eCite Digital Repository

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

Citation

Munasinghe, DHN and Burridge, CP and Austin, CM, 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 , 18, (2) pp. 215-225. ISSN 1445-5226 (2004) [Refereed Article]


Preview
PDF
Restricted - Request a copy
328Kb
  

Copyright Statement

Copyright 2004 CSIRO

Official URL: http://www.publish.csiro.au

DOI: doi:10.1071/IS03012

Abstract

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

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Evolutionary Biology
Research Field:Animal Systematics and Taxonomy
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Fresh, Ground and Surface Water Flora, Fauna and Biodiversity
Author:Burridge, CP (Dr Christopher Burridge)
ID Code:59371
Year Published:2004
Web of Science® Times Cited:12
Deposited By:Zoology
Deposited On:2009-11-30
Last Modified:2009-12-01
Downloads:2 View Download Statistics

Repository Staff Only: item control page