Protorhabditis hortulana sp. n. (Rhabditida, Protorhabditidae) from southern Iberian Peninsula, one of the smallest free-living soil nematodes known, with a compendium of the genus
. Zootaxa. 4144, 3 (Jul. 2016), 397–410. DOI:https://doi.org/10.11646/zootaxa.4144.3.7.