2013/06/15 by Carlos Azevedo, Marcela Nunes Videira, Graça Casal +4 · 1 citation
Biochemistry, Genetics and Molecular Biology · Environmental Science · #Anatomy #Aquatic Invertebrate Ecology and Behavior #Biology #Fish <Actinopterygii> #Fishery #Gallbladder #Geometry #Long axis #Marine Ecology and Invasive Species #Myxosporea #Myxozoa #Myxozoan Parasites in Aquatic Species #Paleontology #Polar filament #Teleostei
paper · doi:10.1111/jeu.12056
openalex publication_date 2013/06/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/27
A fish infecting myxosporean Ellipsomyxa gobioides n. sp. is described in the gallbladder of the Amazonian dragon fish Gobioides broussonnetii. Irregular disporous plasmodia (up to ~30 μm in diameter) with long branched and anastomosed pseudopodia were found attached to the gallbladder wall. Mature ellipsoid myxospores occurring floating in the bile measured 6.8 (6.5-7.0) μm (n = 30) long, 7.2 (6.9-7.5) μm (n = 15) wide, and 13.1 (12.8-13.5) (n = 25) thick. They had smooth thin valves elongated in the direction perpendicular to the plane of the straight central transverse sutural line. The two ellipsoidal polar capsules (PC) opened some distance from the sutural line on opposite sides, each measuring 4.6 (4.3-4.8) μm (n = 15) long and 2.5 (2.1-2.7) μm (n = 20) wide. Distance between PC 3.5 (3.1-3.8) μm (n = 15) in apical view. The polar filament was isofilar and consisted of a single coil with five or six turns. The objective of this study was to characterize this new species based on its morphological differences from the three previously described species. This is the first reported species of genus Ellipsomyxa from among the South American fauna.