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

Author(s)

Mathews, Patrick D. ; Naldoni, Juliana ; Maia, Antonio A. ; Adriano, Edson A.

• Document type: Journal article
• Source: Parasitology Research; v. 115, n. 10, p. 5-pg., 2016-10-01.

Abstract

The specious genus Ceratomyxa Thelodan, 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 (6.27.6) mu m in length, 15.8 +/- 0.4 (15.0-16.7) mu m in thickness, and polar capsules 3.22 +/- 0.34 (2.4-3.6) mu m in length and 2.63 +/- 0.17 (2.4-2.9) mu m 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. (AU)

• FAPESP's process: 13/14656-5 - Systematics and host-parasite interaction of myxosporean parasites of ornamental fish from the Amazon Basin
• Grantee: Patrick Mathews Delgado
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/22700-7 - Systematic and host-parasite relationship of myxosporean parasites of Pimelodidae family fish in the Amazon Basin
• Grantee: Juliana Naldoni
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/21374-6 - Systematics and host-parasite interaction of parasites of the phylum Myxozoa in fishes economically important in Amazon Basin
• Grantee: Edson Aparecido Adriano
• Support Opportunities: BIOTA-FAPESP Program - Regular Research Grants