Taxonomic revision of the Tetraneura akinire species group (Insecta, Aphididae, Eriosomatinae), with description of a new species and a correction of a nomenclatural confusion Author Watanabe, Tomoko Department of Ecology and Systematics, Graduate School of Agriculture, Hokkaido University, Sapporo 060 - 8589, Japan. Author Lee, Wonhoon Department of Plant Medicine and Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea. Author Sano, Masakazu Department of Ecology and Systematics, Graduate School of Agriculture, Hokkaido University, Sapporo 060 - 8589, Japan; Present address: Division of Large-Scale Upland Farming Research, Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization, Sapporo 062 - 8555, Japan. Author Murakami, Keisuke Department of Ecology and Systematics, Graduate School of Agriculture, Hokkaido University, Sapporo 060 - 8589, Japan. Author Akimoto, Shin-Ichi Department of Ecology and Systematics, Graduate School of Agriculture, Hokkaido University, Sapporo 060 - 8589, Japan; Present address: The Hokkaido University Museum, Sapporo 060 - 0810, Japan. text Zootaxa 2022 2022-09-12 5183 1 162 186 journal article 140874 10.11646/zootaxa.5183.1.14 4ae9eeda-a1bc-4c01-8eb9-da0a5c67188c 1175-5326 7070086 0C146F2F-00D5-4C43-B500-341AFD8F384B Tetraneura sorini Hille Ris Lambers, 1970 Another species in the species group is T. sorini , which was described based on a specimen collected from a gall on a leaf of Ulmus sp. in Sapporo, Hokkaido. The host plant is most likely U. davidiana var. japonica , which is the most common elm species in Hokkaido. Hille Ris Lambers (1970) reported that this species is also distributed in Korea . Tetraneura sorini is sometimes confused with T. akinire sensu novo because the fundatrix first instars of T. sorini coexist with those of T. akinire and other Tetraneura species on the same elm tree. The fundatrix first instar of this species is very large in body size and parasitic to other Tetraneura species , usurping incipient galls of T. akinire or other Tetraneura species ( Akimoto & Yamaguchi 1997 ; Muramatsu & Akimoto 2016 ); thus, T. sorini galls frequently coexist with those of other species. We redescribed this species based on the fundatrix first instar, emigrant and sexupara.