Family: Didymiaceae
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Protozoa:> Myxomycota:> Myxomycetes:> Physarale:> Didymiaceae:> Diderma, Didymium.
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The Didymiaceae family, like all members of the Physarales order are distinguished by the presence of crystalline lime. Which is restricted to the peridium in the form of crystals or disks. Spores are typically dark brown to dark purple-brown.

 
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Genus: Diderma
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Sporangia stalked, sessile, or forming plasmodiocarps; sporangial wall normaly of two layers, containing deposits of lime in granules. Columella usually present, threads of the capillitium simple or branched, without lime. 
Diderma cinereum
Diderma cinereum
Diderma crustaceum
Diderma crustaceum
Diderma effusum
Diderma effusum

Diderma radiatum
Diderma radiatum
 
Diderma hemisphaericum
Diderma hemisphaericum
Diderma ochraceum
Diderma ochraceum
   
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Genus: Didymium
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Sporangia stalked, sessile, or forming plasmodiocarps; sporangia wall membranous or cartilaginous, with superficial crystals of lime either scattered over the surface or combined into a separable crust. Capillitium of branching threads, which are thickened at intervals with dark calyciform nodes, in normal developments without lime.5 
Didymium bahienseDidymium bahiense
Didymium dubiumDidymium difforme
Didymium listeri Didymium listeri
Didymium iridis
 
Didymium melanospermumDidymium melanospermum
Didymium squamulosumDidymium squamulosum
Didymium squamulosumDidymium vaccinum   
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