BMC Evolutionary Biology BioMed Central Research article Open Access Reticulate phylogeny of gastropod-shell-breeding cichlids from Lake Tanganyika – the result of repeated introgressive hybridization Stephan Koblmüller1, Nina Duftner2, Kristina M Sefc1, Mitsuto Aibara3, Martina Stipacek1, Michel Blanc1, Bernd Egger1 and Christian Sturmbauer*1 Address: 1Department of Zoology, University of Graz, Universitätsplatz 2, 8010 Graz, Austria, 2Section of Integrative Biology, University of Texas at Austin,1 University Station, #C0930, Austin, TX 78712, USA and 3Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, B21-4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan Email: Stephan Koblmüller -
[email protected]; Nina Duftner -
[email protected]; Kristina M Sefc -
[email protected]; Mitsuto Aibara -
[email protected]; Martina Stipacek -
[email protected]; Michel Blanc -
[email protected]; Bernd Egger -
[email protected]; Christian Sturmbauer* -
[email protected] * Corresponding author Published: 25 January 2007 Received: 12 October 2006 Accepted: 25 January 2007 BMC Evolutionary Biology 2007, 7:7 doi:10.1186/1471-2148-7-7 This article is available from: http://www.biomedcentral.com/1471-2148/7/7 © 2007 Koblmüller et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Background: The tribe Lamprologini is the major substrate breeding lineage of Lake Tanganyika's cichlid species flock. Among several different life history strategies found in lamprologines, the adaptation to live and breed in empty gastropod shells is probably the most peculiar.