Revisions * new taxa * and venation transformations of the sawfly family Blasticotomidae sensu lato (Hymenoptera: ºenthredinoidea) highlight the evolution of the basal Hymenoptera Author Sun, Chenhui College of Life Sciences * Capital Normal University * Beijing 100048 * China Author Rasnitsyn, Alexandr P. Paleontological Institute * Russian Academy of Sciences * 123 * 117647 Moscow * Russia & Department of Palaeontology * Natural History Museum * Cromwell Road * London SW 7 5 BD * UK alex.rasnitsyn@gmail.com&tpgao@cnu.edu.cn Author Wedmann, Sonja Senckenberg Forschungsstation Grube Messel * Senckenberg Forschungsinstitut und Naturmuseum Frankfurt am Main * 64409 Messel * Germany Author Zhuang, Jialiang College of Life Sciences * Capital Normal University * Beijing 100048 * China Author Shih, Chungkun College of Life Sciences * Capital Normal University * Beijing 100048 * China & Department of Paleobiology * National Museum of Natural History * Smithsonian Institution * Washington * DC 20013 - 7012 * USA alex.rasnitsyn@gmail.com&tpgao@cnu.edu.cn Author Ren, Dong College of Life Sciences * Capital Normal University * Beijing 100048 * China alex.rasnitsyn@gmail.com&tpgao@cnu.edu.cn Author Gao College of Life Sciences * Capital Normal University * Beijing 100048 * China text Zoological Journal of the Linnean Society 2024 2024-09-21 202 1 http://dx.doi.org/10.1093/zoolinnean/zlae113 journal volume 10.1093/zoolinnean/zlae113 0024-4082 9ECD785-00BF-494C-9888-0B0D073F302C Aduantoma Sun, Rasnitsyn, Zhuang & Shih gen. nov. http://zoobank.org/urn:lsid:zoobank.org:act:F2C9AEB7- D2BA-4CC8-A48A-E6724C7657D7 Type species: Aduantoma insolita Sun * Rasnitsyn* Zhuang & Shih sp. nov. Etymology: The generic name is a combination of the Latin ‘Aduant-’* meaning associated* and referring to the Sc in forewing* and ‘-toma’ from the type genus Undatoma Rasnitsyn * 1977. Gender feminine. Included species: Type species only. Diagnosis: Forewing with pterostigma wide. Vein Sc with stalk distant from R* making a kink to touch R and leaving Sc 1 oblique crossvein-like. 1-Rs present* single. 1-M shorter than 2-Cu. Cell 1mcu long* with its upper side three times as long as 1m-cu.