Barbeyella minutissima

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Barbeyella minutissima
Scientific classification Edit this classification
Domain: Eukaryota
Phylum: Amoebozoa
Class: Myxogastria
Order: Echinosteliales
Family: Clastodermataceae
Genus: Barbeyella
Meyl.
(1914)
Species:
B. minutissima
Binomial name
Barbeyella minutissima
Meyl. (1914)

Barbeyella minutissima is a

sporangia are roughly spherical, up to 0.2 mm in diameter, and supported by a thin stalk up to 0.7 mm tall. After the spores have developed, the walls of the sporangia split open into lobes. The species is one of the smallest members of the Myxogastria
and is considered rare.

Taxonomy and classification

The species was first

Stemonitales.[4]

Characteristics

a) sporangium
b) through e) open sporangium
b) from the side; c) and d) from above
e) transparent peridium

The

protoplasmodium, a microscopic, undifferentiated granular mass with a slime sheath, is transparent and colourless. A single sporangiophore (the fruiting structure) is produced from the semispherical protoplasmodium, which is approximately one and a half times the diameter of mature sporangia. It acquires dark spots as it matures and the centre of the protoplasm later becomes dark. Then, the transparent and milk-white protoplasmodium climbs along the stem to the top, where first the capillitium and peridium and finally the spores are produced. At room temperature, this process lasts roughly one day.[5]

The long-stemmed, blackish-brown or blackish-purple, barely translucent sporangia of Barbeyella are spherical, 0.15 to 0.2 mm in diameter and together with the stem measure 0.3 to 0.7 mm long. They are usually scattered on the

capsule.[5] The sporangia are filled towards the top with plasmatic granules, which diminish increasingly towards the base. Depending on the size of the plasmatic granules, the sporangia appear papillate or smooth.[7]

The mass of spores is blackish brown,[6] or brown if viewed under polarised light. The surface texture ranges from almost smooth to warty, and the spores measure 7–9 μm in diameter.[7] Material collected from Oregon, however, varies from European material in several ways: the fruit body is brown; the branching of the capillitium from the columella differs (having primary and secondary branches instead of radiating branches from an expanded tip); the spore mass is tan, and individual spores measure 10–12 μm.[8]

Habitat and distribution

Barbeyella minutissima is considered rare.

Himalayas as well as in Japan.[5] It is relatively common in fir forests on high-altitude Mexican volcanoes, suggesting that air-borne spore dispersal is effective.[12]

Ecology

The species grows only on slightly to heavily rotten and barkless deadwood in coniferous forests in cool, moist areas. The wood is about 40 to 100% overgrown with

Colloderma oculatum.[5] Aphanocladium album is a myxomyceticolous fungus (i.e., living on or within the fruit bodies of myxomycetes) that has been reported growing on specimens of B. minutissima collected from North Carolina.[14]

References

  1. ^ Meylan, Charles (1914). "Myxomycètes du Jura (suite)". Bulletin de la Société botanique de Genève (in French). 6 (2): 86–90.
  2. ^ "Barbey, William (1842–1914)". JSTOR Plant Science. Retrieved 2012-08-19.
  3. ISBN 9780851998268
    .
  4. ISSN 0453-3402
    .
  5. ^
    doi:10.1017/S0953756200002975
    .
  6. ^
    ISBN 3929822008
    .
  7. ^ a b Schinz, Hans (1920). "Die Pilze Deutschlands, Oesterreichs u. d. Schweiz mit Berücksichtigung der übrigen Lander Europas. Part 10". In L. Rabenhorst (ed.). Myxogasteres (Myxomycetes, Mycetozoa) (in German). Vol. 1. pp. 408–410.
  8. JSTOR 3757440
    .
  9. ISBN 9781891276231
    .
  10. ISSN 1392-1665
    .
  11. doi:10.5248/111.91
    .
  12. ISBN 978-90-481-2800-6
    .
  13. JSTOR 2557941
    .
  14. JSTOR 3760706
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Barbeyella_minutissima&oldid=1220314110"