Buglossoporus magnus is a rare species of poroid fungus in the family Fomitopsidaceae.

Recorded from only three locations in old growth lowland rainforest of Peninsular Malaysia, it is considered a vulnerable species by the IUCN.

[1] The large, orange-pinkish fruit bodies of the fungus–measuring 60 cm (24 in) wide–were discovered by British mycologist E.J.H.

He noted "I met this massive fungus but once, on a large, slowly decomposing, fallen trunk that I had often passed by in previous years."

The holotype specimen was found in a forest reserve in Bukit Timah, Singapore.