Gordionus diligens de Villalobos, Ribera & Downie 1999
de Villalobos, Ribera & Downie 1999. Hairworms found in Scottish agricultural land, with descriptions of two new species of Gordionus Muller (Nematomorpha: Gordiidae). Journal of Natural History, 33(12), December 1999: 1767-1780