Small-scale genetic structuring in a tropical cave snail and admixture with its above-ground sister species

Schilthuizen , Menno and Rutten , Elise M. J. and Haase, Martin (2012) Small-scale genetic structuring in a tropical cave snail and admixture with its above-ground sister species. Biological Journal of the Linnean Society, 105 (4). pp. 727-740. ISSN 0024-4066

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Official URL: http://dx.doi.org/10.1111/j.1095-8312.2011.01835.x

Abstract

We analyse the phylogeographical structure in the cave snail Georissa filiasaulae Haase & Schilthuizen, 2007 (Gastropoda: Hydrocenidae) and its above-ground sister species G.saulae (van Benthem-Jutting, 1966) at limestone outcrops in Sabah, Malaysian Borneo. Morphometric and 16S mitochondrial DNA data for some 220 individuals reveal strong morphological differentiation, despite ongoing unidirectional gene flow from the epigean into the hypogean environment, strong, small-scale genetic structuring within the cave and underground dispersal between caves that were previously thought to be isolated. We discuss these results - which constitute the first phylogeographical analysis of a terrestrial cave snail - in the light of speciation in cave organisms and across ecotones in general.

Item Type:Article
Uncontrolled Keywords:16S mtDNA, Borneo, Ecological speciation, Gastropoda, Georissa, Parapatric, Phylogeography, Troglobite, Cave, dispersal, Ecotone, Gene flow, Genetic structure, limestone, Mitochondrial DNA, Morphometry, Outcrop, parapatry, Phylogeography, Snail, Speciation (biology), tropical region, Borneo, East Malaysia, Malaysia, Sabah, Gastropoda, Georissa, Hydrocenidae
Subjects:?? QL360-599.82 ??
Divisions:SCHOOL > Institute for Tropical Biology and Conservation
ID Code:1116
Deposited By:IR Admin
Deposited On:02 Jan 2013 10:47
Last Modified:18 Feb 2015 15:06

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