First Inventory Of The Water Bugs (Heteroptera: Nepomorpha: Gerromorpha) Of Langkawi Island, Kedah, Malaysia Author Zettel, Herbert Author Tran, A. D. text Raffles Bulletin of Zoology 2009 2009-08-31 57 2 279 295 journal article 10.5281/zenodo.5342032 2345-7600 5342032 Halobates (sensu stricto) proavus White, 1883 Material examined. – (all apterous): Pantai Kok: 1 female , KV1. Pantai Datai: 40 males , 34 females , KV5. Distribution. – From the Nicobar Islands and southern Thailand until Vanuatu (Andersen & Cheng, 2004).