Ellipsomyxa tucujuensis n. sp. (Myxozoa: Ceratomyxidae), a parasite of Satanoperca jurupari (Osteichthyes: Cichlidae) from the Brazilian Amazon. (August 2021)

• Record Type: Journal Article
• Authors: Ferreira, Roger Leomar da Silva; da Silva, Diehgo Tuloza; de Carvalho, Abthyllane Amaral; Bittencourt, Luana Silva; Hamoy, Igor; Matos, Edilson; Videira, Marcela
• Is Part Of: Parasitology international. Volume 83(2021)
• Publication Date: 2021-08
• Subjects: SSU rDNA -- Fish -- Freshwater -- Parasite; Parasitology -- Periodicals; Parasites -- Periodicals; Parasitic Diseases -- Periodicals; Parasitology -- Periodicals; Parasitologie -- Périodiques; 571.99905
• DOI: 10.1016/j.parint.2021.102332
• Languages: English
• ISSNs: 1383-5769

Abstract

Abstract: The present study describes a new coelozoic, eukaryotic microparasite of the genus Ellipsomyxa Køie, 2003 (Ceratomyxidae: Myxozoa) found parasitizing the gallbladder of Satanoperca jurupari Heckel, 1840 collected in the Curiaú River Environmental Protection Area in Macapá, Amapá state, Brazil. The fish were collected using mesh cast net. The gallbladders were examined, preserved in 80% alcohol for molecular analysis (SSU rDNA gene), and fixed in Davidson for histological slide preparation. The new parasite had a prevalence of 81% in the gallbladder, asymmetric plasmodia, irregular free spores in the bladder fluid, with no cyst formation. The spores are elliptical, with characteristics of the genus Ellipsomyxa, and they had a mean length of 10.11 (8.56–10.5) μm, mean width of 7.81 (5.96–9.56) μm, and thick walls. The polar capsules are sub-spherical in shape, slightly asymmetrical, with a mean length of 3.12 (2.31–3.99) μm and mean width of 2.5 (2.22–2.95) μm, containing polar filament with five or six coils perpendicular to the longitudinal axis of the capsule. The Bayesian Inference assigned the new species to a subclade formed by a lineage of Ellipsomyxa species from the Amazon region. Ellipsomyxa tucujuensis n. sp. is the sixth species of this genus described in fish from the Amazon region, and the first for the state of Amapá. Graphical abstract: Unlabelled Image Highlights: The new species of Ellipsomyxa (Cnidaria: Myxozoa) has been described parasitizing on a cichlid in the Amazon. Ellipsomyxa tucujuensis has been described by parasitizing the gallbladder of Satanoperca jurupari. Satanoperca jurupari is a freshwater host. Ellipsomyxa tucujuensis has an asymmetric and irregular (polysporic) plasmodium.