Abstract
Sporangial heads of the pollen organ Permotheca from the Lower Permian or Tschekarda, the Urals, are described as semisynangiate, with sporangia proximally connate for about one-third to half their length. The sporangial walls are three-layered and vascularized. The pollen grains, studied with LM, SEM and TEM are transitional protomonosaccate-bilobed to protobisaccate, sulcate, with alveolar infrastructure, lamellate nexine, and a tryphine-like surface layer. Chitrid zoosporangia occur in the pollen grains. The similarity to Idanothekion in the sporangial and pollen morphology may indicate phylogenetic relationships.
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