Abstract
A collection of fungi was isolated from macroalgae of the genera Gracilaria, Enteromorpha and Ulva in the estuary Ria de Aveiro in Portugal. These isolates were characterized through a multilocus phylogeny based on ITS region of the ribosomal DNA, beta-tubulin (tub2) and translation elongation factor 1 alpha (tef1-α) sequences, in conjunction with morphological and physiological data. These analyses showed that the isolates represented an unknown fungus for which a new genus, Neptunomycesgen. nov. and a new species, Neptunomyces aureussp. nov. are proposed. Phylogenetic analyses supported the affiliation of this new taxon to the family Didymosphaeriaceae.
Highlights
The family Didymosphaeriaceae is an important family in the order Pleosporales introduced by Munk (1953) and typified by the genus Didymosphaeria Fuckel with D. epidermidis as the type species
No differences were observed in terms of colony diameter when grown in Potato Dextrose Agar (PDA) with and without the addition of 3% sea salts, indicating that this fungus does not require salt for growth
BLASTn searches against the NCBI nucleotide database using the internal transcribed spacer (ITS), tub2 and tef1-α sequences of the isolates retrieved various hits, of which those with the highest sequence similarity belonged to members of the family Didymosphaeriaceae
Summary
The family Didymosphaeriaceae is an important family in the order Pleosporales introduced by Munk (1953) and typified by the genus Didymosphaeria Fuckel with D. epidermidis as the type species. Members of this family are characterized by having brown 1-septate ascospores and trabeculate pseudoparaphyses that anastomose. Species of Didymosphaeriaceae are saprobes, endophytes or pathogens of a wide variety of plant species worldwide (Ariyawansa et al 2014a, Liu et al 2015, Wanasinghe et al 2016)
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