Amanita malayensis is molecularly well-defined
without close phylogenetic relatives in the Asian
mycota. Based on the data presented in this study, its
closest phylogenetic relatives are A. javanica, A. rubromarginata,
and Amanita sp. 1
This fungus has only been recorded growing in association with Hopea odorata (Dipterocarpaceae) from one location in a popular public park.
In Malaysia, it has only been found growing in small groups among planted Hopea odorata (Dipterocarpaceae) in a public park in the state of Perak. According to GenBank data (ITS: AB451969, AB458887), this taxon occurs in Thailand and is misidentified as A. hemibapha subsp. javanica. In Thailand, it is reported as an ectomycorrhizal fungus in dipterocarp forest.
Population Trend: Uncertain
The fungus grows in small groups on soil under dipterocarps. In Malaysia, it was collected from the same location in the public park during the months of July and March, in 2007 and 2008, respectively.
Comprehensive surveys and inventories for the region are needed to determine the occurrence and distribution of the fungus.
Li-Ping Tang, Su-See Lee, Nian-Kai Zeng, Qing Cai, Ping Zhang & Zhu L. Yang (2017): Notes on Amanita section Caesareae from Malaysia, Mycologia, DOI:10.1080/00275514.2017.1394789