title: Diversification of New Zealand weta (Orthoptera: Ensifera: Anostostomatidae) and their relationships in Australasia.
abstract: New Zealand taxa from the Orthopteran family Anostostomatidae have been shown to consist of three broad groups, Hemiandrus (ground weta), Anisoura/Motuweta (tusked weta) and Hemideina-Deinacrida (tree-giant weta). The family is also present in Australia and New Caledonia, the nearest large land masses to New Zealand. All genera are endemic to their respective countries except Hemiandrus that occurs in New Zealand and Australia. We used nuclear and mitochondrial DNA sequence data to study within genera and among species-level genetic diversity within New Zealand and to examine phylogenetic relationships of taxa in Australasia. We found the Anostostomatidae to be monophyletic within Ensifera, and justifiably distinguished from the Stenopelmatidae among which they were formerly placed. However, the New Zealand Anostostomatidae are not monophyletic with respect to Australian and New Caledonian species in our analyses. Two of the New Zealand groups have closer allies in Australia and one in New Caledonia. We carried out maximum-likelihood and Bayesian analyses to reveal several well supported subgroupings. Our analysis included the most extensive sampling to date of Hemiandrus species and indicate that Australian and New Zealand Hemiandrus are not monophyletic. We used molecular dating approaches to test the plausibility of alternative biogeographic hypotheses for the origin of the New Zealand anostostomatid fauna and found support for divergence of the main clades at, or shortly after, Gondwanan break-up, and dispersal across the Tasman much more recently.
authors.affiliation: Allan Wilson Centre for Molecular Ecology and Evolution, Institute of Molecular Biosciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand. r.c.pratt@massey.ac.nz
authors.forename: Renae C
authors.initials: RC
authors.lastname: Pratt
authors.forename: Mary
authors.initials: M
authors.lastname: Morgan-Richards
authors.forename: Steve A
authors.initials: SA
authors.lastname: Trewick
mesh_terms: D000818:Animals; D044362:Australasia; D001483:Base Sequence; D001499:Bayes Theorem; D004272:DNA, Mitochondrial / Q000235:genetics; D003710:Demography; D014644:Genetic Variation; D005843:Geography; D016013:Likelihood Functions; D008957:Models, Genetic; D008969:Molecular Sequence Data; D009987:Orthoptera / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D004272:DNA, Mitochondrial
references.citation: Syst Biol. 2004 Oct;53(5):793-808
references.pmid: 15545256
references.citation: Mol Biol Evol. 1996 Mar;13(3):510-24
references.pmid: 8742640
references.citation: Mol Biol Evol. 2005 Jul;22(7):1561-8
references.pmid: 15814826
references.citation: Mol Phylogenet Evol. 2003 Aug;28(2):171-85
references.pmid: 12878457
references.citation: Syst Biol. 2006 Apr;55(2):351-6
references.pmid: 16611605
references.citation: PLoS Biol. 2006 May;4(5):e88
references.pmid: 16683862
references.citation: Nature. 2005 Jul 14;436(7048):183-4
references.pmid: 16015312
references.citation: Mol Ecol. 2004 Jun;13(6):1507-18
references.pmid: 15140094
references.citation: PLoS Biol. 2005 Jan;3(1):e14
references.pmid: 15660155
references.citation: Syst Biol. 2004 Apr;53(2):193-215
references.pmid: 15205049
references.citation: Proc Biol Sci. 2002 Feb 7;269(1488):235-41
references.pmid: 11839192
references.citation: Mol Mar Biol Biotechnol. 1994 Oct;3(5):294-9
references.pmid: 7881515
references.citation: Proc Biol Sci. 2005 Dec 7;272(1580):2535-44
references.pmid: 16271980
references.citation: Philos Trans R Soc Lond B Biol Sci. 2008 Oct 27;363(1508):3293-308
references.pmid: 18768382
references.citation: Philos Trans R Soc Lond B Biol Sci. 2008 Oct 27;363(1508):3309-17
references.pmid: 18765357
references.citation: Bioinformatics. 2001 Aug;17(8):754-5
references.pmid: 11524383
references.citation: Mol Phylogenet Evol. 2006 Feb;38(2):510-30
references.pmid: 16298145
references.citation: BMC Evol Biol. 2007 Nov 08;7:214
references.pmid: 17996036
references.citation: Proc Natl Acad Sci U S A. 2005 Jun 7;102(23):8257-62
references.pmid: 15928096
references.citation: Philos Trans R Soc Lond B Biol Sci. 2008 Oct 27;363(1508):3319-34
references.pmid: 18782728
references.citation: Mol Ecol. 2000 Jun;9(6):657-66
references.pmid: 10849282
references.citation: Syst Biol. 2003 Oct;52(5):696-704
references.pmid: 14530136
references.citation: Heredity (Edinb). 2001 Mar;86(Pt 3):303-12
references.pmid: 11488967
references.citation: Bioinformatics. 1998;14(9):817-8
references.pmid: 9918953
references.citation: Syst Biol. 1999 Jun;48(2):233-53
references.pmid: 12066707