Ranatra nieseri Tran & Nguyen, 2016

Tran, A. D. & Zettel, H., 2021, Taxonomy of the Ranatra biroi group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of two new species, Raffles Bulletin of Zoology 69, pp. 507-521 : 514

Ranatra nieseri Tran & Nguyen, 2016

Ranatra nieseri Tran & Nguyen, 2016: 517–519 (type locality: Ninh Binh, Vietnam).

Material examined. Same as in Tran & Nguyen (2016).

Diagnosis. Body length: males 22.0–2.5, female 24.0; siphon length ca. 0.7–0.8× body length; lorum swollen, slightly lower than clypeus; vertex higher than eye, with low conical tubercle; eye width ca. 0.9–1.1× interocular width; space between middle coxae about 0.6× space between hind coxae; posterior margin of metasternum slightly emarginated; hind femur, when folded back parallel to body nearly reaching apex of abdomen (in both sexes); paramere dorso-ventrally constricted in distal third, apical hook evenly curved, tip of hook truncate, expanded, ventral margin with a broad tooth-like elevation immediately basad of hook.

Distribution. Vietnam: Ninh Binh ( Tran & Nguyen, 2016).