A Critical Appraisal of the Placement of Xiphosura (Chelicerata) with Account of Known Sources of Phylogenetic Error.

@article{Ballesteros2019ACA,
  title={A Critical Appraisal of the Placement of Xiphosura (Chelicerata) with Account of Known Sources of Phylogenetic Error.},
  author={Jes{\'u}s A. Ballesteros and Prashant P. Sharma},
  journal={Systematic biology},
  year={2019}
}
Horseshoe crabs (Xiphosura) are traditionally regarded as sister group to the clade of terrestrial chelicerates (Arachnida. [] Key Method We re-evaluated the placement of Xiphosura among chelicerates using the most complete phylogenetic data set to date, expanding outgroup sampling, and including data from whole genome sequencing projects. In spite of uncertainty in the placement of some arachnid clades, all analyses show Xiphosura consistently nested within Arachnida as the sister group to Ricinulei…
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References

SHOWING 1-10 OF 173 REFERENCES
Revised systematics of Palaeozoic ‘horseshoe crabs’ and the myth of monophyletic Xiphosura
TLDR
A number of other characters, including the form of the chelicerae and appendage VII, indicate that xiphosurans may be paraphyletic with respect to a clade consisting of chasmataspidids, eurypterids, and arachnids.
Phylogenomic interrogation of arachnida reveals systemic conflicts in phylogenetic signal.
TLDR
It is shown that phylogenetic signal for the monophyly of Arachnida is restricted to the 500 slowest-evolving genes in the data set, and that outgroup selection without regard for branch length distribution exacerbates long-branch attraction artifacts and does not mitigate gene-tree discordance, regardless of high gene representation for outgroups that are model organisms.
Horseshoe crab phylogeny and independent colonizations of fresh water: ecological invasion as a driver for morphological innovation
TLDR
A phylogenetic analysis of Xiphosurida is presented and horseshoe crabs are shown to have a more dynamic and complex evolutionary history than previously supposed, with the extant species representing only a fraction of the group's past ecological and morphological diversity.
Phylogenetic position of the acariform mites: sensitivity to homology assessment under total evidence
TLDR
The phylogenetic position of the acariform mites is examined through employing SSU, partial LSU sequences, and morphology from 91 chelicerate extant terminals, and morphological data matrices to evaluate the impact of constraining the analysis on the recovered topology when employing secondary structure as a guide for homology establishment.
Developmental gene expression as a phylogenetic data class: support for the monophyly of Arachnopulmonata
TLDR
It is shown that scorpions, like spiders, retain two copies of all four transcription factors required for appendage patterning, whereas arachnid orders like mites and harvestmen bear a single copy.
The Phylogeny of the Extant Chelicerate Orders
TLDR
The phylogeny of the extant chelicerate orders is examined in the light of morphological and molecular evidence, with the placement of solifugids and the status of the pedipalps responsible for most disagreement fairly robust to variation in analysis parameters.
Geological history and phylogeny of Chelicerata.
  • J. Dunlop
  • Geology, Biology
    Arthropod structure & development
  • 2010
Molecular phylogeny of acariform mites (Acari, Arachnida): strong conflict between phylogenetic signal and long-branch attraction artifacts.
First molecular phylogeny of the major clades of Pseudoscorpiones (Arthropoda: Chelicerata).
The book lungs of Scorpiones and Tetrapulmonata (Chelicerata, Arachnida): evidence for homology and a single terrestrialisation event of a common arachnid ancestor.
...
...