Monogenea on exotic Indian freshwater fish. 5. First report of pathogenic Gussevia asota (Platyhelminths) from Oscar Astronotus ocellatus (Agassiz 1831) (Perciformes: Cichlidae) Author Tripathi, Amit 0000-0002-2751-4437 Department of Zoology, University of Lucknow- 226 007, Uttar Pradesh, India & tripathi _ amit @ lkouniv. ac. in; https: // orcid. org / 0000 - 0002 - 2751 - 4437 tripathi_amit@lkouniv.ac.in Author Matey, Chawan 0000-0002-7488-1520 Department of Zoology, University of Lucknow- 226 007, Uttar Pradesh, India & chawanmatey 19 @ gmail. com; https: // orcid. org / 0000 - 0002 - 7488 - 1520 chawanmatey19@gmail.com text Zootaxa 2023 2023-01-26 5231 1 52 64 http://dx.doi.org/10.11646/zootaxa.5231.1.4 journal article 10.11646/zootaxa.5231.1.4 1175-5326 7571538 AF52FC9F-51D1-4A8B-BB8D-8AB18F2E1197 Gussevia asota Kritsky, Thatcher & Boeger, 1989 Type host and locality: Astronotus ocellatus (Agassiz 1831) ( Perciformes : Cichlidae ); Janauac Lake, Manaus, Amazonas, Brazil and an aquarium in Pocatello, Idaho , United States . Present host and locality: Astronotus ocellatus (Agassiz 1831) ( Perciformes : Cichlidae ); Aquarium shops in Lucknow ( 26.8467° N , 80.9462° E ), New Delhi ( 28.6139° N , 77.2090° E ), and Kolkata ( 22.5726° N , 88.3639° E ); July 2020 to October 2021 . Site of infection: Gills Infection parameters: Prevalence: 100% (12 out of 12 A . ocellatus examined); Intensity: 30.16 ± 9.70 (18-48, n=12). Vouchers deposited: 4 specimens stained with Horen’s and Gomori’s trichrome and mounted on glass slides in DPX (Smithsonian Institution; USNM 1679191-94 ) . DNA sequences deposited: GenBank: 28S, ON614225