Folia Parasitologica, vol. 62 (2015)

Folia Parasitologica 62:010 (2015) | 10.14411/fp.2015.010

Kudoa saudiensis sp. n. (Myxosporea: Multivalvulida) infecting oocytes of the Indian mackerel Rastrelliger kanagurta (Perciformes: Scombridae)

Lamjed Mansour1,2, Abdel Halim Harrath1, Abdel-Azeem S. Abdel-Baki1,3, Saleh Alwasel1, Saleh Al-Quraishy1, Suliman Y. Al Omar1
1 Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia;
2 Unité de Recherche de Biologie Intégrative et Ecologie Évolutive et Fonctionnelle des Milieux Aquatiques, Département de Biologie, Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunisia;
3 Zoology Department, Faculty of Science, Beni-Suef University, Egypt

During a survey the occurrence of Kudoa quraishii Mansour, Harrath, Abd-Elkader, Alwasel, Abdel-Baki et Al Omar, 2014, recently identified in the muscles of the Indian mackerel, Rastrelliger kanagurta (Cuvier), a species of Kudoa Meglitsch, 1947 infecting oocytes of mature females of the same host fish was found. The new species, for which the name Kudoa saudiensis sp. n. is proposed, infects oocytes that are enlarged with a whitish colour. The parasite develops in vesicular polysporous plasmodia within the oocyte. Infection occurs with a mean prevalence of 20% (7/35) of examined females. Mature spores are quadratic in shape in apical view, having four equal valves and four symmetrical polar capsules. Fresh spores are 2.4-3.6 µm long (mean ± SD 3.1 ± 0.3 µm), 4.3-5.4 µm (4.7 ± 0.3 µm) wide and 3.4-4.3 µm (3.8 ± 0.3 µm) in thickness and long. The smaller size of the new Kudoa species was the distinctive feature that separates it from all previously described species. Molecular analysis based on the SSU rDNA sequences shows that the highest percentage of similarity of 98.5% was observed with K. ovivora Swearer et Robertson, 1999, reported from oocytes of labroid fish from the Caribbean coasts of Panama. The percentage of similarity was 98% with K. azevedoi Mansour, Thabet, Chourabi, Harrath, Gtari, Al Omar et Ben Hassine, 2013 and 89% with K. quraishii. Phylogenetic analysis of the SSU and LSU rDNA data revealed a consistent of the new species with K. azevedoi and K. ovivora. Our findings support the creation of Kudoa saudiensis sp. n. that infects oocytes of the Indian mackerel Rastrelliger kanagurta.

Keywords: Myxozoa, ultrastructure, phylogeny, Red Sea, Saudi Arabia

Received: January 25, 2014; Accepted: September 21, 2014; Published online: January 29, 2015


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