Morphometeric criteria and partial sequence of the 18S rRNA gene of Ceratomyxa sultani n. sp. from the gallbladder of Upeneus margarethae in the Arabian Gulf,with a note on its seasonal prevalence |
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| Authors: | Abdel-Azeem S. Abdel-Baki Hussain A. Al-Qahtani Esam Almalki Saleh Al-Quraishy Ali Al Ghamdi Lamjed Mansour |
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| Affiliation: | 1. Zoology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;2. Zoology Department, Faculty of Science, Beni-Suef University, Egypt;3. Department of Medical Laboratory, College of Applied Medical Sciences, Majmaah University, Saudi Arabia;4. Biology Department, College of Science, Al Baha University, Al Baha, Saudi Arabia;5. Unité de Recherche de Biologie intégrative et Écologie évolutive et Fonctionnelle des Milieux Aquatiques, Département de Biologie, Faculté des Sciences de Tunis, Université De Tunis El Manar, Tunisia |
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| Abstract: | This paper describes a new coelozoic myxosporean parasite named Ceratomyxa sultani n. sp. isolated from the gallbladder of Upeneus margarethae sourced from the Arabian Gulf off Saudi Arabia. Of 104 U. margarethae specimens examined, 27 (26%) were infected, with the highest prevalence in winter and lowest in autumn. The pseudoplasmodia were disporous and irregularly elliptical in shape, with an average size of 22?×?17?μm. Mature spores were mostly elliptical with symmetrical valves and equal spherical polar capsules. Spores were 9?µm in length and 25?µm in thickness, while polar capsules were 4?µm wide with four filament coils. The paper further provides a morphological comparison with closely related Ceratomyxa spp. together with phylogenetic analysis based on the partial 18S rRNA sequence, which revealed that C. sultani n. sp. clustered within a robust clade of Ceratomyxa species from the Arabian Gulf and Red Sea or nearby geographic regions. |
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| Keywords: | Myxosporea Coelozoic Phylogeny Seasonal variation |
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