Bivalvulida

Taxobox
name = Bivalvulida "Shulman, 1959"


image_width = 200px
image_caption = "Alataspora solomoni", a member of the order Bivalvulida
regnum = Animalia
phylum = Cnidaria
unranked_classis = Myxozoa
classis = Myxosporea
ordo = Bivalvulida
ordo_authority = Shulman, 1959
subdivision_ranks = Families
subdivision = :Sphaeromyxidae
:Myxidiidae
:Ortholineidae :Sinuolineidae :Fabesporidae :Ceratomyxidae :Sphaerosporidae :Chloromyxidae :Auerbachiidae :Alatasporidae :Parvicapsulidae :MyxobolidaeThe 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. They usually contain 2 polar capsules, but species have been reported which contain either 1 or 4.