Hexapod Origins: Monophyletic or Paraphyletic?

@article{Nardi2003HexapodOM,
  title={Hexapod Origins: Monophyletic or Paraphyletic?},
  author={Francesco Nardi and Giacomo Spinsanti and Jeffrey L. Boore and Antonio Carapelli and Romano Dallai and Francesco Frati},
  journal={Science},
  year={2003},
  volume={299},
  pages={1887 - 1889}
}
Recent morphological and molecular evidence has changed interpretations of arthropod phylogeny and evolution. Here we compare complete mitochondrial genomes to show that Collembola, a wingless group traditionally considered as basal to all insects, appears instead to constitute a separate evolutionary lineage that branched much earlier than the separation of many crustaceans and insects and independently adapted to life on land. Therefore, the taxon Hexapoda, as commonly defined to include all… 
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References

SHOWING 1-10 OF 17 REFERENCES
Mitochondrial protein phylogeny joins myriapods with chelicerates
TLDR
Molecular phylogenetic analysis of conserved regions from the arthropod mitochondrial proteome yields highly resolved and congruent trees and proposes a model to explain the apparently parallel evolution of similar head morphologies in insects and myriapods.
The Early Radiation and Relationships of the Major Arthropod Groups
TLDR
Cladistic analysis of characters of Cambrian and living representatives (excluding Uniramia) shows that trilobites and chelicerates are relatively advanced compared with "crustaceans," and there are doubts whether the latter constitute a national group.
Ribosomal DNA phylogeny of the major extant arthropod classes and the evolution of myriapods
TLDR
Using nuclear ribosomal gene sequences for constructing a molecular phylogeny, this work provides strong evidence that the crustaceans and not the myriapods should be considered to be the sister group of the insects.
Mitochondrial Genes Collectively Suggest the Paraphyly of Crustacea with Respect to Insecta
TLDR
A phylogenetic analysis using amino acid sequences of the seven corresponding polypeptides supports a sister-taxon status for mollusks–annelid and arthropods and suggests that crustaceans are paraphyletic with respect to insects.
A Review of Arthropod Phylogeny: New Data Based on Ribosomal DNA Sequences and Direct Character Optimization
TLDR
The high level of sequence heterogeneity in the 18S rRNA gene makes placement of certain taxa with “unusual” sequences difficult and underscores the necessity of combining ribosomal gene data with other sources of information.
Molecular phylogeny of the apterygotan insects based on nuclear and mitochondrial genes
TLDR
A fairly high support for the monophyly of the orders Diplura and Zygentoma is obtained in the 12S analysis, where the Ellipura and the Entognatha form monophyletic assemblages.
The phylogenetic interrelationships of the higher taxa of apterygote hexapods
TLDR
The phylogeny of the basal hexapods, the so‐called apterygote insects, was studied using parsimony analysis procedures and strongly support the monophyly of several orders and of two groupings.
The complete mitochondrial DNA sequence of the basal hexapod Tetrodontophora bielanensis: evidence for heteroplasmy and tRNA translocations.
TLDR
The complete 15,455-nt mitochondrial DNA sequence of the springtail Tetrodontophora bielanensis (Arthropoda, Hexapoda, Collembola), which shows the well-known A+T bias typical of insect mtDNA, and two tRNA translocations were found which were unprecedented among Arthropoda.
Phylogenetic analysis of arthropods using two nuclear protein–encoding genes supports a crustacean + hexapod clade
  • J. Shultz, J. C. Regier
  • Biology
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 2000
TLDR
Results from maximum–parsimony and maximum–likelihood analyses strongly supported the existence of a Crustacea+ Hexapoda clade (Pancrustacea) over a Myriapoda + Hexapod clade(s) (Atelocerata) and the apparent incompatibility between the molecule–based Pancrustacea hypothesis and morphology–based AtelOCerata hypothesis is discussed.
...
...