The complete mitochondrial genome of Temminck's ground pangolin (Smutsia temminckii; Smuts, 1832) and phylogenetic position of the Pholidota (Weber, 1904)

摘要

Temmincki's ground pangolin is primarily a nocturnal mammal belonging to the order Pholidota. The body is covered in hard overlapping scales and these animals find refuge in burrows, feeding only on termites and ants. In this study, the whole mtDNA of Temmincki's ground pangolin was sequenced and the phylogenetic position of Pholidota determined within Eutheria, using whole mtDNA sequences from various representative species. The results indicate that the whole mtDNA of Temmincki's ground pangolin is 16,559. bp long and shared some similarities with the whole mtDNA of the back-bellied tree pangolin and the Chinese pangolin. Phylogenetic analysis indicate that the order Pholidota is closely related and share a recent common ancestor with the order Carnivora rather than with the ant/insect eating order Xenarthra and the group Afrotheria. A time measured phylogeny of Pholidota estimated a split from Carnivora at around 87. mya, followed by a split of the African pangolins from their Asian counterparts such as the Chinese pangolin at around 47. mya. This suggests a Laurasian origin and convergent evolution of the Pholidota with respect to Xenarthra and Afrotheria.