Inoue J, Satoh N.

Mol Biol Evol. 2018 Apr 1;35(4):914-924. doi:10.1093/molbev/msy002

Deuterostome Genomics: Lineage-Specific Protein Expansions That Enabled Chordate Muscle Evolution.

Duplication of some muscle genes in the stem Oikopleura lineage, perhaps reflecting the importance of tail movement during larval and adult stages.