Physarum aeneum
| Physarum aeneum | ||||||||||||
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| Physarum aeneum | ||||||||||||
| ( A. Lister ) REFr. , 1903 |
Physarum aeneum is a slime mold species from the order of physarales . It is one of the few species of slime mold that can be found mainly in the tropics and subtropics.
features
The plasmodium of Physarum aeneum is black, the fruiting bodies are mostly extended over several centimeters and accumulating in groups, so-called plasmodiocarps , which can be simple, branched or reticulated. They are colored from pink to brown, light olive, gray or bronze, have a shiny or shimmering surface and a diameter of 0.3 to 0.4 millimeters. Often the plasmodiocarp is still surrounded by sessile, approximately round sporangia .
The membranous hypothallus is barely larger than the plasmodiocarp and dark brown to blackish. The peridium is double-layered: the outer layer, which occasionally has lime nodules, is brittle, cartilaginous, wrinkled and shiny to matt, the membranous inner layer is iridescent.
The reticulated, dense capillitium consists of transparent threads that connect small, rounded to angular, light yellow to medium brown, occasionally whitish colored lime nodules. The almost smooth to finely prickly spores with a diameter of 7 to 9 (rarely 6 to 10) micrometers are brown in bulk, individually pale purple or purple-brown in transmitted light, occasionally groups of larger, dark warts can be found on them.
distribution
Physarum aeneum is native to North America, the West Indies, and South America. A single find exists from Taiwan. The species colonizes dead wood and leaves, on piles of light brown leaves they often form larger colonies of conspicuous, dark brown networks.
Systematics
The holotype was collected on palm leaves in Dominica in 1896 or 1897 , first described by Arthur Lister in 1898 as a variety of Physarum murinum and set up as a separate species by Robert Elias Fries in 1903.
proof
- ↑ a b c d e Marie L. Farr: Myxomycetes . In: Flora Neotropica . tape 16 . The New York Botanical Garden, New York 1976, ISBN 0-89327-009-1 , pp. 121 .
- ^ Robert Hagelstein: The Mycetozoa of North America , 1944, p. 73
- ↑ Chin-Hui Liu & Chao-Hsuan Chung: Myxomycetes Of Taiwan VII: Three New Records Of Physarum In: Taiwania 38: 91-98, 1993