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New species of Parapharyngodon (Nematoda: Pharyngodonidae) parasite of Osteocephalus taurinus (Anura: Hylidae) from Northern Brazilian Amazon Region

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Abstract

Parapharyngodon spp. are nematodes parasites of amphibian and reptiles worldwide distributed. Of 55 valid species, only 11 are known for the Neotropical realm, and six were found parasitizing hylid frogs in the world. In the present work, we describe a new species of Parapharyngodon from the large intestine of Osteocephalus taurinus from Reserva de Desenvolvimento Mamirauá, Amazonas, Brazil, using light and scanning electron microscopy. Parapharyngodon curupira n. sp. is allocated to the group of species with three pairs of cloacal papillae. However, it shows a set of different morphological characters compared to its congeners. In the new species, males have gubernaculum and smooth cloacal lip, females have pre-bulbar ovaries, and we also observed some morphometric differences. Among Parapharyngodon spp. from the Neotropical realm, the new taxon resembles P. alverangai and P. politoedi. The last species was described from the same host and biome (Amazon); however, they can be easily distinguished from new species by the presence of gubernaculum and v-shape structure at the lower caudal lip. Thus, we characterize and propose a new species of Parapharyngodon from the western amazon.

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Acknowledgments

We are grateful to the crew of the “Laboratório Multiusuário de Biologia Estrutural Celular, ICB-UFPA” and Yuri Willkens for technical support in SEM analysis.

Funding

This work was supported by CAPES/PPGBAIP/UFPA the National Council for Scientific and Technological Development (CNPq) (Grant Number 431809/2018-6 Universal); CNPq Research grant productivity to MELO, F. T. V. (Process No. 304955/2018-3) and SANTOS, J. N. (Process No. 305552/2019-8); FAPESPA/CNPQ PRONEM 01/2021 process 794027/2013. This study is part of the first author’s monograph and A.N.S Ph.D dissertation from the Postgraduate Program in Biology of Infectious and Parasitic Agents/ICB-UFPA.

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Authors and Affiliations

  1. Laboratório de Biologia Celular e Helmintologia “Profa Dra Reinalda Marisa Lanfredi” Instituto de Ciências Biológicas - Universidade Federal do Pará, Av. Augusto Corrêa 01 – Guamá, Belém, Pará, 66075-110, Brazil

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

  2. Laboratório de Ecologia e Conservação da Amazônia, Campus Capitão Poço - Universidade Federal Rural da Amazônia, Travessa Pau Amarelo, s/n, Vila Nova, Capitão Poço, Pará, 68650-000, Brazil

    Lilian Cristina Macedo

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  1. Ana Nunes Santos
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Correspondence to Ana Nunes Santos.

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Santos, A.N., Jesus, R.F., Macedo, L.C. et al. New species of Parapharyngodon (Nematoda: Pharyngodonidae) parasite of Osteocephalus taurinus (Anura: Hylidae) from Northern Brazilian Amazon Region. Syst Parasitol 99, 437–445 (2022). https://doi.org/10.1007/s11230-022-10037-5

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