Species delimitation methods put into taxonomic practice: two new Madascincus species formerly allocated to historical species names (Squamata, Scincidae)
2016
Miralles, Aurélien | Köhler, Jörn | Glaw, Frank | Vences, Miguel
In a previous study, Miralles and Vences (2013) compared seven different methods of species delimitation applied to the genus Madascincus . While focusing on methodological aspects their study involved an extensive data set of multilocus DNA sequences and of comparative morphology. On this basis they emphasized the need of revising the taxonomy of Madascincus , and revealed the existence of at least two well-supported candidate species. The present paper provides formal descriptions of these two taxa: (1) Madascincus miafina sp. n., a species from dry areas of northern Madagascar, morphologically very similar to Madascincus polleni (although both species are not retrieved as sister taxa), and (2) Madascincus pyrurus sp. n., a montane species occurring >1500 m above sea level, endemic to the central highlands of Madagascar (Ibity and Itremo Massifs). Phylogenetically, Madascincus pyrurus is the sister species of Madascincus igneocaudatus, a taxon restricted to the dry littoral regions of the south and south-west of Madagascar in lowlands <500 m above sea level. To facilitate future taxonomic work, we furthermore elaborated an identification key for species of Madascincus. Finally, some aspects of the biogeographic patterns characterising the different main clades within the genus Madascincus are provided and discussed for the first time in the light of a robust phylogenetic framework.
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