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Pseudocapillaria (Ichthyocapillaria) bumpi n. sp. (Nematoda: Capillariidae) Parasitising West African Lungfish Protopterus annectens (Owen, 1839) (Lepidosireniformes: Protopteridae) in Mozambique and Its Phylogenetic Position Within Capillariid Nematodes

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Abstract

Introduction

Pseudocapillaria (Ichthyocapillaria) bumpi n. sp. (Nematoda: Capillariidae) is described from specimens infecting the digestive tract of the West African lungfish, Protopterus annectens (Owen) (Lepidosireniformes: Protopteridae).

Methods

Nematodes were collected in Karingani Game Reserve, Southern Mozambique and studied using light microscopy; obtained sequences of the 18S ribosomal (18S rRNA) gene used for phylogenetic studies.

Results

The new species is assigned to Pseudocapillaria Freitas, 1959 by having a stichosome consisting of a single row of stichocytes and ventrolateral lobes on the male tail as well as by lacking spines on the specular sheath, caudal alae, a membranous caudal bursa, and a lateral expansion of the caudal end. It is also assigned to the sub-genus Ichthyocapillaria Moravec, 1982 by having a membrane between the ventrolateral lobes and by lacking a vulvar appendage. Pseudocapillaria (I.) bumpi n. sp. differs from its nominal congeners by having a comparatively large body size with relatively long spicule, bearing the thin membrane non-extending further than ventrolateral lobes in males and relatively smaller eggs without protruding polar plugs. It is the 20th species of the genus, the first from the Afrotropical Realm, and the first from any lungfish species. Phylogenetic analyses suggested that P. (I.) bumpi is deeply nested in a clade that associates species of the genera Pearsonema, Aonchotheca and Baruscapillaria.

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Acknowledgements

We thank Mr Elery Worth (Manager of Karingani Game Reserve) for providing the permissions, facilities, vehicles, and personnel to help collect hosts and parasites. We also thank Professor Frantisek Moravec (Institute of Parasitology of the Czech Academy of Sciences) for kindly granted copies of his publications. Funding for this work was provided by North-West University (Potchefstroom, South Africa) and by Auburn University’s Office of the Vice President for Research and Economic Development, the Southeastern Cooperative Fish Parasite and Disease Project (Alabama Department of Conservation and Natural Resources), and the Alabama Agriculture Experiment Station.

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Authors and Affiliations

  1. African Amphibian Conservation Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa

    Roman Svitin, Edward Netherlands, Yaroslav Syrota, Olivier Verneau & Louis du Preez

  2. South African Institute for Aquatic Biodiversity, Grahamstown, 6140, South Africa

    Roman Svitin & Louis du Preez

  3. I. I. Schmalhausen Institute of Zoology, 15 Bogdan Khmelnytskyi Street, Kyiv, 01030, Ukraine

    Roman Svitin & Yaroslav Syrota

  4. Aquatic Parasitology Laboratory, School of Fisheries, Aquaculture and Aquatic Sciences, College of Agriculture, Auburn University, 203 Swingle Hall, Auburn, AL, USA

    Stephen Bullard & Haley Dutton

  5. Centre de Formation et de Recherche sur les Environnements Méditerranéens, UMR 5110, University of Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860, Perpignan, France

    Olivier Verneau

  6. CNRS, Centre de Formation et de Recherche sur les Environnements Méditerranéens, UMR 5110, 52 Avenue Paul Alduy, 66860, Perpignan, France

    Olivier Verneau

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  1. Roman Svitin
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Correspondence to Roman Svitin.

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All applicable institutional, national and international guidelines for the care and use of animals were followed. North-West University ethics approval no NWU-00380-16-A5.

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Svitin, R., Bullard, S., Dutton, H. et al. Pseudocapillaria (Ichthyocapillaria) bumpi n. sp. (Nematoda: Capillariidae) Parasitising West African Lungfish Protopterus annectens (Owen, 1839) (Lepidosireniformes: Protopteridae) in Mozambique and Its Phylogenetic Position Within Capillariid Nematodes. Acta Parasit. 66, 1204–1211 (2021). https://doi.org/10.1007/s11686-021-00389-1

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