Myxobolus lubati n. sp. (Myxosporea: Myxobolidae), a new parasite of haffara seabream Rhabdosargus haffara (Forsskal, 1775), Red Sea, Egypt: a light and transmission electron microscopy

Abstract

A new myxosporean parasite, Myxobolus lubati n. sp., was described from the wall of the intestine of haffara seabream Rhabdosargus haffara (Forsskal 1775), Red Sea, Egypt. Macroscopic plasmodia of about 300 mum diameter were located in the circular muscle layer of the intestine. The spores were ovoid and sometimes ellipsoid and measured 9.8 x 7.2 mum. The shell wall of the spore was thickened at the posterior end and marked with 5-7 sutural markings. Polar capsules were equal and pyriform with three polar filament turns situated in the posterior half of the polar capsule. Polar capsules measured 4.2 x 1.6 mum. Histological evaluation of the infection revealed a slight distention of the intestinal layer of muscularis. Ultrastructure of the plasmodial wall and sporogenesis of the present species followed the usual pattern valid for most studied myxosporean species.

Myxobolus supamattayai n. sp. (Myxosporea: Myxobolidae) from Thailand parasitizing the scale pellicle of wild mullet (Valamugil seheli)

“…The presented mature spores and polar capsule were plugged with a stopper, which was covered by a cap-like structure at its apical end. These characters were similar to those recorded for the genus Myxobolus (Ali et al 2007) and also from other myxosporean genera such as Sphaerospora (Supamattaya et al 1991) and Zschokkella (Lom and Dyková 1996). The sporoplasm cell of genus Myxobolus is commonly characterized by a single binucleated sporoplasm (Pulsford and Matthews 1982;Bahri and Marques 1996).…”

Light and electron microscopic studies on Myxobolus egyptica sp. nov. (Myxozoa, Myxosporea), infecting the hornlip mullet Oedalechilus labiosus from the Red Sea

“…The glycogen accumulation noticed in the sporoplasm of the present species was similar to that reported by El-Matbouli et al (1990) and Ali et al (2007). A few rounded dark inclusions (sporoplasmosomes) were infrequently observed in the present sporoplasm similar to those reported by some authors (Canning et al 1999, Ali et al 2007). The spores of Bivalvulida are essentially composed of two shell valves.…”

Henneguya cuniculator sp. nov., a parasite of spotted sorubim Pseudoplatystoma corruscans in the São Francisco Basin, Brazil

“…The sporogenesis process of H. cuni culator sp. nov. was similar to those observed in other species of Henneguya (Matos et al 2005, Ali et al 2007, Abdel-Ghaffar et al 2008, Azevedo et al 2008, Naldoni et al 2009, Barassa et al 2012. However, the plasmodia of H. cuniculator sp.…”