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Evolution underground: A molecular phylogenetic investigation of Australian burrowing freshwater crayfish (Decapoda: Parastacidae) with particular focus on Engaeus Erichson

journal contribution
posted on 2009-03-01, 00:00 authored by M B Schultz, S A Smith, P Horwitz, A M M Richardson, K A Crandall, Chris AustinChris Austin
Phylogenetic relationships and species boundaries of Australian burrowing freshwater crayfish belonging to the genera Engaeus, Engaewa, Geocharax, Gramastacus and Tenuibranchiurus are investigated using combined mitochondrial and nuclear DNA sequence data and Bayesian and Maximum Parsimony methods. Phylogenies are statistically compared to previously published hypotheses. Engaeus, Engaewa, Geocharax, Gramastacus and Tenuibranchiurus form a strongly supported monophyletic clade. This grouping is independently supported by morphology but unites geographically highly disjunct lineages. Our data show two cryptic species in Geocharax, one cryptic species in Gramastacus and two cryptic species within the highly divergent Engaeus lyelli lineage. Using a Bayesian relaxed molecular clock method, the 16S rDNA data show generic-level diversification coinciding with the transition from a wet to arid palaeoclimate near the mid Miocene. © 2008 Elsevier Inc. All rights reserved.

History

Journal

Molecular Phylogenetics and Evolution

Volume

50

Issue

3

Pagination

580 - 598

ISSN

1055-7903

eISSN

1095-9513

Publication classification

C Journal article; C1.1 Refereed article in a scholarly journal

Copyright notice

2008, Elsevier