Kingdom: Protista
Phylum: Amoebozoa
Class: Eumycetozoa
Subclass: Myxogastria
Order: Trichiida
Family: Trichiaceae
Genus: Trichia
As of June 2015, there are 34 species in the genus Trichia.
The photos below are of the same group of Trichia slime mould growing inside a hollow, rotten log. Photos were taken over several days. It was first white then changed colour.
A day later
[2]
For more photos of types of slime moulds visit:
https://www.disjunctnaturalists.com/slime-mould-log/images-1.htm
Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/