Limits...
Independent Transitions between Monsoonal and Arid Biomes Revealed by Systematic Revison of a Complex of Australian Geckos (Diplodactylus; Diplodactylidae).

Oliver PM, Couper PJ, Pepper M - PLoS ONE (2014)

Bottom Line: Here, we use molecular genetics and morphological data to investigate the systematics and biogeography of a nominal Australian gecko species (Diplodactylus conspicillatus sensu lato) with a wide distribution spanning most of the Australian Arid Zone (AAZ) and Monsoonal Tropics (AMT).Our inferred phylogeny suggests the history and diversification of lineages in the AAZ and AMT are intimately linked, with evidence of multiple independent interchanges since the late Miocene.However, despite this shared history, related lineages in these two regions also show evidence of broadly contrasting intra-regional responses to aridification; vicarance and speciation in older and increasingly attenuated mesic regions, versus a more dynamic history including independent colonisations and recent range expansions in the younger AAZ.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, University of Melbourne, Melbourne, Victoria, Australia; Department of Sciences, Museum Victoria, Melbourne, Victoria, Australia; Division of Evolution, Ecology & Genetics, Research School of Biology, The Australian National University, Canberra, Australian Captital Territory, Australia.

ABSTRACT
How the widespread expansion and intensification of aridity through the Neogene has shaped the Austral biota is a major question in Antipodean biogeography. Lineages distributed across wide aridity gradients provide opportunities to examine the timing, frequency, and direction of transitions between arid and mesic regions. Here, we use molecular genetics and morphological data to investigate the systematics and biogeography of a nominal Australian gecko species (Diplodactylus conspicillatus sensu lato) with a wide distribution spanning most of the Australian Arid Zone (AAZ) and Monsoonal Tropics (AMT). Our data support a minimum of seven genetically distinct and morphologically diagnosable taxa; we thus redefine the type species, ressurrect three names from synonymy, and describe three new species. Our inferred phylogeny suggests the history and diversification of lineages in the AAZ and AMT are intimately linked, with evidence of multiple independent interchanges since the late Miocene. However, despite this shared history, related lineages in these two regions also show evidence of broadly contrasting intra-regional responses to aridification; vicarance and speciation in older and increasingly attenuated mesic regions, versus a more dynamic history including independent colonisations and recent range expansions in the younger AAZ.

No MeSH data available.


Related in: MedlinePlus

Holotype of D. custos sp. nov. (WAM R164780).The Grotto, Western Australia. (Image: Peter Waddington, QM).
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4262211&req=5

pone.0111895.g014: Holotype of D. custos sp. nov. (WAM R164780).The Grotto, Western Australia. (Image: Peter Waddington, QM).

Mentions: Figs. 6F, 7H, 14


Independent Transitions between Monsoonal and Arid Biomes Revealed by Systematic Revison of a Complex of Australian Geckos (Diplodactylus; Diplodactylidae).

Oliver PM, Couper PJ, Pepper M - PLoS ONE (2014)

Holotype of D. custos sp. nov. (WAM R164780).The Grotto, Western Australia. (Image: Peter Waddington, QM).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4262211&req=5

pone.0111895.g014: Holotype of D. custos sp. nov. (WAM R164780).The Grotto, Western Australia. (Image: Peter Waddington, QM).
Mentions: Figs. 6F, 7H, 14

Bottom Line: Here, we use molecular genetics and morphological data to investigate the systematics and biogeography of a nominal Australian gecko species (Diplodactylus conspicillatus sensu lato) with a wide distribution spanning most of the Australian Arid Zone (AAZ) and Monsoonal Tropics (AMT).Our inferred phylogeny suggests the history and diversification of lineages in the AAZ and AMT are intimately linked, with evidence of multiple independent interchanges since the late Miocene.However, despite this shared history, related lineages in these two regions also show evidence of broadly contrasting intra-regional responses to aridification; vicarance and speciation in older and increasingly attenuated mesic regions, versus a more dynamic history including independent colonisations and recent range expansions in the younger AAZ.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, University of Melbourne, Melbourne, Victoria, Australia; Department of Sciences, Museum Victoria, Melbourne, Victoria, Australia; Division of Evolution, Ecology & Genetics, Research School of Biology, The Australian National University, Canberra, Australian Captital Territory, Australia.

ABSTRACT
How the widespread expansion and intensification of aridity through the Neogene has shaped the Austral biota is a major question in Antipodean biogeography. Lineages distributed across wide aridity gradients provide opportunities to examine the timing, frequency, and direction of transitions between arid and mesic regions. Here, we use molecular genetics and morphological data to investigate the systematics and biogeography of a nominal Australian gecko species (Diplodactylus conspicillatus sensu lato) with a wide distribution spanning most of the Australian Arid Zone (AAZ) and Monsoonal Tropics (AMT). Our data support a minimum of seven genetically distinct and morphologically diagnosable taxa; we thus redefine the type species, ressurrect three names from synonymy, and describe three new species. Our inferred phylogeny suggests the history and diversification of lineages in the AAZ and AMT are intimately linked, with evidence of multiple independent interchanges since the late Miocene. However, despite this shared history, related lineages in these two regions also show evidence of broadly contrasting intra-regional responses to aridification; vicarance and speciation in older and increasingly attenuated mesic regions, versus a more dynamic history including independent colonisations and recent range expansions in the younger AAZ.

No MeSH data available.


Related in: MedlinePlus