Comment on "Hexapod Origins: Monophyletic or Paraphyletic?"

  title={Comment on "Hexapod Origins: Monophyletic or Paraphyletic?"},
  author={Fr{\'e}d{\'e}ric Delsuc and Matthew J. Phillips and David Penny},
  pages={1482 - 1482}
Nardi et al. ( [1][1] ) suggested, rather cautiously, that hexapods (insects plus collembolans in their data set) might be a diphyletic rather than a monophyletic group. According to their interpretation, collembolans evolved separately from other insects and emerged before crustaceans. This 

Of mites and millipedes: Recent progress in resolving the base of the arthropod tree

  • J. CaravasM. Friedrich
  • Biology
    BioEssays : news and reviews in molecular, cellular and developmental biology
  • 2010
The progress, problems, and prospects of arriving at the final arthropod tree are discussed.

The phylogenetic position of early hexapod lineages: morphological data contradict molecular data

It appears that in the present state of the analytical strategies, hypotheses concerning arthropod phylogenies obtained from morphological and developmental criteria and combined analyses involving molecular and morphological data provide more reliable results than those generated by molecular information alone.

Phylogenetic relationships of basal hexapods among the mandibulate arthropods: a cladistic analysis based on comparative morphological characters

The results support the monophyly of the Mandibulata, Crustacea, Atelocerata (Tracheata) and Hexapoda, but the assemblage of Myriapoda appears poorly supported.

The evolution of the Ecdysozoa

The evidence that now conclusively supports the unique origin of these phyla is reviewed and the molecular and morphological evidence for a number of monophyletic groups within this superphylum is discussed.

A molecular palaeobiological exploration of arthropod terrestrialization The this article available.

Citation Lozano-Fernandez, Jesus, Robert Carton, Alastair R. Tanner, Mark N. Puttick, Mark Blaxter, Jakob Vinther, Jørgen Olesen, Gonzalo Giribet, Gregory D. Edgecombe, and Davide Pisani. 2016. “A

The phylogenetic positions of three Basal-hexapod groups (protura, diplura, and collembola) based on ribosomal RNA gene sequences.

This study combined complete 18S with partial 28S ribosomal RNA gene sequences to investigate the relations of basal hexapods, and found data are consistent with hexapod monophyly and Collembola grouped weakly with "Protura + Diplura" under most analytical conditions.

Relaxed phylogenetics and the palaeoptera problem: resolving deep ancestral splits in the insect phylogeny.

A systematic reinvestigation of the basal pterygote split is presented and methods that exploit temporal information using fossil calibrations, combined with additional assumptions about the evolutionary process, are shown to provide more consistent results, for example, supporting Palaeoptera, even for data sets that previously supported other hypotheses.



Wingless Insects and Plucked Chickens

Enter [Nardi and colleagues], whose mitochondrial genome sequence data throw "a naked fowl" into the midst of consensus, as [Thomas][2] describes in an accompanying Perspective.

Arthropod phylogeny based on eight molecular loci and morphology

The optimal ‘total evidence’ cladogram supports the crustacean–hexapod clade, recognizes pycnogonids as sister to other euarthropods, and indicates monophyly of Myriapoda and Mandibulata.

Four new mitochondrial genomes and the increased stability of evolutionary trees of mammals from improved taxon sampling.

The evolutionary tree for mammals is expected to be resolved quickly, and the stability of trees from independent data sets, as detected from a triplet Markov analysis.

Outgroup misplacement and phylogenetic inaccuracy under a molecular clock--a simulation study.

A simulation study of the phylogenetic methods UPGMA, neighbor joining, maximum parsimony, and maximum likelihood for a five-taxon tree under a molecular clock identified another region of the parameter space where, although consistent for a given method, some incorrect trees were each selected with up to twice the frequency of the correct tree for sequences of bounded length.

Should we use model-based methods for phylogenetic inference when we know that assumptions about among-site rate variation and nucleotide substitution pattern are violated?

Results suggest that application of increasingly general and complex models would sometimes lead to decreased efŽciency, despite the fact that themore complex models almost always provide signiŽcantly better access to real data than the simpler models.

MrBayes 3: Bayesian phylogenetic inference under mixed models

MrBayes 3 performs Bayesian phylogenetic analysis combining information from different data partitions or subsets evolving under different stochastic evolutionary models to analyze heterogeneous data sets and explore a wide variety of structured models mixing partition-unique and shared parameters.

Increased taxon sampling greatly reduces phylogenetic error.

The measurement of phylogenetic error across a wide range of taxon sample sizes is considered, and it is concluded that the expected error based on randomly selecting trees must be considered in evaluating error in studies of the effects ofTaxon sampling.

Compositional Bias May Affect Both DNA-Based and Protein-Based Phylogenetic Reconstructions

It is reported that DNA bias not only may affect phylogenetic analysis based on DNA sequences, but also drives a protein bias which may affect analyses based on protein sequences, and that even protein-based phylogenetic trees may be misleading.

MODELTEST: testing the model of DNA substitution

SUMMARY The program MODELTEST uses log likelihood scores to establish the model of DNA evolution that best fits the data. AVAILABILITY The MODELTEST package, including the source code and some