taxonID	type	description	language	source
038A6E00FFFDC95EFC8FF8850C04FDCE.taxon	diagnosis	Diagnosis (male and female): Body longer than wide, symmetrical. Cephalon not immersed in pereonite 1; forehead obtuse; antennal bases well separated. Pereonite 1 larger than pereonite 7; compact coxal plates, not extending posteriorly to the respective pereonites. Relatively long pereopods with 7 th pair longer than others, all ending in stout prehensile, claw-shaped dactyls. Mandible subrectangular, without cutting or incisor process. Pleon slightly immersed in pereonite 7; pleonites usually with lateral projections; pleopods multilaminate – pleopod 1 bilaminate, 2 quadrilaminate, 3 – 5 trilaminate. Pleotelson keelless shield-shaped; uropods short with endopods shorter than exopods.	en	Brito, André Mota Alves Marcos Vinícius Teles Gomes Uedson Pereira Jacobina Marcelo Fulgêncio Guedes (2024): Isopod parasites of Pygocentrus piraya (Characiformes: Serrasalmidae) in the lower São Francisco River, Brazil. Nauplius (e 20240530) 32: 1-10, DOI: 10.1590/2358-2936e20240530, URL: https://doi.org/10.1590/2358-2936e20240530
038A6E00FFFCC959FF39FDE00CE3FD08.taxon	description	(Fig. 2) Material examined. 2 females and 2 males (catalogue number: CZUFS CRU- 00373). Supplementary description. Females (Fig. 2 A): oval body; light milky color. Cephalon triangular, anterior long and rounded; scattered and discrete chromatophores; relatively small eyes. Antennule with 7 articles and antenna with 8 articles (Fig. 2 D, E). Pereon broad, being longest and widest at pereonite 5. Pleon narrow. Pleotelson prominent, wider than long. Pleopod 1 bilaminate, 2 quadrilaminate, 3 – 5 trilaminate; exopod longer than endopod. Uropod shorter than pleotelson. Males (Fig. 2 B, C). Smaller than females. Milky brownish coloration, with chromatophores forming patterned dotted dark brown pigmentation arranged at lateral and posterior ends of pereonites and in central strip extending from anterior to posterior region. Head with well-developed eyes. Antennule with 7 articles. Antenna bases well separated, with 8 articles. Seen from side, body practically straight, with subtle depression in pereonite 5. Host / site of infection. Pygocentrus piraya, body surface. Place of registration. Main channel of the São Francisco River between the municipalities of Porto Real do Colégio (state of Alagoas) and Propriá (state of Sergipe). Ecological descriptors. P = 22.22 %; Im = 2.00; Am = 0.44 ± 1.01	en	Brito, André Mota Alves Marcos Vinícius Teles Gomes Uedson Pereira Jacobina Marcelo Fulgêncio Guedes (2024): Isopod parasites of Pygocentrus piraya (Characiformes: Serrasalmidae) in the lower São Francisco River, Brazil. Nauplius (e 20240530) 32: 1-10, DOI: 10.1590/2358-2936e20240530, URL: https://doi.org/10.1590/2358-2936e20240530
038A6E00FFFBC958FC88FF060CEAFC03.taxon	description	(Fig. 3) Material examined. One male collected (catalogue number: CZUFS CRU- 00374). Supplementary description. Male: Yellowish coloration with chromatophores forming a patterned dotted dark pigmentation in distinct longitudinal bands along the body (Fig. 3 A). Laterally, body curved, with concave shape (Fig. 3 B); compact coxal plates not extending beyond pereonites. Cephalon anteriorly truncated, with well-developed eyes. Antennule with 7 articles. Antennal bases well separated, with 8 articles (Fig. 3 C, D). Pereopods ending in prehensile dactyls (hooks); some chromatophores also found on some pereopods; pereopod 7 with shorter dactyl than others. Pleotelson triangular, ending in small point. Pleopods short (Fig. 3 E), rounded. Pleopod 1 bilaminate, 2 quadrilaminate, 3 – 5 trilaminate; uropod extending beyond apex of pleotelson, with exopod slightly longer than endopod. Male appendix f lattened, tapering; small lateral and near medial peduncular lobes on all pleopods; anterior accessory gill lamellae present on pleopods 2 – 5. Host / site of infection. Pygocentrus piraya, body surface. Place of registration. Lagoa da Marituba, municipality of Penedo (state of Alagoas). Ecological descriptors. P = 11.1 %; Im = 1.00; Am = 0.11 ± 0.33.	en	Brito, André Mota Alves Marcos Vinícius Teles Gomes Uedson Pereira Jacobina Marcelo Fulgêncio Guedes (2024): Isopod parasites of Pygocentrus piraya (Characiformes: Serrasalmidae) in the lower São Francisco River, Brazil. Nauplius (e 20240530) 32: 1-10, DOI: 10.1590/2358-2936e20240530, URL: https://doi.org/10.1590/2358-2936e20240530
