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Mar 21, 2003 · It has long been held that hexapods (7) constitute a monophyletic taxon (8, 9) and that their closest relatives are to be found in myriapods (10). More recently, molecular and developmental studies have rejected this relationship (3–5, 11, 12) in favor of a closer affinity between Hexapoda and Crustacea (Pancrustacea or Tetraconata).
- Francesco Nardi, Giacomo Spinsanti, Jeffrey L. Boore, Antonio Carapelli, Romano Dallai, Francesco Fr...
- 2003
May 21, 2024 · Hexapods, subphylum Hexapoda, is a group of arthropods that includes the insects and some close relatives, including springtails, proturans, and diplurans. Hexapods are probably monophyletic, meaning they all descend from a common ancestor, and include no members that didn't descend from that ancestor. However, there is some evidence that ...
Pancrustacea is the clade that comprises all crustaceans, and all hexapods (insects and relatives). [2] This grouping is contrary to the Atelocerata hypothesis, in which Hexapoda and Myriapoda are sister taxa, and Crustacea are only more distantly related. As of 2010, the Pancrustacea taxon was considered well accepted, with most studies ...
- Sequence and Alignment Dataset
- Phylogeny Inferred from The Complete Dataset
- Phylogeny Inferred from Selected Datasets
In this study, the nuclear genes encoding DPD1, RPB1, and RPB2 were amplified and sequenced in 14 arthropods, which consisted of six species of Entognatha (one dipluran, three collembolans, and two proturans), six species of Crustacea (three branchiopods, two malacostracans, and one maxillopodan), one myriapod, and one chelicerate (Additional file ...
Before performing phylogenetic analyses using the concatenated alignment, we performed separate analyses based on the alignments of the individual genes to detect whether there were significant discrepancies among the tree topologies. Although some discrepancies were found in the tree topologies, the nodes representing the incongruent relationships...
To confirm the above findings, further phylogenetic analyses were performed using three selected datasets that were modified from the original by either excluding long-branch taxa, using crustaceans as an outgroup, or excluding collembolans. The ML tree shown in Figure 2 contained several visually long branches, corresponding to Drosophila melanoga...
- Go Sasaki, Keisuke Ishiwata, Keisuke Ishiwata, Ryuichiro Machida, Takashi Miyata, Zhi-Hui Su
- 2013
Feb 2, 2005 · The three non-hexapod classes in clade 33—Branchiopoda, Cephalocarida, Remipedia—have each been regarded as the ‘most primitive’ and most basal crustaceans by a subset of workers (see Martin & Davis 2001), a debate driven, in part, by carcinology’s somewhat anachronistic search for the ‘Ur-crustacean’. By contrast, our analyses show that these lineages are phylogenetically ...
- Jerome C. Regier, Jeffrey W. Shultz, Robert E. Kambic
- 10.1098/rspb.2004.2917
- 2005
- 2005/02/02
Mar 13, 2015 · Despite these limitations, molecular clock data has supported the idea of Hexapods being a monophyletic group, and even helped to confirm previous hypotheses about the close relation between Hexapoda and Crustacea (Misof et. al, 2014). Key Evolutionary Innovations of Hexapods Hexapods are one of the most diverse classes in the animal kingdom.
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Jun 6, 2005 · In no trees were either the crustaceans or hexapods (Collembola and Insecta sensu stricto) monophyletic. To test the robustness of these results we found the best tree for the dataset using the iterative method described above under three constraints: that the Hexapoda are monophyletic, that the Crustacea are monophyletic and that both hexapods and crustaceans are monophyletic.
