Moschomyces Thaxt., Proceedings of the American Academy of Arts and Sciences 29: 97 ( Thaxter 1894 ) Laboulbeniomycetes (Fungi, Ascomycota) of Denmark Santamaria, Sergi Pedersen, Jan European Journal of Taxonomy 2021 2021-11-26 781 1 425 3SWG Thaxt. [708,962,1359,1385] Laboulbeniomycetes Laboulbeniaceae Compsomyces Fungi Laboulbeniales 40 41 Ascomycota genus  MB#1200    Proceedings of the American Academy of Arts and Sciences29: 96 ( Thaxter 1894). –   Typespecies:  C. verticillatus(Thaxt.) Thaxt.      MoschomycesThaxt., Proceedings of the American Academy of Arts and Sciences29: 97 ( Thaxter 1894)[MB#3277]    Brief description Monoecious. Cell II supporting secondary axes and appendages bearing simple sessile antheridia. Perithecia borne on the secondary axes; outer wall with 4–8 unequal cells in each vertical row. Asci with 4 or 8 ascospores.    Remarks The genus consists of five or six species depending on whether  C. macropodais regarded as a separate species or is included among the synonyms of  C. verticillatus( Santamaria 2003). No new species have been added after Thaxter (1931). Two in Europe, both in Denmark. This genus is remarkable because perithecia are borne on secondary instead of primary receptacle, and because there are species, like  C. verticillatus(Thaxt.) Thaxt.which show 8-spored asci instead of the usual 4-spored asci, a character exclusively shared within the Laboulbenialeswith the genus  Euceratomyces( Tavares 1985). It seems quite logical to think that this genus needs a revision and probably needs to be subdivided. Some characteristics accepted as essential to segregate genera, such as the number of perithecial wall cells is here very different from one species to the other. Indeed, the number of cells in each vertical row of wall cells in perithecium varies from four in  C. lestevaeto 6–8 in  C. verticillatus.    Key to the Danish species (partially following Santamaria 2003)     1. Perithecium with each vertical row of outer wall cells consisting of 6–8 subequal cells ( Fig. 5E, arrows). On  Astenus(Col. Staphylinidae) .........................................  C. verticillatus(Thaxt.) Thaxt.  – Perithecium with each vertical row of outer wall cells consisting of four unequal cells ( Fig. 5A, arrows). On  Lesteva(Col. Staphylinidae)...............................................................  C. lestevaeThaxt.