Aspergillus siamensis sp. nov. from soil in Thailand

A new species of Aspergillus section Fumigati, Aspergillus siamensis, isolated from coastal forest soil in Samaesarn island, Chonburi province, Eastern Thailand, is described and illustrated. This species is characterized by its broadly lenticular ascospores with two wide equatorial crests and finely spinulose and rugose convex surfaces and produced pale pinkish exudates after 14 d incubation on Czapek agar. The validation of this new species was supported further by analyses of the β-tubulin, calmodulin and actin gene sequences.

► A new species, Aspergillus siamensis isolated from soil in Thailand, is described and illustrated.
► This species is characterized by its broadly lenticular ascospores with two wide equatorial crests and finely spinulose and rugose convex surfaces.
► The ascospores ornamentation was somewhat similar to those of N. paulistensis.
► This species is related to N. aureola, N. indohii and N. udagawae on phylogeny.