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Ultrastructural Studies of Henneguya rhamdia n. sp. (Myxozoa) a Parasite from the Amazon Teleost Fish, Rhamdia quelen (Pimelodidae)
Author(s) -
MATOS EDILSON,
TAJDARI JESSICA,
AZEVEDO CARLOS
Publication year - 2005
Publication title -
journal of eukaryotic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 1066-5234
DOI - 10.1111/j.1550-7408.2005.00063.x
Subject(s) - polar filament , biology , myxozoa , ultrastructure , anatomy , spore , myxobolus , parasite hosting , polar body , zoology , myxosporea , gill , fish <actinopterygii> , microsporidia , fishery , paleontology , embryo , world wide web , computer science , oocyte
.Henneguya rhamdia n. sp. is described in the gill filaments of the teleost fish Rhamdia quelen , collected from the Peixe Boi River, State of Pará, Brazil. This myxosporean produced spherical to ellipsoidal plasmodia, up to 300 μm in diameter, which contained developmental stages, including spores. Several dense bodies up to 2 μm in diameter were observed among the spores. The spore body was ellipsoidal (13.1 μm in length, 5.2 μm in width, and 2.5 μm in thickness) and each of the two valves presented a tapering tail (36.9 μm in length). These valves surrounded the binucleated sporoplasm cell and two equal ellipsoidal polar capsules (4.7 × 1.1 μm), which contained 10–11 (rarely 12) polar filament coils. The sporoplasm contained sporoplasmosomes with a laterally eccentric dense structure with a half‐crescent section. Based on the data obtained by electron microscopy and on the host specificity, the spores differed from previously described Henneguya species, mainly in their shape and size, number and arrangement of the polar filament coils, and sporoplasmosome morphology.