In this study, Cicadellidae (Hemiptera: Cicadormorpha) species collected from Sinop and its surroundings in 2016-2018 were evaluated. 27 belonging to 7 subfamilies identified the study area. List of species, number specimens, localities, Turkey zoogeographical distribution are given. Of 11 first records for local fauna Sinop, 5 Black Sea Region

Halaphanolaimus sergeevae n. sp. is described and illustrated from the Sinop coasts (southern Black Sea, Turkey). The new species morphologically resembles H. pellucidus Southern, 1914, but differs from it by having a higher number of tubular supplements (12-14 vs. 6-7), longer spicules (68-70 im vs 47-52 [tm), smaller tail/spicule ratio (1.6 vs. 2.7), smaller body size (926-1273 vs. 1500 micro...