R. M. Feldmann, C. E. Schweitzer, H. Karasawa, G. Schweigert, and A. Garassino, “Treatise Online no. 60: Part R, Revised, Volume 1, Chapter 8G: Systematic descriptions: Infraorder Polychelida”, TREON, Sep. 2013, doi: 10.17161/to.v0i0.4593.