Morphology and small subunit rDNA-based phylogeny of Ceratomyxa amazonensis n. sp. parasite of Symphysodon discus, an ornamental freshwater fish from Amazon

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• 作者：Patrick D. Mathews ; Juliana Naldoni ; Antonio A. Maia…
• 关键词：Systematic ; Myxozoa ; Myxosporea ; Fish parasite ; Ornamental fish ; Ceratomyxidae evolution
• 刊名：Parasitology Research
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：115
• 期：10
• 页码：4021-4025
• 全文大小：471 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Medical Microbiology
  Microbiology
  Immunology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1955
• 卷排序：115

文摘

The specious genus Ceratomyxa Thélodan, 1892, infect mainly gallbladder of marine fishes, with only five species reported infecting species from freshwater environment. This study performed morphological and phylogenetic analyses involving a new Ceratomyxa species (Ceratomyxa amazonensis n. sp.) found in gallbladder of Symphysodon discus Heckel, 1840 (Perciformes: Cichlidae), an important ornamental fish endemic to Amazon basin. Mature spores were strongly arcuate shaped and measured 7.0 ± 0.3 (6.2–7.6) μm in length, 15.8 ± 0.4 (15.0–16.7) μm in thickness, and polar capsules 3.22 ± 0.34 (2.4–3.6) μm in length and 2.63 ± 0.17 (2.4–2.9) μm in width. This was the first small subunit ribosomal DNA (SS rDNA) sequencing performed to Ceratomyxa species parasite of freshwater fish, and the phylogenetic analysis showed C. amazonensis n. sp. clustering in the early diverging subclade of the ceratomyxids, together with species of parasites of amphidromous/estuaries fishes, suggesting some role of the transition of the fishes between marine/freshwater environments in the evolutionary history of these parasites.