Ramirez-Ortega JM, A. Estrada-Torres y E. De Luna. 2017

A comparative SEM study of morphological characters in Cribraria. MYCOTAXON 132 (2): 391-419.

Abstract—Cribraria spp. were examined by SEM to determine detailed morphological features of the spore, nodes, and calyculus and to identify and describe the characters and character states for each microstructure examined. The character states defined include six for spore ornamentation (warted, crested, spiny, subreticulate, banded-reticulate, grooved-reticulate), three for node types (rounded, enlarged, irregular), and four for the upper calyculus margin (ribbed, irregular, toothed, entire). Our SEM studies show that interpretations of spore ornamentation character states based solely on LM may be incorrect and that SEM observations are crucial for discovering new characters and interpreting taxonomic morphological features.

Key words—Cribrariaceae, morphology, myxomycetes, plasmodial granules, slime molds.

Plate 8. Cribraria purpurea. a. Peridial net; b. Nodes flattened without free ends; c. Spores with
surface ornamentation composed of crests; d. Spores and plasmodic granules. Cribraria rubiginosa.
e. Flattened node with spores and plasmodic granules; f. Inner surface details of calyculus; g. Spore
details of surface ornamentation showing warts and a reticulum groove crossing the spore; h. Spore
seen in angular view. Scale bars: a =100 μm; b = 20 μm; c, d = 2 μm; e, f = 10 μm; g, h = 1 μm.