Morphology and small subunit rDNA-based phylogeny of a new Henneguya species, infecting the ornamental fish Corydoras leucomelas from the Peruvian Amazon

Author(s)

Mathews, Patrick D. ^[1] ; Naldoni, Juliana ^[2] ; Adriano, Edson A. ^{[1, 2]}

Affiliation

^[1] Univ Campinas UNICAMP, Inst Biol, Dept Anim Biol, Ave Bertrand Russel, S-N Cx 6109, BR-13083970 Campinas, SP - Brazil

^[2] Fed Univ Sao Paulo UNIFESP, Dept Ecol & Evolutionary Biol, Rua Prof Arthur Riedel, 275 Jardirn Eldorado, BR-09972270 Diadema, SP - Brazil

• Document type: Journal article
• Source: Acta Tropica; v. 176, p. 51-57, DEC 2017.
• Web of Science Citations: 6

Abstract

A new species of Myxosporea, Henneguya loreotoensis n. sp. is described parasitizing the gill filaments from 17 of 35 specimens (48.5%) of Corydoras leucomelas (Siluriformes: Callichthyidae) caught in the Nanay River, near village Ninarumi, in the Loreto state, Peru. Mature spores were ellipsoidal in shape from the frontal view, measuring 36.2 +/- 0.1 mu m (36.1-36.3) in total length, 14.3 +/- 0.1 mu m (14.2-14.4) in body length, 5.1 +/- 0.1 mu m (4.9-5.3) in width and 21.9 +/- 0.1 mu m (21.8-22.0) in the caudal process. The two polar capsules were symmetrical and elongated, measuring 5.1 +/- 0.1 mu m (4.9-5.3) in length and 2.4 +/- 0.2 mu m (2.1-2.7) in width, containing a polar filament with five coils arranged obliquely to the longitudinal axis. The sporoplasm was binucleate. Partial sequencing of the ssu-rDNA of H. loretoensis n. sp. resulted in a total of 1676 nucleotides, and this sequence did not match any of the myxozoan available in the GenBank. The phylogenetic analysis shows H. loretoensis n. sp. as a sister species of Henneguya paraensis, another amazonian myxozoan parasite of Cichla temensis (Perciformes: Cichlidae). (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