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The systematics of freshwater crayfish of the genus Cherax Erichson (Decapoda : Parastacidae) in eastern Australia re-examined using nucleotide sequences from 12S rRNA and 16S rRNA genes

Munasinghe, D. H. N., Burridge, C. P. and Austin, Christopher 2004, The systematics of freshwater crayfish of the genus Cherax Erichson (Decapoda : Parastacidae) in eastern Australia re-examined using nucleotide sequences from 12S rRNA and 16S rRNA genes, Invertebrate systematics, vol. 18, no. 2, pp. 215-225, doi: 10.1071/IS03012.

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Title The systematics of freshwater crayfish of the genus Cherax Erichson (Decapoda : Parastacidae) in eastern Australia re-examined using nucleotide sequences from 12S rRNA and 16S rRNA genes
Author(s) Munasinghe, D. H. N.
Burridge, C. P.
Austin, ChristopherORCID iD for Austin, Christopher orcid.org/0000-0003-1848-6267
Journal name Invertebrate systematics
Volume number 18
Issue number 2
Start page 215
End page 225
Publisher Commonwealth Scientific and Industrial Research Organization
Place of publication Collingwood, Vic.
Publication date 2004
ISSN 1445-5226
1447-2600
Summary Nucleotide sequence data were used to re-examine systematic relationships and species boundaries within the genus Cherax from eastern Australia. Partial sequences were amplified from the 12S (~365 bp) and 16S (~545 bp) rRNA mitochondrial gene regions. Levels of intra- and inter-specific divergence for Cherax species were very similar between the two gene regions and similar to that reported for other freshwater crayfish for 16S rRNA. Phylogenetic analyses using the combined data provided strong support for a monophyletic group containing 11 eastern Australian species and comprising three well-defined species-groups: the 'C. destructor' group containing three species, the 'C. cairnsensis' group containing four species and the 'C. cuspidatus' group containing two species. Cherax dispar and C. robustus are distinct from all other species and each other. In addition, two northern Australian and a New Guinean species were placed in the 'Astaconephrops' group, which is the sister-group to the eastern Australian Cherax lineage. Several relationships were clarified, including: the status of northern and southern C. cuspidatus as separate species; a close relationship between C. cairnsensis and C. depressus; the validity of C. rotundus and C. setosus as separate species and their close affinities with C. destructor; and the distinctiveness of the northern forms of Cherax. The analysis of the 12S rRNA and 16S rRNA data is highly concordant with the results of previous allozyme studies.
Language eng
DOI 10.1071/IS03012
Field of Research 060399 Evolutionary Biology not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©CSIRO, 2004
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002622

Document type: Journal Article
Collection: School of Ecology and Environment
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