The discovery of Scleropages sinensis dates the divergence of Scleropages and Osteoglossum as at least old as the Early Eocene, which is a significant step toward solving this zoogeographical puzzle.

The species, Scleropages sinensis, is an ancient variety of the Asian arowana, explained the paper's authors, Zhang Jiangyong with the Chinese Academy of Sciences and Mark Wilson, professor at the ...