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