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 Maculergithus luteomaculatus ( Constant & Pham, 2016 ) Fig. 2G Gergithus ( Maculergithus ) luteomaculatus Constant & Pham, 2016: 6 (keyed, described), figs 2a–b, 3–4 (habitus, details, male terminalia). Gnezdilovius luteomaculatus Meng et al . 2017: 18 (transferred to Gnezdilovius Meng, Webb & Wang, 2017 ). Maculergithus luteomaculatus Gnezdilov 2017b: 1345 (transferred to Maculergithus ). Diagnosis Maculergithus luteomaculatus can be recognized by: (1) the frons with a yellow spot along dorsal margin; (2) the yellow vertex; (3) the two yellow spots on tegmina along sutural margin; (4) the tegmina with 8 yellow spots in total; (5) the left ventrolateral lobe of periandrium laminate and projecting laterally with 3 pointed processes projecting anterolaterally, the median one more developed, and another, more posterior pointed process projecting laterally. Material examined VIETNAM2 ♀♀ ; Quang Ninh Province , Dong Son-Ky Thuong Nature Reserve ; 21°08′29″ N , 107°04′53″ E ; 27 Aug. 2022 ; 550 m a.s.l. ; secondary forest; GTI Project; J. Constant , J. Bresseel and L. Semeraro leg.; I.G.: 34.518; RBINS 1 ♀ ; same collection data as for preceding; VNMN . Note This represents the first record of the species outside its type locality in Tam Dao National Park, and the first record from Quang Ninh Province .