Oligonema

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Oligonema
Oligonema schweinitzii

Oligonema schweinitzii

Systematics
without rank: Amorphea
without rank: Amoebozoa
without rank: Myxogastria
Order : Trichiida
Family : Trichiidae
Genre : Oligonema
Scientific name
Oligonema
Rostaf.

Oligonema is a genus of slime molds from the order of the Trichiida . It is distributed worldwide and includes six species, mostly very humid locations.

features

The mostly quite small, sessile fruiting bodies are usually sporocarps , occasionally short plasmodiocarps and are usually found in loose to dense groups, sometimes with additional, isolated sporocarps. They are yellow to brown, green to brown shades of color can occur.

The peridium is membranous, thin and yellowish translucent, rarely iridescent , its surface is finely warty or papilous on the inside . The capillitium consists of individual, non-overgrown yellow threads ( elaters ), which are warty, papilose, prickly, ring-shaped or spirally sculpted and can be simply branched. Their outer ends are usually rounded, blunt and club-shaped, spiked once or twice and occasionally enlarged in a ring at the base of the outer end. The round to irregularly elliptical spores are yellow to orange, their surface warty or reticulate.

distribution

Oligonema is widespread worldwide, with Oligonema dancoi a species has even been found in the Antarctic. The species colonize very humid environments such as marshland or the banks of ponds and streams. They are mostly found on dead wood , but also on moss or in mud. It is believed that their plasmodia are aquatic. The most common and widespread species is Oligonema schweinitzii .

Systematics and research history

The genus was first described in 1875 by Józef Tomasz Rostafiński , the type species was originally the Oligonema nitens described by Marie-Anne Libert in 1834 as Trichia nitens . This, however, was the 1947 by George Willard Martin to Oligonema asked Physarum schweinitzii (1873 Miles Joseph Berkeley firstdescribed) synonymised, type species is so Oligonema schweinitzii . The genus includes six species:

proof

Footnotes directly behind a statement cover the individual statement, footnotes directly behind a punctuation mark the entire preceding sentence. Footnotes after a space refer to the entire preceding paragraph.

  1. ↑ a b c d Myriam de Haan, Sylvia De Pauw, Ann Bogaerts: A Study of the Genus Oligonema (Myxomycota) in Belgium In: Systematics and Geography of Plants, 74: 2, 2004, pp. 251-260
  2. ↑ Michael J. Dykstra, Harold W. Keller: Mycetozoa In: John J. Lee, GF Leedale, P. Bradbury (Eds.): An Illustrated Guide to the Protozoa . tape 2 . Allen, Lawrence 2000, ISBN 1-891276-23-9 , pp. 968 .
  3. ^ Marie L. Farr: Myxomycetes . In: Flora Neotropica . tape 16 . The New York Botanical Garden, New York 1976, ISBN 0-89327-009-1 , pp. 66-67 .