New records of Monogenoidea (Platyhelminthes) from three marine fish species from the coast of Angra dos Reis, Rio de Janeiro, Brazil Author Cohen, Simone Chinicz Laboratório de Helmintos Parasitos de Peixes, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz. Avenida Brasil, Author Justo, Marcia Cristina Nascimento Laboratório de Helmintos Parasitos de Peixes, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz. Avenida Brasil, marciajusto@ioc. Author Cárdenas, Melissa Querido Laboratório de Helmintos Parasitos de Peixes, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz. Avenida Brasil, text Zoologia 2022 e 22024 2022-12-16 39 1 11 http://dx.doi.org/10.1590/s1984-4689.v39.e22024 journal article 10.1590/S1984-4689.v39.e22024 1984-4689 13173780 Pseudoeurysorchis travassosi Caballero & Bravo-Hollis, 1962 Fig. 3 A-C Host: Haemulopsis corvinaeformis (Steindachner, 1868) New record. Brazil , Atlantic Ocean – Rio de Janeiro State • coast of Angra dos Reis, “Saco Piraraquara de Dentro”; 23°00’24”S , 44°19’05”W ; CHIOC 39730. Type-host: Microlepidotus inornatus Gill, 1862 ( Haemulidae ). Type-locality: California Gulf, San Carlos Bay, Guaymas, Sonora , Mexico . Other hosts: Microlepidotus brevipinnis (Steindachner, 1869) ( Haemulidae ), and Isacia conceptionis (Cuvier, 1830) ( Haemulidae ). Other localities: Mexico and Puerto del Callao , Peru . Description (based on six specimens ). Large monogenoids, easily distinguished on the gills. Body, not including haptor 3,325 –3,750 (3,483; n = 3) long by 1,625 –1,925 (1,817; n = 3) wide. Buccal suckers 67–105 (90; n = 10) long by 80–100 (89; n = 10) wide, muscular, septate. Pharynx 82–150 (130; n = 5) long by 75–107 (91; n = 5) wide. Genital atrium 45–57 (51; n = 6) long by 40–55 (50; n = 6) wide with 10 to 11 spines, which bears long point curved towards the center of the crown and bifurcated extremity toward the margin. Testes numerous, posterior to ovary, reaching the haptor. Ovary located immediately anterior to haptor, irregular shaped. Vitelline glands distributed throughout the body, including the haptor. Haptor 3,250 –4,375 (3,687; n = 4) long by 2,125 –2,575 (2,350; n = 4) wide, robust, occupying most part of the body of the parasite, composed of four pairs of sessile clamps. Clamps similar in size and shape, 480–810 (675; n = 24) long by 540–800 (644; n = 24) wide, constituted by two reinforced valves, ventral and dorsal, heavily sclerotized and articulated, supported by a median and marginal sclerites in the borders.