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<p>The present study aimed to report monogenoids parasitizing the gills of two species of piranhas from the state of Maranhão, Brazil: <i>Pygocentrus nattereri</i> Kner, and <i>Serrasalmus rhombeus</i> (Linnaeus). Fifty specimens of <i>P. nattereri</i> were caught in the Lake “Grande” in the municipality of São Bento, and 50 specimens of <i>S. rhombeus</i> were caught in the main channel of the Pericumã River, municipality of Pinheiro. Fourteen species of dactylogyrids were found parasitizing the gills of <i>P. nattereri</i> and <i>S. rhombeus</i>. Of the 14 species identified, 11 were found in <i>P. nattereri</i>: <i>Amphitecium calycinum</i> Boeger &amp; Kritsky, 1988<i>, Amphitecium camelum</i> Boeger &amp; Kritsky, 1988; <i>Amphitecium falcatum</i> Boeger &amp; Kritsky, 1988; <i>Amphitecium junki</i> Boeger &amp; Kritsky, 1988; <i>Amphithecium</i> sp.; <i>Anacanthorus</i> sp. 1; <i>Anacanthorus jegui</i> Van Every &amp; Kritsky, 1992; <i>Anacanthorus mesocondylus</i> Van Every &amp; Kritsky, 1992; <i>Anacanthorus reginae</i> Boeger &amp; Kritsky, 1988; <i>Anacanthorus sciponophallus</i> Van Every &amp; Kritsky, 1992 and <i>Anacanthorus thatcheri</i> Boeger &amp; Kritsky, 1992. Five species were found in <i>S. rhombeus</i>: <i>Am. calycinum</i>; <i>Am. falcatum</i>; <i>Anacanthorus amazonicus</i> Van Every &amp; Kritsky, 1992; <i>A. maranhensis</i> <b>n. sp.</b> and <i>Notozothecium</i> sp. <i>Anacanthorus</i> sp. 1 differs from its congeners by the morphology of the MCO, which is a flat tube with sclerotized walls and pointed terminations at both ends. <i>Anacanthorus maranhensis</i> <b>n. sp.</b> differs from its congeners by the morphology of the MCO, which is a trough-shaped tube. This study increases the number of reported dactylogyrids from <i>P. nattereri</i> to 28, and to 26 for <i>S. rhombeus</i>.</p>

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Dactylogyrids (Platyhelminthes: Monogenoidea) from the gills of Pygocentrus nattereri and Serralsamus rhombeus (Characiformes: Serrasalmidae) from the State of Maranhão, Brazil, with the description of a new species of Anacanthorus

  • 期刊论文

  • 发表日期：

    2025年9月29日

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  • Germán Augusto Murrieta Morey,
  • Carmen Patricia Pasquel Pinedo,
  • Ricardo Sousa Oliveira,
  • Thais Avelar Vieira,
  • Luciano Alfredo Rodriguez Chu,
  • Alana Lislea de Sousa,
  • Diego Carvalho Viana

摘要

The present study aimed to report monogenoids parasitizing the gills of two species of piranhas from the state of Maranhão, Brazil: Pygocentrus nattereri Kner, and Serrasalmus rhombeus (Linnaeus). Fifty specimens of P. nattereri were caught in the Lake “Grande” in the municipality of São Bento, and 50 specimens of S. rhombeus were caught in the main channel of the Pericumã River, municipality of Pinheiro. Fourteen species of dactylogyrids were found parasitizing the gills of P. nattereri and S. rhombeus. Of the 14 species identified, 11 were found in P. nattereri: Amphitecium calycinum Boeger & Kritsky, 1988, Amphitecium camelum Boeger & Kritsky, 1988; Amphitecium falcatum Boeger & Kritsky, 1988; Amphitecium junki Boeger & Kritsky, 1988; Amphithecium sp.; Anacanthorus sp. 1; Anacanthorus jegui Van Every & Kritsky, 1992; Anacanthorus mesocondylus Van Every & Kritsky, 1992; Anacanthorus reginae Boeger & Kritsky, 1988; Anacanthorus sciponophallus Van Every & Kritsky, 1992 and Anacanthorus thatcheri Boeger & Kritsky, 1992. Five species were found in S. rhombeus: Am. calycinum; Am. falcatum; Anacanthorus amazonicus Van Every & Kritsky, 1992; A. maranhensis n. sp. and Notozothecium sp. Anacanthorus sp. 1 differs from its congeners by the morphology of the MCO, which is a flat tube with sclerotized walls and pointed terminations at both ends. Anacanthorus maranhensis n. sp. differs from its congeners by the morphology of the MCO, which is a trough-shaped tube. This study increases the number of reported dactylogyrids from P. nattereri to 28, and to 26 for S. rhombeus.