Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
For each species, the genome size and total gene number as well as habitat and morphological characteristics are also indicated. The tree was modified and compiled from refs. 10,23,40. * denotes transcriptome data.