Morphological and molecular characterization of Myxobolus dibombensis sp. n. (Myxozoa: Myxobolidae), a parasite of the African carp Labeobarbus batesii (Teleostei: Cyprinidae) from Dibombe River, Cameroon

  • Guy Benoît Lekeufack Folefack
  • Abdel-Azeem S. Abdel-Baki
  • Nelly Ornelle Onana Ateba
  • Abraham Fomena
  • Lamjed MansourEmail author
Fish Parasitology - Original Paper


Myxobolus dibombensis sp. n. (Cnidaria: Myxosporea: Bivalvulida) is described from the fins of the African carp, Labeobarbus batesii, based on morphological and molecular data. Prevalence of infection was 51.9% (67/129). Ovoid to spherical cyst-like plasmodia were found in the intrasegmental region and among the fin rays. No pathological changes were found in the fish host tissue surrounding the cyst-like plasmodia. Mature myxospores were ovoid in frontal view and lenticular in lateral view, with slightly truncated anterior and rounded posterior ends. Myxospores measured 16.8 (15.8–18.0) μm long and 11.4 (10.0–13.0) μm wide. There was a triangular intercapsular appendix measuring 3.8 (2.6–4.5) μm long. Polar capsules were ovoid and slightly unequal in size, occupying approximately one-third of the myxospore length. The larger polar capsule measured 7 (6–8) μm long and 3.6 (3–4) μm wide, while the smaller one measured 5.8 (4.8–7.0) μm long and 3 (2–4) μm wide. The larger polar capsule contained nine to 11 filament coils, whereas the smaller one contained seven to nine coils. SSU rDNA gene sequence of M. dibombensis sp. n. did not match any sequences available in the GenBank. The similarity with available Myxobolus spp. sequences ranged from 65 to 81%. The novel species clustered with M. algonquinensis, which infects the cyprinid Luxilus cornutus from Canada.


Myxobolus African carp SSU rDNA Phylogeny Fish diseases 


Funding information

The Dean of Scientific Research, King Saud University, funded the work through the research group project number RG-1435-023.

Compliance with ethical standards

Conflict of interest

The authors declare that there is no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Guy Benoît Lekeufack Folefack
    • 1
  • Abdel-Azeem S. Abdel-Baki
    • 2
    • 3
  • Nelly Ornelle Onana Ateba
    • 1
  • Abraham Fomena
    • 1
  • Lamjed Mansour
    • 2
    • 4
    Email author
  1. 1.Laboratory of Parasitology and Ecology, Department of Animal Biology and PhysiologyUniversity of Yaounde IYaoundeCameroon
  2. 2.Department of Zoology, College of ScienceKing Saud UniversityRiyadhSaudi Arabia
  3. 3.Zoology Department, Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt
  4. 4.Laboratoire de Biodiversité, Parasitologie et Ecologie des Écosystèmes Aquatiques, Département de Biologie, Faculté des Sciences de TunisUniversité de Tunis El ManarTunisTunisia

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