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A preliminary examination of the molecular relationships of some crayfish species from the genus Parastacoides (Decapoda: Parastacidae)
Hansen B and Smolenski A 
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Abstract
In a preliminary study into the molecular phylogenetic relationships of a sub-group of species of the freshwater crayfish genus Parastacoides, mitochondrial sequence data were obtained using polymerase chain reaction and direct sequencing techniques from specimens representing five proposed new species. The taxonomic status of Parastacoides is in a state of flux; these data were used to examine the evidence for speciation, and the systematic relationships of the putative species. A 693 base pair section of the cytochrome oxidase I (COI) gene was sequenced. Corrected pairwise distances were large, suggesting that the Parastacoides species group is more ancient than previously thought, therefore a more conserved region of the mitochondrial genome may be more appropriate for further analyses. Phylogenetic reconstruction suggests a major division within Parastacoides species.
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Hansen B and Smolenski A. (2002). A preliminary examination of the molecular relationships of some crayfish species from the genus Parastacoides (Decapoda: Parastacidae). Freshwater Crayfish 13(1):547-554. doi:
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