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Henneguya mauritaniensis n. sp. (Myxozoa) from the arterial bulb of Pagrus caeruleostictus (Valenciennes, 1830) off Mauritania

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Abstract

We describe a new species of myxozoan, Henneguya mauritaniensis n. sp., extracted from the arterial bulb of the bluespotted seabream, Pagrus caeruleostictus (Valenciennes, 1830), collected in Mauritanian waters. Out of the 209 individuals examined, 30.1 % were infected with this new taxon. Spore total length ranged from 15.0 to 20.5 μm with a mean of 17.9 μm. The two polar capsules were equal in size, and pyriform and caudal appendages joined until mid-length. Morphometric analysis revealed significant differences between H. mauritaniensis n. sp. and morphologically similar species from this region as well as congeners known from other sparid hosts. Phylogenetic analysis of 18 S rDNA indicated that this new species is closely related to Henneguya pagri, reported recently from Pagrus major off Japan. Bayesian inference and maximum likelihood analyses of the 18 S rDNA dataset also revealed that species of marine Henneguya reported forming pseudocysts in the hearts of their fish hosts were closely related. Histological analysis of the H. mauritaniensis n. sp. pseudocysts embedded in the arterial bulb of P. caeruleostictus suggests that these parasites may cause considerable pathology, which may impact negatively on the health of the fish host. Finally, we discussed the importance of a combination of morphological and molecular analysis for species description because of high variability in size within the same taxa.

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Acknowledgments

This study was partially funded by and is a contribution from the Australian node of the CReefs global research initiative (grant number 209/29), a partnership between the ABRS, BHP Billiton, the Great Barrier Reef Foundation, the Census of Marine Life and the Australian Institute of Marine Science (AIMS). The CReefs Australia Project is generously sponsored by BHP Billiton in partnership with The Great Barrier Reef Foundation, the Australian Institute of Marine Science, the Australian Biological Resources Study and the Alfred P. Sloan Foundation. CReefs is a field program of the Census of Marine Life.

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Authors and Affiliations

  1. Office National d’inspection Sanitaire des Produits de la Pêche et de l’Aquaculture (ONISPA), BP 1416, Nouadhibou, Mauritania

    Sidi Khlifa

  2. Biodiversity Program, Queensland Museum, PO Box 3300, South Brisbane, Queensland, 4101, Australia

    Terrence L. Miller & Robert D. Adlard

  3. Département de Biologie Animale, Faculté des Sciences et Technique, Université Cheikh Anta Diop, Dakar, Sénégal

    N’gor Faye

  4. USR 3278 EPHE-CNRS CRIOBE and University of Perpignan, BP 1013, Papetoai, Moorea, French Polynesia

    Sidi Khlifa & Pierre Sasal

  5. Laboratoire d’Excellence CORAIL, Perpignan, France

    Pierre Sasal

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  1. Sidi Khlifa
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  2. Terrence L. Miller
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  4. N’gor Faye
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  5. Pierre Sasal
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Correspondence to Pierre Sasal.

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Khlifa, S., Miller, T.L., Adlard, R.D. et al. Henneguya mauritaniensis n. sp. (Myxozoa) from the arterial bulb of Pagrus caeruleostictus (Valenciennes, 1830) off Mauritania. Parasitol Res 111, 1287–1294 (2012). https://doi.org/10.1007/s00436-012-2963-1

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