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Abstract
The monotypic genus Lindbladia (Myxomycetes, Liceales, Cribrariaceae) was described by Elias Fries in 1849. The type locality is Södermanland, Sweden, not Germany as given in monographs. There are nine synonyms representing seven different genera recorded for this taxon. We observed the holotype using light and electron microscopy, provided a detailed description, compared its morphology with other specimens assigned to this species, and described the variation attributed to this species based on collections from many parts of the world. The excellent state of holotype preservation is shown in habit photographs and scanning electron micrographs. Other specimens examined resemble the holotype except that the holotype has fewer pigmented dictydine granules present on the inner peridial surface. This is a variable species in its general habit, size of fructification, inner peridial surface markings, and spore color. Birefringence properties were variable for structures of the fruiting bodies. X-ray microanalysis showed the presence of calcium in the dictydine granules. The terms plasmodic granules, dictydine granules, and lime globules used previously in myxomycete literature are reviewed and discussed. Lindbladia is recognized as a monotypic and variable genus most closely related to Cribrarla argillacea. The transfer of Lindbladia cribrarioides to the genus Cribrarla is recognized and discussed.