Abolafia, J., Alizadeh, M. & Khakvar, R. (2016) Description of Panagrellus ulmi sp. n. (Rhabditida, Panagrolaimidae) from Iran, and comments on the species of the genus and its relatives. Zootaxa, 4162 (2), 245–267.
https://doi.org/10.11646/zootaxa.4162.2.3