Ranatra elongata, Fabricius, 1790

Tran, A. D. & Zettel, H., 2021, Taxonomic review of the Ranatra gracilis group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of four new species, Raffles Bulletin of Zoology 69, pp. 45-70 : 47

Ranatra elongata group sensu Lansbury, 1972

Diagnosis. Large species, body length: males 37–48, females 39–53; siphon long, ratio of siphon length: body length around 0.7–1.3; vertex in lateral view clearly lower than eye, without tubercle; flexor side of fore femur with a long and narrow tooth at distal 0.3–0.4 and a carina proximal to tooth, a pair of pre-apical teeth usually present (except R. dispar and R. feana ); posterior part of metasternum medially raised, with posterior margin convex; operculum of female clearly surpassing connexivum; connexivum of female produced posteriorly; male paramere with thick process on ventral side before hook, apical hook short and thick.

Species included. Ranatra chinensis Mayr, 1865 , R. elongata Fabricius, 1790 , R. dispar Montandon, 1903a , R. feana Montandon, 1903b , and R. megalops Lansbury, 1972 .

Note. For comparison between species and also key to species of this group, see Lansbury (1972).