RT info:eu-repo/semantics/article
T1 Genetic data from the extinct giant rat from Tenerife (Canary Islands) points to a recent divergence from mainland relatives
A1 Rando Reyes, Juan Carlos
A1 Renom, Pere
A1 Dios, Toni de
A1 Civit, Sergi
A1 Llovera, Laia
A1 Sánchez Gracia, Alejandro
A1 Lizano, Esther
A1 Marquès Bonet, Tomàs
A1 Kergoat, Gael J.
A1 Casanovas Vilar, Isaac
A1 Lalueza Fox, Carles
A2 Biología Animal y Edafología y Geología
A2 Evoluciónecología y conservación de vertebrados en Macaronesia (VerMac)
K1 ancient DNA
K1 body mass
K1 gigantism
K1 insular evolution
K1 molecular phylogeny
K1 rodents
AB Evolution of vertebrate endemics in oceanic islands follows a predictable pattern, known as the island rule, according to which gigantism arises in originally small-sized species and dwarfism in large ones. Species of extinct insular giant rodents are known from all over the world. In the Canary Islands, two examples of giant rats, †Canariomys bravoi and †Canariomys tamarani, endemic to Tenerife and Gran Canaria, respectively, disappeared soon after human settlement. The highly derived morphological features of these insular endemic rodents hamper the reconstruction of their evolutionary histories. We have retrieved partial nuclear and mitochondrial data from †C. bravoi and used this information to explore its evolutionary affinities. The resulting dated phylogeny confidently places †C. bravoi within the African grass rat clade (Arvicanthis niloticus). The estimated divergence time, 650000 years ago (95% higher posterior densities: 373000944000), points toward an island colonization during the Günz–Mindel interglacial stage. †Canariomys bravoi ancestors would have reached the island via passive rafting and then underwent a yearly increase of mean body mass calculated between 0.0015 g and 0.0023 g; this corresponds to fast evolutionary rates (in darwins (d), ranging from 7.09 d to 2.78 d) that are well above those observed for non-insular mammals.
YR 2021
FD 2021
LK http://riull.ull.es/xmlui/handle/915/38195
UL http://riull.ull.es/xmlui/handle/915/38195
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DS Repositorio institucional de la Universidad de La Laguna
RD 27-dic-2024