Laboulbeniomycetes (Fungi, Ascomycota) of Denmark Author Santamaria, Sergi Unitat de Botànica, Departament de Biologia Animal, de Biologia Vegetal i d’Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès (Barcelona), Spain. sergi.santamaria@uab.cat Author Pedersen, Jan Natural History Museum of Denmark (Zoological Museum), University of Copenhagen, Universitetsparken 15, 2100 København Ø, Denmark. japedersen@snm.ku.dk text European Journal of Taxonomy 2021 2021-11-26 781 1 425 http://dx.doi.org/10.5852/ejt.2021.781.1583 journal article 10.5852/ejt.2021.781.1583 2118-9773 5828924 Genus Ceratomyces Thaxt. MB#891 Proceedings of the American Academy of Arts and Sciences 27: 34 ( Thaxter 1892 ) . – Type species: C. mirabilis Thaxt. Brief description Monoecious. Primary or lower receptacle (below cells VI and VI’) consisting of 2–4(–5) superposed cells. Secondary stalk cell (VII) intercalary in the main axis of the thallus. Perithecial outer wall consisting of four vertical rows, each with many cells of similar length; two vertical rows of flattened cells alternating with two vertical rows of narrow elongated cells. Simple horns on perithecium. Remarks The genus consists of 21 species. The most recently described species is C. pyrenaeus (Santamaria 1999) , which is the only one known in Europe.