The position of arthropods in the animal kingdom: Ecdysozoa, islands, trees, and the "Parsimony ratchet".

@article{Giribet1999ThePO,
  title={The position of arthropods in the animal kingdom: Ecdysozoa, islands, trees, and the "Parsimony ratchet".},
  author={Gonzalo Giribet and Ward C. Wheeler},
  journal={Molecular phylogenetics and evolution},
  year={1999},
  volume={13 3},
  pages={
          619-23
        }
}
In a recent paper published in Molecular Phylogenetcs and Evolution, Giribet and Ribera (1998) placed rthropods within the Animal kingdom by analyzing he 18S rDNA locus of 133 metazoan taxa. The goal of hat paper was twofold: (1) to investigate the position of he Arthropoda within the protostome animals and (2) o determine arthropod sister-group relationships. Seuence data were analyzed by means of unweighted arsimony (gaps coded as a character state) in NONA .5.1 (Goloboff, 1993) using… Expand
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