First Description of Asexual Generation and Taxonomic Revision of the Gall Wasp Genus Latuspina (Hymenoptera: Cynipidae: Cynipini)

The asexual generation of Latuspina Monzen is described for the first time. Although this genus was established based only on sexual generation upon which females possess a trifurcate hypopygial spine, the asexual generation females of Latuspina, including the type species L. stirps, possess a needle-shaped hypopygial spine, similar to that of many Cynipini, oak gall wasps. Based on the trifurcate hypopygial spine in sexual generation females, Neuroterus atamiensis Ashmead, N. hellwegi Dettmer, and N. nawai Ashmead are transferred to Latuspina in this paper: L. atamiensis comb. nov., L. hellwegi comb. nov., and L. nawai comb. nov. In addition, L. kofuensis Ide et Abe sp. nov. and L. abemakiphila Ide et Abe sp. nov. are described as new species from Japan. Latuspina includes nine species in total, but the asexual generation galls and adults of the following four species are unknown: L. abemakiphila, the Taiwanese species L. manmiaoyangae Melika et Tang, and two mainland Chinese species L. acutissimae Wang, Pujade-Villar et Guo and L. shaanxinensis Wang, Pujade-Villar et Guo. Although the host plant of L. shaanxinensis was reported as genus "Quercus" without specific name, the other species of Latuspina induce galls on oaks of the section Cerris of the genus Quercus, implying that they are specialized to oaks of this section.