MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
EVOLUTIONARY AND BIOGEOGRAPHICAL HISTORY OF WEASEL-LIKE CARNIVORANS (MUSTELOIDEA)
SATO, J.; WOLSAN, M.; PREVOSTI, F. J.; D' ELIA, G.; BEGG, C.; BEGG, K.; HOSODA, T.; CAMPBELL, K.; SUZUKI, T.
MOLECULAR PHYLOGENETICS AND EVOLUTION
ACADEMIC PRESS INC ELSEVIER SCIENCE
Lugar: Amsterdam; Año: 2012 vol. 63 p. 745 - 745
We analyzed a concatenated (8492 bp) nuclearmitochondrial DNA data set from 44 musteloids (includ-ing the first genetic data for Lyncodon patagonicus) with parsimony, maximum likelihood, and Bayesianmethods of phylogenetic and biogeographic inference and two Bayesian methods of chronological infer-ence. Here we show that Musteloidea emerged approximately 32.430.9 million years ago (MYA) in Asia,shortly after the greenhouseicehouse global climate shift at the EoceneOligocene transition. Duringtheir Oligocene radiation, which proceeded wholly or mostly in Asia, musteloids diversified into four pri-mary divisions: the Mephitidae lineage separated first, succeeded by Ailuridae and the divergence of theProcyonidae and Mustelidae lineages. Mustelidae arose approximately 16.1 MYA within the Mid-MioceneClimatic Optimum, and extensively diversified in the Miocene, mostly in Asia. The early offshoots of thisradiation largely evolved into badger and marten ecological niches (Taxidiinae, Melinae, Mellivorinae,Guloninae, and Helictidinae), whereas the later divergences have adapted to other niches including thoseof weasels, polecats, minks, and otters (Mustelinae, Ictonychinae, and Lutrinae). Notably, and contrary totraditional beliefs, the morphological adaptations of badgers, martens, weasels, polecats, and minks eachevolved independently more than once within Mustelidae. Ictonychinae (which is most closely related toLutrinae) arose approximately 9.58.9 MYA, most likely in Asia, where it diverged into the Old WorldIctonychini (Vormela, Poecilictis, Ictonyx, and Poecilogale) and New World Lyncodontini (Lyncodon andGalictis) lineages. Ictonychini presumably entered Africa during the Messinian Salinity Crisis (at the Mio-cenePliocene transition), which interposed the origins of this clade (approximately 6.56.0 MYA) and itsAfrican PoecilictisIctonyxPoecilogale subclade (approximately 4.84.5 MYA). Lyncodontini originatedapproximately 2.92.6 MYA at the PliocenePleistocene transition in South America, slightly after theemergence of the Panamanian land bridge that provided for the Great American Biotic Interchange. Asthe genera Martes and Ictonyx (as currently circumscribed) are paraphyletic with respect to the generaGulo and Poecilogale, respectively, we propose that Pekania and Poecilictis be treated as valid generaand that Martes pennanti and Ictonyx libyca, respectively, be assigned to these genera.