Pharyngonema Pierantoni, 1923

Ivanova, Elena S. & Hope, Duane, 2009, A new genus and three new species of Drilonematidae (Rhabditida, Drilonematoidea) from earthworms, Zootaxa 2293, pp. 53-67 : 66

Key to the species of Pharyngonema Pierantoni, 1923

1 Enlarged spots on head end situated at pharynx base, 104-123 µm long and 70-80 µm wide, spicules 52–57 µm long with an acute distal spine, gubernaculum infundibular, 38–40 µm long, egg-shells smooth ........................................ ................................................................................................................................ Ph. mekongianum Pierantoni, 1923

- Enlarged spots on head end situated at mid-pharynx, 36-56 µm long and 35-55 µm wide, spicules 37–40 µm long with a blunt claw at the distal tip, gubernaculum clavate, 25–26 µm long, egg-shells ornamented .............................. .......................................................................................................................................................... Ph. chinense sp. n.