Deducing the pattern of arthropod phylogeny from mitochondrial DNA rearrangements

Article Abstract:

A comparison of the arrangement of genes in mitochondrial DNA of chelicerates, myriapods, crustaceans, onychophorans, molluscs and annelids provides evidence for the monophyly of Arthropoda and of Mandibulata, which includes atelocerates and crustaceans. The gene characteristics which do not support this monophyly are autapomorphic. None of the gene arrangements support the monophyly of Uniramia, which is atelocerates and onychophorans. Although all divergences do not correspond to mtDNA rearrangement, relationships can be predicted if the rearrangements are preserved.

Observations, Mitochondrial DNA

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Ribosomal DNA phylogeny of the major extant arthropod classes and the evolution of myriapods

Article Abstract:

A comparison of the nuclear ribosomal gene sequences of the four major groups in the anthropod phylogeny shows that insects are more closely related to crustaceans instead of myripods as supposed from morphological and paleontological data. The structure of the Malpighian tubules, ommatidia and mandibles of insects and crustaceans are similar while those of myriapods are different. Sequence divergence studies suggest that the divergence of myriapods from the arthropods occurred in the Cambrian era.

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Gene translocation links insects and crustaceans

Article Abstract:

It has been possible to identify a derived gene rearrangement common to insects and crustaceans but not present in other other arthropod groups. This finding gives substantial backing to an insect-crustacean evolutionary lineage that is independent of those leading to myriapods and chelicerates. Mitochondrial DNA sequence for Thyropygus and for three other myriapod species has show that these four myriapods share the gene arrangement LrRNA-L(CUN)-L(UUR)-ND1, which is almost definitely primitive.

Insects, Crustacea, Crustaceans

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