Arcyria margino-undulata Nann, -Bremek et Y. Yamam
  Eumycetozoa   Arcyriaceae   Arcyria


IDnature guide
Overview
Sporocarps scattered, long-stalked, white or pale ochraceous, total height 0.8-1.2 mm. Sporotheca subglobose, (0.15-)0.2(-0.3) mm diam. Stalk c. 75-80% of the total height. Hypothallus small, inconspicuous. Stalk dark brown, ochraceous in TL, longitudinally striate, filled with cysts. Peridium remaining as a small calyculus occupying c. 20% of the sporotheca, ochraceous by TL, the base radiately plicate from a continuation of the stalk plicae, the margin concentrically plicate, with 4-5 undulate plicae, the inside of the calyculus smooth. Capillitium forming a loose, wide-meshed net, with a few attachments to the cup and to the inside of the stalk apex, the tubules irregular from constrictions and inflations, 2-4 Ám diam. without the ornamentation of slender, often capitate, warts which are c. 1 Ám tall in the upper part and somewhat shorter towards the base. Spores nearly colourless, 6.5-7 Ám diam.

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References
  • Nannenga-Bremekamp,N.E., Yamamoto, Y. 1983: Additions to the Myxomycetes of Japan. I. Proceedings.Koninklijke Nederlandse Akademie van Wetenschappen.Ser.C, Biological and medical sciences 86(2): 207-241.

Acknowledgements
The Eumycetozoan Project -- working to understand the ecology, sytematics and evolution of myxomycetes, dictostelids and protostelids -- the true slime molds.

Sponsored by grants from the National Science Foundation.


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