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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
Feb 2, 2005 · Our phylogenetic analysis of three protein-coding nuclear genes from 62 arthropods and lobopods (Onychophora and Tardigrada) demonstrates that Hexapoda is most closely related to the crustaceans Branchiopoda (fairy shrimp, water fleas, etc.) and Cephalocarida+Remipedia, thereby making hexapods terrestrial crustaceans and the traditionally defined Crustacea paraphyletic.
- Jerome C. Regier, Jeffrey W. Shultz, Robert E. Kambic
- 10.1098/rspb.2004.2917
- 2005
- 2005/02/02
- 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
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.
- Charles E Cook, Qiaoyun Yue, Michael Akam
- 10.1098/rspb.2004.3042
- 2005
- 2005/06/06
Mar 21, 2003 · Abstract. 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 ...
- Francesco Nardi, Giacomo Spinsanti, Jeffrey L. Boore, Antonio Carapelli, Romano Dallai, Francesco Fr...
- 2003
Apr 1, 2003 · Insecta (Zygentoma), and Gomphiocephalus. hodgsoni, another collembolan, to test sup-. port for the two competing hypotheses of a. monophyletic versus paraphyletic Hexapoda. An initial ...
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Is Hexapoda a paraphyletic phylum?
Mar 13, 2015 · Scientists now recognize two lineages within Protostomia that are Lophotrochozoa and Ecdysozoa (Halanych et. al, 1995). Hexapods can be found in the Ecdysozoan or molting insect lineage under the phylum Arthropoda (Tree of Life Web Project, 2002). Hexapoda are traditionally shown to be monophyletic or descended from one evolutionary group.
