The phylogeography of the darkling beetle, Hegeter politus, in the eastern Canary Islands
Open Access
- 22 January 1998
- journal article
- Published by The Royal Society in Proceedings Of The Royal Society B-Biological Sciences
- Vol. 265 (1391) , 135-140
- https://doi.org/10.1098/rspb.1998.0274
Abstract
We investigated the phylogeography of Hegeter politus, a saprophagous, flightless darkling beetle endemic to the eastern Canary Islands, using a fragment of the mitochondrial COI gene. Distance and parsimony based gene trees of the mitotypes identified revealed a striking association between mitotype clades and sampling locations. The branching order of the clades suggested that the colonization of the islands by Hegeter politus proceeded from the southern part of Fuerteventura in a north–northeast direction to Lanzarote and the smaller islands. Based on this, a colonization scenario compatible with the reported geological ages and volcanisms of the various parts of the islands has been proposed. The high divergence of the beetles collected from the extreme south of Fuerteventura (the Jandía peninsula) from all other samples has led us to propose that they may be from a new species that has not been described previously. The ecological isolation of Jandía from the rest of Fuerteventura by the sand dunes that cover its narrow isthmus in the north, and the existence of many plant and animal endemisms unique to Jandía, lend supportive evidence to our proposal. The similarities between the evolution of island endemics in the Hawaiian and Canary archipelagos have been discussed. We conclude that many endemics in the Canary archipelago, like the Hawaiian Islands, are most likely to have originated from post–colonization differentiation and divergence.Keywords
This publication has 19 references indexed in Scilit:
- Mitochondrial DNA sequence variation and phylogeography of Pimelia darkling beetles on the Island of Tenerife (Canary Islands)Heredity, 1996
- Volcanic complexes in the eastern ridge of the Canary Islands: the Miocene activity of the island of FuerteventuraJournal of Volcanology and Geothermal Research, 1996
- Mitochondrial DNA phylogeny and sequential colonization of Canary Islands by darkling beetles of the genusPimelia(Tenebrionidae)Proceedings Of The Royal Society B-Biological Sciences, 1995
- Postglacial expansion and genome subdivision in the European grasshopper Chorthippus parallelusMolecular Ecology, 1995
- Molecular phylogeny of the Canary Island lacertids (Gallotia): mitochondrial DNA restriction fragment divergence in relation to sequence divergence and geological timeJournal of Evolutionary Biology, 1993
- Unbiased estimation of the rates of synonymous and nonsynonymous substitutionJournal of Molecular Evolution, 1993
- Evolution of the eastern volcanic ridge of the Canary Islands based on new KAr dataJournal of Volcanology and Geothermal Research, 1992
- Relict floras of Atlantic islands: patterns assessedBiological Journal of the Linnean Society, 1992
- The significance of island biotasBiological Journal of the Linnean Society, 1992
- A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequencesJournal of Molecular Evolution, 1980