Hox genes and the phylogeny of the arthropods

@article{Cook2001HoxGA,
  title={Hox genes and the phylogeny of the arthropods},
  author={Charles E. Cook and M.Louise Smith and Maximilian J. Telford and Alberto Bastianello and Michael E Akam},
  journal={Current Biology},
  year={2001},
  volume={11},
  pages={759-763}
}

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...

References

SHOWING 1-10 OF 22 REFERENCES

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.

The phylogenetic status of arthropods, as inferred from 18S rRNA sequences.

TLDR
It is suggested that a previous study's inference of the Arthropoda as paraphyletic may be the result of having two few arthropod taxa available for analysis and including long-branched taxa, and that the evolutionary-parsimony method, like distance and parsimony, may be biased by taxa with long branches.

Hox genes in brachiopods and priapulids and protostome evolution

TLDR
It is shown that the complement of Hox genes in critical protostome phyla reflects these phylogenetic relationships and reveals the early evolution of developmental regulatory potential in bilaterians.

Molecules and the body plan: the Hox genes of Cirripedes (Crustacea).

TLDR
All eight homeotic homologue genes, including abdA, are found in Ulophysema oeresundense, a crustacean possessing a well-developed abdomen, belonging to the Ascothoracica, generally thought to be the sister group of Cirripedia.

First molecular evidence for the existence of a Tardigrada + Arthropoda clade.

TLDR
The results obtained represent the first molecular evidence for a Tardigrada + Arthropoda clade and indicate the need to review those obtained solely on morphological characters.

Molecular phylogeny of the major arthropod groups indicates polyphyly of crustaceans and a new hypothesis for the origin of hexapods.

TLDR
A phylogeny of the arthropods was inferred from analyses of amino acid sequences derived from the nuclear genes encoding elongation factor-1 alpha and the largest subunit of RNA polymerase II using maximum-parsimony, neighbor-joining, and maximum-likelihood methods, providing support for a Hexapoda/Branchiopoda clade, thus arguing against the monophyly of the traditionally defined Atelocerata.

Arthropod Cladistics: Combined Analysis of Histone H3 and U2 snRNA Sequences and Morphology

TLDR
The most parsimonious trees based on 211 non‐sequence characters (273 apomorphic states) support traditional higher taxa as clades, including Mandibulata, Crustacea, Atelocerata, Myriapoda, and Hexapoda and monophyly of Chelicerata is maintained under a range of transition/transversion and third codon weights.

Evidence from 12S ribosomal RNA sequences that onychophorans are modified arthropods.

TLDR
Parsimony analysis suggests that onychophorans form a sister group to chelicerates and crustaceans plus hexapods, but this relationship is not well supported by monophyly testing, which conflict with current hypotheses of evolutionary pathways within arthropods.

Deducing the pattern of arthropod phytogeny from mitochondrial DNA rearrangements

THE origins of arthropods and the phylogenetic relationships among their three major living groups (atelocerates, crustaceans and chelicerates) are vigorously contended. To help resolve this, we