Extensive Phylogeographic and Morphological Diversity in Diporiphora nobbi (Agamidae) Leads to a Taxonomic Review and a New Species Description

Edwards, Danielle L.; Melville, Jane

doi:10.1670/10-115.1

Cited by 15 publications

(13 citation statements)

References 45 publications

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“…Specific beast settings for these calibrations are as per table 3 in Melville et al (2011). In addition, we added a minimum age estimate for the ingroup of Australian amphibolurine species, with a fossil of the Physignathus lesueurii lineage, of 20 Ma (Covacevich et al, 1990) with beast settings detailed in Edwards & Melville (2011). The analysis was run for 20 million generations using a GTR+I+Г model of evolution with a Speciation: Yule Process tree prior and a random starting tree.…”

Section: Divergence Times Estimatesmentioning

confidence: 99%

Concordance in phylogeography and ecological niche modelling identify dispersal corridors for reptiles in arid Australia

Melville

Haines

Hale

et al. 2016

Journal of Biogeography

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Aim Using the rock‐specialist agamid Ctenophorus caudicinctus as a model, we test hypothesized biogeographical dispersal corridors for lizards in the Australian arid zone (across the western sand deserts), and assess how these dispersal routes have shaped phylogeographical structuring. Location Arid and semi‐arid Australia. Methods We sequenced a c. 1400 bp fragment of mtDNA (ND2) for 134 individuals of C. caudicinctus as well as a subset of each of the mtDNA clades for five nuclear loci (BDNF, BACH1, GAPD, NTF3, and PRLR). We used phylogenetic methods to assess biogeographical patterns within C. caudicinctus, including relaxed molecular clock analyses to estimate divergence times. Ecological niche modelling (Maxent) was employed to estimate the current distribution of suitable climatic envelopes for each lineage. Results Phylogenetic analyses identified two deeply divergent mtDNA clades within C. caudicinctus – an eastern and western clade – separated by the Western Australian sand deserts. However, divergences pre‐date the Pleistocene sand deserts. Phylogenetic analyses of the nuclear DNA data sets generally support major mtDNA clades, suggesting past connections between the western C. c. caudicinctus populations in far eastern Pilbara (EP) and the lineages to the east of the sand deserts. Ecological niche modelling supports the continued suitability of climatic conditions between the Central Ranges and the far EP for C. c. graafi. Main conclusions Estimates of lineage ages provide evidence of divergence between eastern and western clades during the Miocene with subsequent secondary contact during the Pliocene. Our results suggest that this secondary contact occurred via dispersal between the Central Ranges and the far EP, rather than the more southerly Giles Corridor. These events precede the origins of the western sand deserts and divergence patterns instead appear associated with Miocene and Pliocene climate change.

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Section: Divergence Times Estimatesmentioning

confidence: 99%

Concordance in phylogeography and ecological niche modelling identify dispersal corridors for reptiles in arid Australia

Melville

Haines

Hale

et al. 2016

Journal of Biogeography

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“…This species is only known from the type specimen, which was collected from Crystal Creek in the northern tip of the Kimberley (Storr, 1974) and has not been collected again. Taxonomic treatments of D. nobbi (Witten), D. phaeospinosa Edwards and Melville or D. pindan Storr are also not provided because they have been recently treated elsewhere (Doughty et al, 2012a;Edwards and Melville, 2011).…”

Section: Specimens Examined and External Morphologymentioning

confidence: 99%

“…Diporiphora australis (Steindachner, 1867) Diporiphora jugularis (Macleay, 1877) Diporiphora nobbi (Witten, 1972) Diporiphora phaeospinosa Edwards and Melville, 2011 Diagnostic characters for group (Table 2):…”

Section: Contentmentioning

confidence: 99%

“…Relative to other species groups in the AMT, they tend to be large bodied (68-75 mm SVL) with generalist habits. We do not include D. nobbi and D. phaeospinosa below because Edwards and Melville (2011) recently reviewed these species. Our analyses of all Diporiphora species ( fig.…”

Section: Remarksmentioning

confidence: 99%

“…The last significant taxonomic treatment of Diporiphora in this region of northern Australia was published more than 40 years ago, describing eight species and subspecies (Storr, 1974). More recently, genetic work has shown that the current taxonomy significant under-represents the true species diversity (Couper et al, 2012;Edwards and Melville, 2011;Smith et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Taxonomic revision of dragon lizards in the genus Diporiphora (Reptilia: Agamidae) from the Australian monsoonal tropics

Melville

Date

Horner³

et al. 2019

Mem. Mus. Vic.

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The Australian dragon lizard genus Diporiphora currently comprises 21 species based on genetic and morphological evidence, with 11 of these species occurring in the monsoonal tropics of northern Australia. Diporiphora are climbing lizards that are found on either trees, grasses or rocks, with usually only subtle morphological differences to distinguish between species. Since the last taxonomic treatment of this genus in northern Australia over 40 years ago, species delimitation using genetic techniques has clarified the number of lineages and increased collections from recent surveys have significantly broadened the distributions of these taxa. However, no formal taxonomic assessments have been undertaken to redefine species, including the many lineages that represent undescribed species. Currently, there are seven species of Diporiphora with vast distributions across northern Australia and a broad and variable set of morphological characteristics that make species identification challenging, even for experienced field workers. Here, we provide a comprehensive taxonomic treatment of Diporiphora species across northern Australia based on previously published genetic data and morphological examination of voucher specimens. Our analyses demonstrate that these broadly distributed taxa actually comprise multiple, often allopatric, species, with especially high diversity in the Kimberley region of Western Australia. We redescribe nine previously described species and describe five new species of Diporiphora based on historical types, newly collected material and older museum vouchers. In the D. australis species group, we resurrect D. jugularis Macleay from synonomy. In the D. bennettii species group, we synonomise D. arnhemica Storr with D. albilabris Storr, and raise to full species the latter and D. sobria Storr. In addition, we describe as new a wide-ranging saxicoline species previously attributed to D. bennettii Gray. In the D. bilineata species group, we resurrect D. margaretae Storr from synonomy with D. magna Storr and describe three new species. Lastly, we describe a species from the northwest Kimberley that is more closely related to an arid zone radiation. The revision of the northern Diporiphora dragons here stabilises the taxonomy, redefines many species distributions and reveals many new species. Further work on Diporiphora includes further surveys to better understand distributions and habitat preferences and continue to refine their evolutionary history and biogeography in northern Australia.

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Byrne¹,

Joseph²,

Roberts³

et al. 2018

On the Ecology of Australia’s Arid Zone

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Extensive Phylogeographic and Morphological Diversity in Diporiphora nobbi (Agamidae) Leads to a Taxonomic Review and a New Species Description

Cited by 15 publications

References 45 publications

Concordance in phylogeography and ecological niche modelling identify dispersal corridors for reptiles in arid Australia

Concordance in phylogeography and ecological niche modelling identify dispersal corridors for reptiles in arid Australia

Taxonomic revision of dragon lizards in the genus Diporiphora (Reptilia: Agamidae) from the Australian monsoonal tropics

Evolutionary History

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