Sixteen issid planthopper species in one day in Dong Son-Ky Thuong Nature Reserve in North Vietnam: Eight new species, one new genus and additional new records (Hemiptera: Fulgoromorpha: Issidae) Author Constant, Jérôme 6E6072A1-9415-4C8D-8E60-2504444DB290 Royal Belgian Institute of Natural Sciences, O. D. Phylogeny and Taxonomy, Entomology, Vautier street 29, B- 1000 Brussels, Belgium. jerome.constant@naturalsciences.be Author Pham, Hong Thai E34CB863-7E3B-4E8F-8738-B41C07D9F5F9 Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Hanoi, Vietnam. & Graduate School of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam. jerome.constant@naturalsciences.be text European Journal of Taxonomy 2024 2024-01-24 919 1 1 87 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2407/10617 journal article 10.5852/ejt.2024.919.2407 2118-9773 10559520 72B7907F-F901-4DDD-B2DD-63D03253837E Genus Rostrolatum Che, Zhang & Wang, 2020 Rostrolatum Che, Zhang & Wang, 2020 in Zhang et al . 2020: 335 . Type species: Rostrolatum separatum Che, Zhang & Wang, 2020 , by original designation. Diagnosis The genus Rostrolatum can be differentiated from all other genera of Parahiraciina by the following combination of characters: (1) the head elongate with a more or less conical cephalic process curved anteroventrally; (2) the vertex with lateral margins concave and with incomplete median carina; (3) the tegmina evenly rounded along lateral margin in dorsal view; (4) the anal tube of male dorsoventrally flattened and with apical margin roundly emarginate; (5) the aedeagus rather simple, moderately curved in lateral view and with a single pair of ventral processes curved anterodorsad. Note The genus was recently described in Zhang et al . (2020) to include a new species from Hainan Island, and it is here recorded from Vietnam for the first time. Species included Rostrolatum curviceps sp. nov. Rostrolatum separatum Che, Zhang & Wang, 2020