Parasitic copepods (Crustacea, Hexanauplia) on fishes from the lagoon flats of Palmyra Atoll, Central Pacific Author Soler-Jimenez, Lilia C. Author Morales-Serna, F. Neptali Author Aguirre-Macedo, Ma. Leopoldina Author McLaughlin, John P. Author Jaramillo, Alejandra G. Author Shaw, Jenny C. Author James, Anna K. Author Hechinger, Ryan F. Author Kuris, Armand M. Author Lafferty, Kevin D. Author Vidal-Martinez, Victor M. text ZooKeys 2019 833 85 106 http://dx.doi.org/10.3897/zookeys.833.30835 journal article http://dx.doi.org/10.3897/zookeys.833.30835 1313-2970-833-85 6F31349BBF7D434D8C064128FDD76A56 Hatschekia longiabdominalis Uyeno & Nagasawa, 2013 Type host. Arothron hispidus ( Tetraodontidae ). Other host and localities. Arothron hispidus ( Tetraodontidae ) from Japan ( Uyeno and Nagasawa 2013 ). To date, H. longiabdominalis has not been recorded from others host and locality. Current host. Arothron hispidus ( Tetraodontidae ). Site of infection. Gills. Prevalence and mean intensity. 53.3 and 100 +/- 329.2 (n = 15). Specimens deposited. CHCM No. 576 (voucher) (1 vial, 1 specimen ♀). USNM No. 1550605 (voucher) (1 vial, 1 specimen ♀). Remarks. Of the nine genera included in the Hatschekiidae , the most speciose genus is Hatschekia , with approximately 140 valid species so far. According to Uyeno and Nagasawa (2013) , H. longiabdominalis may be separated from other congeners by having a fusiform trunk with posterior lobes, the urosome markedly projecting beyond posterior lobes of the trunk, and unique intercoxal sclerites of legs 1 and 2, which strongly project from the middle of the anterior margin and bear four blunt processes on the posterior margin. We observed all of these characters in our specimens.