title: Chronology of the extant African elephant species and case study of the species identification of the small African elephant with the molecular phylogenetic method.
abstract: Despite vigorous genetic studies of African elephants (Loxodonta africana and L. cyclotis) during the last decade, their evolutionary history is still obscure. Phylogenetic studies and coalescence time estimation using longer nucleotide sequence data from denser samplings are necessary to better understand the natural history of African elephants. Further, species identification among African elephants is sometimes very difficult using only the external morphological characteristics. This is a serious problem for making an adequate breeding plan in zoological gardens. In this paper, we investigated the continent-wide phylogeographical pattern of the African elephants and estimated the coalescence times among them. From these molecular data and geological evidence, we proposed an evolutionary scenario for the African elephants. We further demonstrated the effectiveness of molecular phylogenetic methods in species identification.
authors.affiliation: Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, 226-8501, Japan.
authors.forename: Yumie
authors.initials: Y
authors.lastname: Murata
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yonezawa
authors.forename: Ichiro
authors.initials: I
authors.lastname: Kihara
authors.forename: Toshihide
authors.initials: T
authors.lastname: Kashiwamura
authors.forename: Yuji
authors.initials: Y
authors.lastname: Sugihara
authors.forename: Masato
authors.initials: M
authors.lastname: Nikaido
authors.forename: Norihiro
authors.initials: N
authors.lastname: Okada
authors.forename: Hideki
authors.initials: H
authors.lastname: Endo
authors.forename: Masami
authors.initials: M
authors.lastname: Hasegawa
mesh_terms: D000349:Africa; D000818:Animals; D002467:Cell Nucleus / Q000235:genetics; D004606:Elephants / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics*; D050259:Genes, Mitochondrial; D010802:Phylogeny