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Marine fungi remain poorly covered in global genome sequencing campaigns; the 1000 fungal genomes (1KFG) project attempts to shed light on the diversity, ecology and potential industrial use of overlooked and poorly resolved fungal taxa. This study characterizes the genomes of three marine fungi:  Emericellopsis  sp. TS7, wood-associated  Amylocarpus encephaloides  and algae-associated  Calycina marina.  These species were genome sequenced to study their genomic features, biosynthetic potential and phylogenetic placement using multilocus data.  Amylocarpus encephaloides  and  C. marina  were placed in the  Helotiaceae  and  Pezizellaceae (Helotiales) , respectively, based on a 15-gene phylogenetic analysis. These two genomes had fewer biosynthetic gene clusters (BGCs) and carbohydrate active enzymes (CAZymes) than  Emericellopsis  sp. TS7 isolate.  Emericellopsis  sp. TS7 ( Hypocreales ,  Ascomycota ) was isolated from the sponge  Stelletta normani . A six-gene phylogenetic analysis placed the isolate in the marine  Emericellopsis  clade and morphological examination confirmed that the isolate represents a new species, which is described here as  E. atlantica . Analysis of its CAZyme repertoire and a culturing experiment on three marine and one terrestrial substrates indicated that  E. atlantica  is a psychrotrophic generalist fungus that is able to degrade several types of marine biomass. FungiSMASH analysis revealed the presence of 35 BGCs including, eight non-ribosomal peptide synthases (NRPSs), six NRPS-like, six polyketide synthases, nine terpenes and six hybrid, mixed or other clusters. Of these BGCs, only five were homologous with characterized BGCs. The presence of unknown BGCs sets and large CAZyme repertoire set stage for further investigations of  E. atlantica . The  Pezizellaceae  genome and the genome of the monotypic  Amylocarpus  genus represent the first published genomes of filamentous fungi that are restricted in their occurrence to the marine habitat and form thus a valuable resource for the community that can be used in studying ecological adaptions of fungi using comparative genomics.   Supplementary Information  The online version contains supplementary material available at 10.1186/s43008-021-00072-0.

ima fungus

Genomic characterization of three marine fungi, including Emericellopsis atlantica sp. nov. with signatures of a generalist lifestyle and marine biomass degradation