THAILAND. Prachuap Khiri Khan Province, near 12°30.19'N, 99°31.35'E, on decaying wood submerged in a freshwater stream, 25 December 2014, J. van Strien, Site 5-5-1 (MFLU 15-1164), living culture MFLUCC 15-0629 (Additional SSU sequence GenBank MH381760).

Phylogenetic analyses indicated the isolate Dictyosporium sp. (MFLUCC 15-0629) was placed as sister taxon to D. digitatum (KH 401), D. aquaticum (MF 1318) and D. stellatum (CCFC 241241) with good support. The strain D. digitatum (KH 401), D. aquaticum (MF 1318) and our strain MFLUCC 15-0629, showed the same nucleotide (490 bp) between them for ITS gene regions, while there is only one nucleotide difference between our strain and D. stellatum (CCFC 241241). However, the strain Dictyosporium sp. (MFLUCC 15-0629) showed seven nucleotides different from D. digitatum (yone 280) for ITS gene regions. Morphologically, D. digitatum and D. aquaticum share the character in having appendages borne at the terminal cells of each conidial arm (Chen et al. 1991, Liu et al. 2015). Dictyosporium stellatum differs from D. digitatum and D. aquaticum in lacking conidial appendages (Crous et al. 2011). In this case, it is difficult to identify our collection based on the recommendations advocated by Jeewon and Hyde (2016) for differentiating species or establishing new species. Thus, we recommend designating this collection as unknown species until enough evidence is available for its identification.