{
  "abstract": "Four new species, assigned to the proposed new genus Tocantinsiella n. gen., were described from the gills of Caenotropus labyrinthicus collected in the Tocantins and Gurupi river basins, northern Brazil: Tocantinsiella maranhensis n. sp., Tocantinsiella brassicae n. sp., Tocantinsiella vesiculosa n. sp., and Tocantinsiella flabellata n. sp. The new species are characterized mainly by the presence of a sclerotized, robust, and sinistral vaginal vestibule, as well as a copulatory ligament connecting the male copulatory organ (MCO) from the accessory piece, which represent morphological and diagnostic characteristics for the proposed new genus. Tocantinsiella n. gen. is morphologically similar to Heterothecium due to the presence of a sclerotized, sinistral vaginal vestibule, differing due to the presence of a copulatory ligament and a non-articulated MCO. Philocorydoras also shares similarities related to the morphology of the copulatory complex. However, species of this genus are recorded only in Siluriformes fishes. This study provides a significant expansion of the diversity of helminth fauna in fishes of the family Chilodontidae by describing a new genus and four new species of Monopisthocotyla in the host studied.",
  "abstract_shown": true,
  "affiliations": [
    "Laboratório de Helmintos Parasitos de Peixes - LHPP, Instituto Oswaldo Cruz, Fiocruz, Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, RJ, 21040-360, Brazil.",
    "Laboratório de Helmintos Parasitos de Peixes - LHPP, Instituto Oswaldo Cruz, Fiocruz, Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, RJ, 21040-360, Brazil. yuricosta202115@gmail.com.",
    "Núcleo de Estudos Morfofisiológicos Avançados - NEMO, Universidade Estadual da Região Tocantina do Maranhão, Campus Imperatriz, Rua Godofredo Viana, 1300, Imperatriz, MA, 65901-480, Brazil.",
    "Laboratório de Sistemática e Ecologia de Organismos Aquáticos, Universidade Federal do Maranhão (UFMA), Campus de Chapadinha, BR-222, KM 04, S/N, Chapadinha, MA, Brazil."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Jéssica França Antunes",
      "orcid": "0009-0000-3363-4534"
    },
    {
      "affs": [
        0
      ],
      "name": "Marcia Cristina Nascimento Justo",
      "orcid": "0000-0003-2078-7587"
    },
    {
      "affs": [
        1
      ],
      "name": "Yuri Costa de Meneses",
      "orcid": "0000-0002-8737-1159"
    },
    {
      "affs": [
        0
      ],
      "name": "Álvaro José Bittencourt de Freitas",
      "orcid": "0000-0003-4338-7893"
    },
    {
      "affs": [
        2
      ],
      "name": "Diego Carvalho Viana",
      "orcid": "0000-0002-3302-9892"
    },
    {
      "affs": [
        3
      ],
      "name": "Felipe Polivanov Ottoni",
      "orcid": "0000-0002-9390-0918"
    },
    {
      "affs": [
        0
      ],
      "name": "Simone Chinicz Cohen",
      "orcid": "0000-0001-8204-336X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2br7xk9dkzyn9.bib",
  "cited_by": 0,
  "doi": "10.1007/s11230-026-10303-w",
  "fulltext_url": "https://europepmc.org/articles/PMC13719761",
  "id": "2br7xk9dkzyn9",
  "issns": [
    "0165-5752",
    "1573-5192"
  ],
  "landing_url": "https://europepmc.org/article/MED/42957831",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Article"
    ],
    [
      "openalex",
      "2303|Parasite Biology and Host Interactions"
    ]
  ],
  "openalex": "W7224853508",
  "pdf_url": "https://europepmc.org/articles/PMC13719761?pdf=render",
  "pmcid": "PMC13719761",
  "pmid": "42957831",
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2br7xk9dkzyn9.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T00:20:36Z",
      "native_id": "MED:42957831",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42957831"
    },
    {
      "first_seen": "2026-11-02T12:23:40Z",
      "native_id": "PMC13719761",
      "source": "pmc",
      "url": "https://doi.org/10.1007/s11230-026-10303-w"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "openalex:2303|Parasite Biology and Host Interactions",
      "subfield": "ecology"
    }
  ],
  "title": "Dactylogyridae (Monopisthocotyla) parasitizing Caenotropus labyrinthicus (Characiformes: Chilodontidae) from the Tocantins and Gurupi river basins, northern Brazil, with the proposal of Tocantinsiella n. gen. (Dactylogyridae) and four new species.",
  "title_text": "Dactylogyridae (Monopisthocotyla) parasitizing Caenotropus labyrinthicus (Characiformes: Chilodontidae) from the Tocantins and Gurupi river basins, northern Brazil, with the proposal of Tocantinsiella n. gen. (Dactylogyridae) and four new species.",
  "type": "peer-reviewed",
  "updated_at": "2026-11-03T12:20:46Z",
  "url": "https://research.draconitic.com/paper/2br7xk9dkzyn9",
  "venue": "Systematic parasitology",
  "versions": []
}