MycoBank number:MB 80751; Index Fungorum number:IF 80751;Facesoffungi number: FoF 05359, 3 species.

Saprobic, isolated primarily on animal dung or soil.Coloniesflocculent, drift white, superficial, dense, and growing slowly on agar media.Hyphaeseptate, branch, hyaline to brown.Sexual morph:Ascomatasphaerical to ellipsoid, solitary, scattered, superficial on hyphae, or submerged in the agar, dark brown to black, lacking ostioles, but tending to split open before maturity.Peridiumthin, pseudoparenchymatous, composed of large brown cells oftextura angularis.Hamatheciumlacking pseudoparaphyses.Asciirregularly disposed within the ascoma, 8-spored, bitunicate, not fissitunicate, obovoid to clavate, thin-walled, pedicellate, and evanescent.Ascosporesmulti-seriate, small, often fabiform to broadly oblate, hyaline to pale brown, aseptate, smooth-walled to slightly verrucose.Asexual morph: Coelomycetous or hyphomycetous.Pycnidiaglobose to subglobose, thin-walled, papillate.Conidiophoresfiliform, septate, hyaline to brown.Conidiaellipsoidal, hyaline, aseptate, thin- walled, guttulate.

Type:EremomycesMalloch & Cain.

Notes: Malloch and Cain (1971) introducedEremomycetaceaefor species having solitary ascomata and hyaline, aseptate ascospores.Eremomycetaceaeconsists of three species:Eremomyces bilateralis,Rhexothecium globosum, andPithoascus langeronii, (=Eremomyces langeronii).Eremomycetaceaeare most similar toPseudeurotiaceae(Malloch and Sigler 1988), but differ in ascomatal initials (coiled inPseudeurotiaceae, pseudoparenchymatous inEremomycetaceae).Eremomycetaceaecomprises two generaEremomyces, the type genus andRhexothecium(Lumbsch and Huhndorf 2010).Eremomyceshas fabiform and hyaline ascospores, whileRhexotheciumhas broadly oblate and pale yellow to brown ascospores.Eremomycesis more similar toTrichosporiella(Helotiales) in having subglobose to globose, black conidiomata and scopulariopsis-like hyaline conidia.RhexotheciumresemblesTrichosporiella(Helotiales) in having solitary to catenulate, lateral, and hyaline, basic truncate conidia. Species ofEremomycetaceaeare distributed worldwide and can be commonly found in Egypt, Kenya, North America and the Netherlands. Wijayawardene et al. (2018) includedArthrographisinEremomycetaceae, while Liu et al. (2017) includedArthrographisin a new familyArthrographaceae.However, whetherArthrographaceae is valid or not is unclear as there is no mention of this family in the literature or in Index Fungorum. Members of bothArthrographisandEremomycesproduce hyaline to subhyaline conidia, howeverArthrographisis distinct in producing unicellular arthroconidia and chlamydospores which are absent inEremomyces. We includeArthrographisin Eremomycetales, generaincertae sedisuntil further studies are carried out.

Genera