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. Emilio Vaccari and Gregory D. 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… 

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