Journal ArticleDOI
The phylogenetic position of early hexapod lineages: morphological data contradict molecular data
TLDR
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.Abstract:
. A review of different studies on the phylogenetic relationships of the early Hexapoda lineages shows that analyses based on molecular sequence data have led to labile and sometimes incongruous results, introducing doubt as to the reliability of the cladograms as a whole. In a recent analysis using molecular data, the Collembola, usually considered as early branching hexapods, appear to occupy a position outside the assemblage of Crustacea and Insecta, leading to the rejection of the traditional view of hexapod monophyly. However, many morphological features, as well as the results of cladistic analyses based on morphological and developmental information, contradict these conclusions. More generally, 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.read more
Citations
More filters
Museum national d'histoire naturelle
TL;DR: The observed changes associated with molting were less significant than initially expected, and are not likely to be strong enough to mislead the practitioner.
Journal ArticleDOI
Organization and evolutionary trends of primary olfactory brain centers in Tetraconata (Crustacea+Hexapoda)
TL;DR: It is concluded that an olfactory lobe organized into spheroidal glomeruli is a plesiomorphic character of the tetraconate brain.
Journal Article
A revised interpretation of the evolution of attachment structures in Hexapoda with special emphasis on Mantophasmatodea
Rolf G. Beutel,Stanislav N. Gorb +1 more
TL;DR: Characters of hexapod attachment structures were analysed cladistically together with 110 additional morphological characters of immatures and adults and suggest the monophyly of Hexapoda, Ellipura, Diplura + Ectognatha, and Dicondylia is suggested.
Journal ArticleDOI
Phylogenetic analysis of mitochondrial protein coding genes confirms the reciprocal paraphyly of Hexapoda and Crustacea.
TL;DR: The finding of the reciprocal paraphyly of Hexapoda and Crustacea suggests an evolutionary scenario in which the acquisition of the hexapod condition may have occurred several times independently in lineages descending from different crustacean-like ancestors, possibly as a consequence of the process of terrestrialization.
Journal ArticleDOI
Mitochondrial genome data alone are not enough to unambiguously resolve the relationships of Entognatha, Insecta and Crustacea sensu lato (Arthropoda)
TL;DR: It is concluded that the relationships of the extant arthropod groups as inferred by mitochondrial genomes are highly vulnerable to outgroup choice, data treatment and gene choice, and no consistent alternative hypothesis of Collembola's relationships is supported.
References
More filters
Journal ArticleDOI
Testing significance of incongruence
Journal ArticleDOI
A Concern for Evidence and a Phylogenetic Hypothesis of Relationships among Epicrates (Boidae, Serpentes)
TL;DR: High levels of character congruence were observed among 89 biochemical and morphological synapomorphies scored on 10 species of Epicrates, and the consensus cladogram was consistent with the phylogenetic interpretation attached to the resulting hypothesis, which is a consensus of two equally parsimonious cladograms.
Journal ArticleDOI
Histone H3 and U2 snRNA DNA sequences and arthropod molecular evolution
Donald J. Colgan,A. McLauchlan,George S. Wilson,S. P. Livingston,Gregory D. Edgecombe,J. Macaranas,Gerasimos Cassis,Michael R. Gray +7 more
TL;DR: Combined (‘spliced’) analysis of both genes improves topological congruence with morphological groupings relative to that of either partition, suggesting that the class of snRNAs may provide several phylogenetically useful genes.