Nagy, H., Felföldi, T., & Dózsa-Farkas, K. (2018).

Morphological and molecular distinction of two Fridericia species (Clitellata, Enchytraeidae) having same spermatheca type

. Zootaxa, 4496(1), 111–123. https://doi.org/10.11646/zootaxa.4496.1.8