Slime Moulds


Slime moulds are a diverse group of organsims that are neither plants, animals nor fungi. They spend most of their life as microscopic single-celled amoeboid individuals in leaf litter, soil or decaying wood, and when conditions are right they reproduce and form a larger, spreading structure called a plasmodium, which in turn produces fruiting bodies (Secretive Slime Moulds: Myxomycetes of Australia By Steven L. Stephenson). 

For beginners, here is a “A Key to Common Genera of Slime Moulds” written and illustrated by Peta McDonald, a Melbourne primary school teacher: https://upload.wikimedia.org/wikipedia/commons/f/f6/A_Key_to_Common_Genera_of_Slime_Moulds.pdf

A more technical key can be found in “Taxonomic Keys and Plates from The Myxomycetes”, a book by George W. Martin and Constantine J. Alexopoulos: https://www.myxotropic.org/wp-content/uploads/2021/04/MyxoKeys.pdf

For a photo gallery of slime moulds from around the world check out this one on a Spanish myxomycetes website: https://www.myxotropic.org/galeria/

Further information: 


Slime Moulds

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Discussion

Heinol wrote:
Yesterday
Quite a nicet set of photos showing the very begginings of fruitbody development with plasmodium still present.

Myxomycete - past plasmodial stage
Heinol wrote:
Yesterday
This is a slime mould. On the fence you see an excellent example of the fanning out growth during the mobile, feeding stage. Given the white-shelled fruitng bodies, with the dark spores inside, I'd guess this is a Physarum but @Teresa could offer a more auhtoritative opinion.

Physarum sp. (genus)
TimL wrote:
11 Dec 2025
Thanks for the identification and advice @Teresa

Reticularia sp. (genus)
Teresa wrote:
11 Dec 2025
Reticularia lycoperdon, a slime mould which forms a relatively large, single, fruiting body called an aethalium, it hardens and then eventually splits to release a brown mass of spores.

Reticularia sp. (genus)
CathB wrote:
5 Dec 2025
Possibly a slime mould

Reticularia sp. (genus)
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