Taxonomic review of the Ranatra gracilis group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of four new species Author Tran, A. D. Author Zettel, H. text Raffles Bulletin of Zoology 2021 2021-02-25 69 45 70 journal article 10.26107/RBZ-2021-0005 2345-7600 5351678 D63943BE-00B0-409E-BCE4-96942D33114E Ranatra lansburyi Chen, Nieser & Ho, 2004 Ranatra lansburyi Chen, Nieser & Ho, 2004: 89 ( type locality: Chiang Mai , Thailand ). — D. Polhemus & J. Polhemus, 2012: 247 (record Myanmar ). Material examined. THAILAND : 1 male , 1 female ( NHMW , previously det. as R. parmata by N. Nieser ), Chiang Mai Province , W Mae Rim , Mae Sa N.P. , Mae Sa Falls , coll. H. Zettel , 30–31 October 1995 . Diagnosis. Body length: males 27–31, females 31–34; ratio of siphon length: body length ca. 0.4; lorum lower clypeus and without nodule dorsally; ratio of eye width: interocular width ca. 0.8; posterior width of pronotum ca. 1.25× anterior width; pronotal length ca. 1.5× fore coxa length; hemelytra reaching posterior margin of abdominal tergum VI; posterior margin of metasternum roundly emarginated, with very narrow or indistinct sublateral grooves; fore femur on flexor side with a median tooth and a median carina, without preapical tooth; hind femur, when folded back parallel to body reaching anterior quarter of operculum (in males) or only slightly surpassing mid-length of abdominal sternum VI (in females); paramere: ventral side before apical hook with large, bi-lobed process, hook with truncate tip. Distribution. Myanmar , North Thailand ( Chiang Mai ), Southwestern China ( Yunnan ) ( Chen et al., 2004 ; D. Polhemus & J. Polhemus, 2012 ).