Ranatra spinifrons Montandon 1910
Creators: name: Tran, A. D.
name: Zettel, H.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Nepidae
Ranatra
Ranatra spinifrons

description: <i>Ranatra spinifrons</i> Montandon, 1910 <i>Ranatra stali</i> Montandon, 1905: 390–391 (in part). <i>Ranatra stali</i> var. <i>spinifrons</i> Montandon, 1910b: 166 (type locality: Sarawak, Borneo). <i>Ranatra spinifrons</i> Montandon, 1910b. — Montandon, 1914: 124–125 (elevated to species rank). — Lansbury, 1972: 339 (notes). — Tran &amp; Poggi, 2019: 237–241 (lectotype designation, redescription). <b>Additional material examined.</b> BRUNEI: 2 females (ZRC.6.18816), Belait District, Sg. Sepan (tributary to Sg. Ingei), in Kerangas forest, coll. Tan H.H., 11 May 1996, THH9621; 1 female (NHMW), Belait District, Sungai Ingei, forest pool near Base Camp, 04°09′15″N, 114°43′04″E, coll. Mayyer Ling, 14 June 2010 (34). <b>Diagnosis.</b> Body length: males 30–33, females 33–36; ratio of siphon length: body length ca. 0.67; siphon index ca. 1.65×; lorum lower and clypeus without nodule dorsally; vertex with very prominent tubercle, height of tubercle about equal to eye size in lateral view; ratio of eye width: interocular width ca 1.1; hemelytra reaching mid-length of abdominal tergum VI; posterior margin of metasternum angularly emarginated, with sublateral grooves; fore femur on flexor side with a median tooth and a median carina, and with one small pre-apical tooth (in males) or a pair of small pre-apical teeth (in females); hind femur, when folded back parallel to body surpassing anterior half but not reaching posterior margin of abdominal sternum VI (in both sexes); paramere: strongly constricted at distal half before a broadly curved and slender apical hook, apex of hook narrowly rounded, ventral side before apical hook with large, sub-triangular process. <b>Remarks.</b> The fore femur of males has one small but distinct pre-apical tooth, while that of females has a pair of small pre-apical teeth. This character in female specimens was overlooked in Tran &amp; Poggi (2019). For other comparative notes, see Remarks under <i>R</i>. <i>pangantihoni</i>, new species. The syntype of <i>R. spinifrons</i> from Ternate and specimens from Peninsular Malaysia identified as <i>R. spinifrons</i> by D. Polhemus &amp; J. Polhemus (2012) belong to separate unknown taxa, as already discussed in Tran &amp; Poggi (2019: 241). <b>Distribution.</b> Borneo: Sarawak and Brunei (Tran &amp; Poggi, 2019).
description: Published as part of <i>Tran, A. D. &amp; Zettel, H., 2021, Taxonomic review of the Ranatra gracilis group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of four new species, pp. 45-70 in Raffles Bulletin of Zoology 69</i> on pages 64-65, DOI: 10.26107/RBZ-2021-0005, http://zenodo.org/record/5351678
description: {"references": ["Montandon AL (1905) Especes nouvelles ou peu connues du genre Ranatra. Buletinul Societat \u0326 ii de S \u0326 ciint \u0326 e din Bucures \u0326 ci, Romania, 14: 389 - 398.", "Montandon AL (1910 b) Notes et descriptions d'especes nouvelles. Annales Musei Nationalis Hungarici, 8: 163 - 171.", "Montandon AL (1914) Nouvelles observations sur quelques formes peu connus de la fam. Nepidae, et descriptions d'especes nouvelles. Buletinul Societat \u0326 ii Romane de S \u0326 ciint \u0326 e, 23: 118 - 125.", "Lansbury I (1972) A review of the Oriental species of Ranatra Fabricius (Hemiptera-Heteroptera: Nepidae). Transactions of the Royal Entomological Society of London, 124: 287 - 341.", "Tran AD &amp; Poggi R (2019) The genus Ranatra Fabricius (Heteroptera: Nepidae) in Borneo, with a redescription of Ranatra spinifrons Montandon and the description of a new species. Zootaxa, 4555 (2): 236 - 246.", "Polhemus DA &amp; Polhemus JT (2012) Notes on Ranatra (Heteroptera: Nepidae) from Burma and the Andaman Islands, with description of a new species. Entomologica Americana, 118 (1): 242 - 251."]}