Arenariomyces truncatellus sp. nov., an ascomycete on driftwood from the north coast of Zealand, Denmark

Incubated driftwood from the north coast of Zealand, Denmark, yielded a new species, Arenariomyces truncatellus, belonging to the Halosphaeriaceae, Ascomycota. The species is characterized by globose, spiny ascomata formed on wood with asci deliquescing before spore maturity and 1-septate ascospores with three delicate appendages at each spore end. The species is compared with A. majusculus, A. parvulus, A. trifurcatus, and A. triseptatus. A key to the species is provided.