Possible speciation with gene flow in tropical cave snails

Schilthuizen, Menno and A., S. Cabanban and M., Haase (2005) Possible speciation with gene flow in tropical cave snails. Journal of Zoological Systematics Evolutionary Resrarch, 43 (2). pp. 133-138. ISSN 0947-5745


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In this paper, we present a newly-discovered troglobitic species of the snail genus Georissa from a limestone cave in Borneo. Molecular phylogenetic analysis of 16S mitochondrial DNA sequences shows that its ancestor is the local epigean population of Georissa saulae, living in the rainforest directly at the cave entrances. A multivariate analysis of shell characters reveals that the troglobite has diverged morphologically, but is connected to its epigean ancestor by a population of intermediate morphology in the twilight zone of the cave. The molecular data further indicate ongoing gene flow between the epigean population and the troglobite, via the intermediate population. We suggest that the troglobite may have diverged from its ancestor without prior isolation.

Item Type: Article
Uncontrolled Keywords: Gastropoda, Parapatric speciation, Caves, Troglobites, Mitochondrial DNA, Conchometry, Borneo, Sabah, 16S, Principal component analysis
Subjects: Q Science > QL Zoology > QL1-991 Zoology > QL360-599.82 Invertebrates
Divisions: INSTITUTE > Institute for Tropical Biology and Conservation
Depositing User: ADMIN ADMIN
Date Deposited: 14 Oct 2011 14:01
Last Modified: 16 Oct 2017 16:16
URI: http://eprints.ums.edu.my/id/eprint/980

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