Molecular and morphological descriptions of Ceratomyxa collarae n. sp. and Ceratomyxa leucosternoni n. sp. from marine ornamental fishes of Indian waters

Sanil, N K and Chandran, Archana and Shamal, P and Binesh, C P (2017) Molecular and morphological descriptions of Ceratomyxa collarae n. sp. and Ceratomyxa leucosternoni n. sp. from marine ornamental fishes of Indian waters. Parasitology Research, 116 (2). pp. 529-537. ISSN 1432-1955

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Abstract

Two novel species of Ceratomyxa infecting marine ornamental fishes from Indian waters are described. Marine ornamentals, Chaetodon collare and Chaetodon decussatus, collected from Vizhinjam, along the southwest coast of India and Acanthurus leucosternon collected from Lakshadweep islands ofArabian Sea revealed Ceratomyxa infections in their gall bladders. Mature spores of Ceratomyxa from Chaetodon collare and Chaetodon decussatus were elongate and slightly crescentic, with rounded ends, and measured 5.20± 0.32 μm in length and 16.32 ± 1.29 μm in thickness. Polar capsules spherical, equal in size and measured 2.23 ± 0.16 μm long and 2.24± 0.20 μm wide. Posterior angle measured 157.75 ± 8.650. Principle Component Analysis and molecular analysis using partial SSUrDNA sequences showed the isolates from these two hosts to be identical. Morphological, morphometric and molecular analysis using partial SSUrDNA sequences revealed the taxonomic novelty of isolates and are hence treated as Ceratomyxa collarae n. sp. Mature spores of Ceratomyxa from Acanthurus leucosternon were elongate, slightly tapering with rounded ends, and measured 7.34 ±0.92 μm in length and 24.37 ± 2.34 μm in thickness. Shell valves were equal, joined by a narrow suture line. Polar capsules spherical in shape, equal in size, 2.59±0.32 μm long and 2.46 ± 0.32 μm wide, and polar filament measured 18.68 ±2.54 μm. Based on morphological, morphometric and molecular analyses, the present species of Ceratomyxa is distinct, considered as a new species and named Ceratomyxa leucosternoni n. sp. The paper also discusses the prevalence of the recovered parasites and host specificity of Ceratomyxa collarae n. sp.

Item Type: Article
Uncontrolled Keywords: Ceratomyxa collarae n. sp.; Ceratomyxa leucosternoni n. sp.; Marine ornamental fish; Myxosporeans Spores; Indian waters
Subjects: Fish Biotechnology > Microbiology
Aquaculture > Ornamental Fishes
Fish Biotechnology
Fish Diseases
Divisions: CMFRI-Kochi > Marine Biotechnology
Subject Area > CMFRI > CMFRI-Kochi > Marine Biotechnology
CMFRI-Kochi > Marine Biotechnology
Subject Area > CMFRI-Kochi > Marine Biotechnology
Depositing User: Arun Surendran
Date Deposited: 15 Jul 2017 06:44
Last Modified: 15 Jul 2017 06:44
URI: http://eprints.cmfri.org.in/id/eprint/11998

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