Review of the fossil genus Largusoperla (Plecoptera: Perlidae): Annotated checklist, taxonomic identification, and description of a new species Author Chen, Zhi-Teng Author Wang, Bo text Zootaxa 2019 2019-03-08 4565 2 281 291 journal article 28398 10.11646/zootaxa.4565.2.12 44ded8dc-3187-42db-a283-a59fec2c467d 1175-5326 2589796 9F4AA96D-877E-45EA-82FE-0DAFE856AD94 Largusoperla acus Chen et al., 2018 Largusoperla acus Chen et al. 2018 . Zootaxa, 4378(4): 575. Specimen status: male holotype , NIGP167158 (NIGP). Remarks. Largusoperla acus is the type species of Largusoperla . It can be easily distinguished from all other congeners by the paraproct strongly sclerotized and subapically constricted to a needle-like spine ( Fig. 1 ; Figs. 5–7 in Chen et al. 2018).