1998/12/07 by Björn M. Ursing, Úlfur Árnason · 2 citations
Biochemistry, Genetics and Molecular Biology · #Genomics and Phylogenetic Studies #Genetic diversity and population structure #Identification and Quantification in Food #Hippopotamus #Paraphyly #Biology #Sister group #Clade #Phylogenetic tree #Zoology #Cetacea #Evolutionary biology #Phylogenetics #Mitochondrial DNA #Genetics #Gene
paper · doi:10.1098/rspb.1998.0567
openalex publication_date 1998/12/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Although the sister-group relationship between Cetacea and Artiodactyla is widely accepted, the actual artiodactyl group which is closest to Cetacea has not been conclusively identified. In the present study, we have sequenced the complete mitochondrial genome of the hippopotamus, Hippopotamus amphibius, and included it in phylogenetic analyses together with 15 other placental mammals. These analyses separated the hippopotamus from the other suiform included, the pig, and identified the hippopotamus as the artiodactyl sister group of the cetaceans, thereby making both. Artiodactyla and the suborder. Suiformes paraphyletic. The divergence between the hippopotamid and cetacean lineages was calculated using this molecular data and was estimated at ca. 54 Ma BP.