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Vogtnema asymmetrica n. gen., n. sp. (Nematoda: Cosmocercoidea: Atractidae) parasite of Rhinoclemmys punctularia (Daudin) (Testudines: Geoemydidae) from eastern Amazon, Brazil

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Abstract

Nematodes collected from the stomach and large intestine of Rhinoclemmys punctularia (Daudin) from the eastern Amazon, Brazil, are assigned to a new genus, Vogtnema n. gen., allocated in the family Atractidae (Cosmocerdoidea). Vogtnema n. gen. differs from all other genera of Atractidae based on the combination of the following morphological characters: four lips V-shaped (two subdorsal and two subventral) without sclerotized structures associated, absence of sclerotized formations and/or pieces surrounding the oral opening, oral aperture surrounded by flange internal membranous structures; in males the larger spicule is alate. The type species Vogtnema asymmetrica n. gen., n. sp. has the five precloacal pairs of papillae situated on the right side of the body that are more prominent than those on the left side. We also provide an identification key to the genera of the family Atractidae.

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Acknowledgements

We are grateful to Missiene Maria da Silva and Luiz Paulo da Silva Almeida for her support in host necropsies and collection nematodes; to Yuri Willkens for his technical support with SEM analyzes and Dra. Edilene Oliveira da Silva, from Laboratory of Cellular Structural Biology at the Federal University of Pará, Belém, for her technical support with the SEM analyses.

Funding

This study was supported by CAPES/ PPGBAIP/ UFPa, Fundação Amazônia de Amparo a Estudos e Pesquisa (FAPESPA) (01/2021 – PROGRAMA DE APOIO A NUCLEOS EMERGENTES) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) process number 431809/2018-6 Universal); Research productivity scholarship of CNPq to MELO, F.T.V. (Process number 304955/2018-3) and SANTOS, J.N. (Process number 305552/2019-8). All procedures contributing to this work comply with all applicable institutional, national, and international guidelines for animal care and use Animal Research Ethics Committee, Federal University of Pará, under license N8341260821CEUA/UFPa. The present study was approved by Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio), Brazil, and host specimens were collected under license number SISBIO: 53527-4. This study is part of the Ph.D thesis of Ronald Ferreira de Jesus in Postgraduate Program in the Biology of Infectious and Parasitic Agents (ICB-UFPa).

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Authors and Affiliations

  1. Laboratory of Cellular Biology and Helminthology “Profa. Dra. Reinalda Marisa Lanfredi”, Institute of Biological Sciences, Federal University of Pará (UFPa), Av. Augusto Correa 01, Guamá, Belém, Pará, 66075-110, Brazil

    Ronald Ferreira Jesus, Ana Nunes Santos, Bianca Nandyara, Jeannie Nascimento dos Santos & Francisco Tiago Vasconcelos Melo

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  1. Ronald Ferreira Jesus
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  2. Ana Nunes Santos
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  3. Bianca Nandyara
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  5. Francisco Tiago Vasconcelos Melo
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Contributions

R.F. Jesus wrote the main draft and prepared images. A.N. Santos and B. Nandyara helped with specimen observations and SEM analysis, reviewing, and writing the manuscript. J.N. Santos and F.T.V Melo wrote the manuscript, revised and prepared the line drawings. All authors reviewed the manuscript.

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Correspondence to Francisco Tiago Vasconcelos Melo.

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Jesus, R.F., Santos, A.N., Nandyara, B. et al. Vogtnema asymmetrica n. gen., n. sp. (Nematoda: Cosmocercoidea: Atractidae) parasite of Rhinoclemmys punctularia (Daudin) (Testudines: Geoemydidae) from eastern Amazon, Brazil. Syst Parasitol 99, 761–769 (2022). https://doi.org/10.1007/s11230-022-10065-1

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