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Vertebrate Zoology
Article . 2022 . Peer-reviewed
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Vertebrate Zoology
Article . 2022
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Phylogeny and phylogeography of chelonians from sub-Saharan Africa—A review of current knowledge in tribute to Margaretha D. Hofmeyr

Authors: Uwe Fritz; Krystal A. Tolley; Melita Vamberger; Flora Ihlow;

Phylogeny and phylogeography of chelonians from sub-Saharan Africa—A review of current knowledge in tribute to Margaretha D. Hofmeyr

Abstract

Species-level phylogeny and especially phylogeography of African chelonians is a comparatively under-studied field of research. We review the current knowledge of phylogeny and phylogeography, highlight congruence of spatial phylogeographic patterns amongst chelonians and other taxa and suggest future research directions to address gaps in knowledge. Our review shows that phylogeographic and phylogenetic investigations have led to unexpected findings. For example, forPelomedusa, a putatively wide-ranging monotypic terrapin genus, cryptic diversity was revealed, with more than ten species being uncovered. The formerly recognized tortoise genusHomopussensu lato was found to be paraphyletic with respect toChersina. To resolve this situation,Homopuswas restricted to the four-toed speciesH. areolatusandH. femoralisand the genusChersobiuswas resurrected for the five-toed speciesC. boulengeri,C. signatus, andC. solus. Three previously recognized taxa were shown to be invalid, viz. the putatively extinct terrapin speciesPelusios seychellensisand the tortoise subspeciesChersobius signatus caferandStigmochelys pardalis babcocki. Together with taxonomy, the knowledge of phylogeographic structuring sets a solid foundation for conservation measures and allows the identification of Management and Conservation Units. However, the current legislation, in particular the enforcement of the Nagoya Protocol under the Convention of Biological Diversity (CBD), has largely halted research on widely distributed taxa and turned the well-intended concept of Access and Benefit Sharing into a major impediment for conservation and research. The current situation leads for many species to a continued usage of outdated and incorrect taxonomic classifications resulting in an error cascade of conservation decisions. This is counterproductive to the aims of the CBD, that is, the protection of biodiversity. Sequencing historical DNA from museum specimens using aDNA approaches could be a short-term approach to mitigate, but not solve, this impediment.

Keywords

Reptilia, terrapin, turtle, taxonomy, Trionychidae, Testudinidae, QL1-991, Testudines, CBD, Pelomedusidae, systematics, Nagoya Protocol, Zoology, tortoise

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
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7
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Italian National Biodiversity Future Center