Bivalvulida

Bivalvulida is an order of myxosporean parasites which contains a number of species which cause economically significant losses to aquaculture and fisheries, such as Myxobolus cerebralis and Ceratomyxa shasta.

The Myxosporean stages of members of the bivalvulida are characterised by their two spore valves (hence the name), which meet in a "suture line" which encircles the spore.

[citation needed] The order Bivalvulida is composed of three suborders and thirteen families.

[1] Drawings and scanning electron microscopy of species of Chloromyxum

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