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 Dioicomyces Thaxt. MB#1592 Proceedings of the American Academy of Arts and Sciences 37: 33 ( Thaxter 1901b ). – Type species: D. anthici Thaxt. Brief description Dioecious. Male thalli consisting of four superposed cells, the uppermost functioning as a single antheridium. Female thalli consisting of a three-celled receptacle ( Fig. 66A ), a perithecium and a single celled primary appendage. Perithecium with 4–5(–6) cells in each vertical row of outer wall cells. Trichogyne reflexed, two-celled, the distal cell bearing terminal slender branchlets or papillae. Remarks The genus consists of 23 species, of which nine in Europe, two in Denmark . The most recently described species are D. ladoi and D. leptalei ( Santamaria 2002 ) . In this paper an extensive revision of the genus Dioicomyces , with numerous synonymies and typifications, is provided. For classification of species, male thalli are almost useless. Key to the Danish species (partially following Santamaria 2002 ) 1. Female thalli bearing outgrowths on and near the perithecial tip. On Myrmechixenus Chevrolat, 1835 (Col. Tenebrionidae ) ......................................................................... D. myrmecophilus T.Majewski – Female thalli without outgrowths. On Col. Anthicidae ........................................... D. anthici Thaxt.