Redescription of Myxobolus pyramidis Chen, 1958(Myxosporea: Bivalvulida)

Abstract

Redescription of Myxobolus pyramidis Chen, 1958, from gill lamellae of allogynogenetic gibel carp, Carassius auratus gibelio (Bloch), is presented in this paper to complete Chen's description. The diagnostic characters of the myxosporidia are: ovoid round, greyishwhite polysporous plasmodia, averaging (159±21)×(72± 6.5) μm in size; spore pyriform in front view with smooth surface and symmetrical valves, convex-shaped in sutural view with straight and thick sutural line, averaging (10.5±1.1)×(10.3±0.9)×(6.1±0.2) μm in size; two equal pyriform polar capsules averaging (5.5±0.7)× (3.5±0.2) μm in size with distinct intercapsular process and polar filament wounded in five to six coils. The histological effects of the pathogen were observed by light microscopy, and the parasite-host relationship was discussed.

Myxobolus honghuensis n. sp. (Myxosporea: Bivalvulida) parasitizing the pharynx of allogynogenetic gibel carp Carassius auratus gibelio (Bloch) from Honghu Lake, China

“…Case in point, 15 Myxobolus species have been found from different tissues and organs of the allogynogenetic gibel carp Carassius auratus gibelio (Bloch; Eiras et al 2005;Liu et al 2010a;Zhang et al 2010a, b). Gibel carp, a triploid gynogenetic species, has been bred with faster growth potential and introduced into aquaculture as an important commercial fish species in China since the early 1980s (Zhou et al 2001;Zhang et al 2005). Minimizing the impact of parasites in this commercially important species is considered a priority.…”

Thelohanellus wangi n. sp. (Myxozoa, Myxosporea), a new gill parasite of allogynogenetic gibel carp (Carassius auratus gibelio Bloch) in China, causing severe gill myxosporidiosis

“…Reducing the severe negative effects of the myxosporidiosis on this commercially important species has been considered a priority in China. Until now, more than 40 myxosporean species belonging to Myxobolus, Thelohanellus, Hennegua, Sphaerospora, Myxidium, Myxobilatus, Hoferellus, Chloromyxum, Zschokkella and Unicauda genera have been found in allogynogenetic gibel carp, with high diversity of infection habitats (Xiao 1988;Chen and Ma 1998;Zhang et al 2006;Zhao et al 2008;Zhang et al 2010a, b;Liu et al 2012;Zhao et al 2013;Liu et al 2014a, b;Ye et al 2014). These myxosporean parasites can infect almost all stages of a whole culture cycle of this fish.…”

Updated morphology, histopathology and molecular phylogeny of Myxobolus hearti, cardiac myxosporea in gibel carp, Carassius gibelio (Bloch)

“…; Zhang et al . , ). Even less data are available on the pathophysiology caused by the myxozoan disease and its control measures.…”