what is a fungi that doesnt fit into the other standard groups of fungi?

Since this is not my area of expertise, I searched Google under the key words "fungi grouping exception" to get these possible sources:

http://www.bioimages.org.uk/html/T74.HTM
http://www.nifg.org.uk/species/atlas.htm
(Broken Link Removed)

I hope this helps. Thanks for asking.