Fend, S.V. and Carter, J.L. 2014. Rhynchelmis subgenus Sutroa Eisen new rank, with two new species from western North America (Annelida, Clitellata, Lumbriculidae). Zootaxa. 3760, 2 (Jan. 2014), 180–210. DOI:https://doi.org/10.11646/zootaxa.3760.2.3.