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Diseases of Aquatic Organisms

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DAO 142:75-82 (2020)  -  DOI: https://doi.org/10.3354/dao03534

Morphological, histological, and molecular aspects of Myxobolus zaikae n. sp., a parasite of the roach Rutilus rutilus, in Lake Baikal

Marina Dashi-Dorjievna Batueva*

Institute of General and Experimental Biology of the Siberian Branch, Russian Academy of Sciences, 670047 Ulan-Ude, Russia
*Corresponding author:

ABSTRACT: A new myxobolid species, Myxobolus zaikae n. sp., was found in the connective tissue near the kidney and liver blood vessels of the common roach Rutilus rutilus, while fish myxosporean fauna were being investigated in Lake Baikal, Russia. The parasites were studied on the basis of spore morphology as well as with histological and molecular methods. Mature spores of M. zaikae n. sp. are round or ellipsoidal in the frontal view and lemon-shaped in the lateral view, measuring 11.37 ± 0.11 µm (10.2-14.0 µm) in length, 10.29 ± 0.10 µm (9.6-11.0 µm) in width, and 6.3 ± 0.08 µm (5.8-7.1 µm) in thickness (mean ± SD; n = 50). Polar capsules are equal and pyriform, measuring 4.5 ± 0.07 µm (3.4-5.2 µm) in length and 2.9 ± 0.03 µm (2.6-3.3 µm) in width. Polar capsules contained polar filaments coiled with 5 to 6 turns. Phylogenetic analysis showed that this newly described species clusters with other myxobolid species infecting the connective tissue of different organs from Palearctic cyprinid fish.


KEY WORDS: Myxobolus zaikae n. sp. · Roach · Kidney · Liver · Lake Baikal


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Cite this article as: Batueva MD (2020) Morphological, histological, and molecular aspects of Myxobolus zaikae n. sp., a parasite of the roach Rutilus rutilus, in Lake Baikal. Dis Aquat Org 142:75-82. https://doi.org/10.3354/dao03534

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