Parasitology Research

, Volume 114, Issue 10, pp 3783–3789 | Cite as

Morphological and molecular aspects of Ceratomyxa mehlhorni n. sp., a parasite of the golden trevally Gnathanodon speciosus in the Arabian Gulf off the Saudi Arabian coast, with data on its seasonal prevalence

  • Lamjed Mansour
  • Abdel-Azeem S. Abdel-Baki
  • Hussain A. Al-Qahtani
  • Saleh Al-Quraishy
Original Paper
First Online:
Received:
Accepted:

Abstract

During a survey of the myxosporean fauna of the golden trevally Gnathanodon speciosus from the Arabian Gulf off Saudi Arabia, a species of Ceratomyxa that did not conform to any known species was recorded. The infection was detected as a large number of mature spores free-floating in the bile. Mature spores were hat- or helm-like in the frontal view with two short and unequal valves. The spores measured 8 (7–9) × 12 (10–14). The two polar capsules were spherical, equal in size and measured 3 (2–4) in diameter with three filament turns. Sporoplasm was binucleated and filled the whole extracapsular space. The small subunit ribosomal DNA sequence of this species did not match any available sequences in GenBank. The lowest genetic distance was 0.017, observed with Ceratomyxa moseri infecting Pomacentrus wardi from Australia’s Great Barrier Reef. A maximum likelihood phylogenetic tree showed a close association between the new species and a variety of ceratomyxid species, including Ceratomyxa arabica reported from the Arabian Gulf. Given the morphological and molecular differences between this species and other Ceratomyxa spp., we proposed the present form was a new species and the name Ceratomyxa mehlhorni sp. n. for this parasite from the gallbladder of G. speciosus.

Keywords

Myxozoa Gallbladder Ceratomyxa SSU rDNA Seasonality 

Notes

Acknowledgments

We extend our appreciation to the Dean of Scientific Research, King Saud University, for funding the work through the research group project number RGP -004.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Lamjed Mansour
    • 1
    • 2
  • Abdel-Azeem S. Abdel-Baki
    • 1
    • 3
  • Hussain A. Al-Qahtani
    • 1
  • Saleh Al-Quraishy
    • 1
  1. 1.Zoology Department, College of ScienceKing Saud UniversityRiyadhSaudi Arabia
  2. 2.Unité de Recherche de Biologie intégrative et Ecologie évolutive et Fonctionnelle des Milieux Aquatiques, Département de Biologie, Faculté des Sciences de TunisUniversité De Tunis El ManarTunisTunisia
  3. 3.Zoology Department, Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt

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