Literaturdatenbank
Literaturdatenbank |
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Lamb, T., & Osentoski, M. F. (1997). On the paraphyly of malaclemys: a molecular genetic assessment. Journal of Herpetology, 31(2), 258–265.
Added by: Admin (17 Aug 2008 18:54:50 UTC) |
| Resource type: Journal Article BibTeX citation key: Lamb1997 View all bibliographic details  |
Categories: General Keywords: Emydidae, Genetik = genetics, Graptemys, Malaclemys, Malaclemys terrapin, Schildkröten = turtles + tortoises, Systematik = taxonomy Creators: Lamb, Osentoski Collection: Journal of Herpetology |
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| Abstract |
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Malaclemys (the diamondback terrapin) and Graptemys (map turtles) are closely related emydid taxa that at times have been considered congeneric. Wood (1977) offered a novel interpretation of their evolutionary ties, suggesting that various subspecies of Malaclemys gave rise directly to many species of Graptemys. Although this paraphyletic view of Malaclemys has not been widely accepted, neither has it been subject to rigorous phylogenetic analysis. The ideal character set for analysis should exhibit variation appropriate to resolve relationships within Malaclemys, among Graptemys, and between both genera. Here we report such a data set composed of DNA sequences for the mitochondrial control region and cytochrome b gene. Thirty-two equally parsimonious trees were generated from the sequence data, all of which depict Malaclemys and Graptemys as distinct monophyletic clades. Thus, our molecular phylogenies clearly refute Wood's hypothesis that Malaclemys is paraphyletic with respect to Graptemys.
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