Phylogeny and ultrastructure of Myxobolus rangeli n. sp. (Myxozoa, Bivalvulida), a histozoic parasite in Siluriformes fish from the Amazon region

Author:

Silva Marcelo Francisco da1ORCID,Silva Diehgo Tuloza da2ORCID,Giese Elane3ORCID,Furtado Adriano Penha2ORCID,Matos Patricia2,Lima Aline Medeiros3ORCID,Hamoy Igor3ORCID,Matos Edilson4ORCID

Affiliation:

1. Universidade Estadual da Região Tocantina do Maranhão, Brasil

2. Universidade Federal do Pará, Brasil

3. Universidade Federal Rural da Amazônia, Brasil

4. Universidade Federal do Pará, Brasil; Universidade Federal Rural da Amazônia, Brasil

Abstract

Abstract A new species of Myxobolus parasitizing the arterial bulb and cardiac musculature of the freshwater fish Pimelodus ornatus Kner, 1858, from the Arari river in the municipality of Cachoeira do Arari, island of Marajó, Pará, Brazil, was described. In the present study, the observed prevalence of myxozoan parasites in the heart tissue of the hosts was 20% (6/30). The myxozoans observed had mature biconvex spores, slightly rounded, an anterior end with two pyriform polar capsules and a posterior end with very evident sporoplasm, measuring 8 ± 0.2 μmin length. The spore width was 5.8 ± 0.4 μm, with a thickness of 3.4 ± 0.2μm. The length of the polar capsules was 3.6 ± 0.3 μm and the width was 1.2 ± 0.2μm, with 6 to 7 turns of the polar filament. The divergences observed, regarding the morphometric and genetic structure of SSU rDNA, in relation to other Myxobolidae already described in the literature, confirm the description of the new species Myxobolus rangeli n. sp.

Publisher

FapUNIFESP (SciELO)

Subject

General Veterinary,Parasitology

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