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 Parallelissus Meng, Qin & Wang, 2020 Parallelissus Meng, Qin & Wang, 2020 in Zhang et al . 2020: 435 . Type species: P. furvus Meng, Qin & Wang, 2020 , by original designation. Diagnosis The genus Parallelissus can be differentiated from the other genera of Sarimini by the following combination of characters: (1) the vein ScP of the tegmen long, largely surpassing midlength and nearly reaching apex; (2) the veins M and CuA with first fork at about midlength of tegmen, MP triforked with MP 1+2 separated subapically; (3) the gonostyli with capitulum elongate, strongly projecting dorsad and with poorly distinct neck; (4) the aedeagus with a single pair of lateral processes; (5) the dorsal lobe of the periandrium with a pair of subapical, lateral processes directed cephalad. Species included Parallelissus furvus Meng, Qin & Wang, 2020 Parallelissus fuscus Meng, Qin & Wang, 2020