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 Hesperomyces virescens Thaxt. MB#140369 Fig. 53C–D Proceedings of the American Academy of Arts and Sciences 25: 264 ( Thaxter 1891 ) . – Stigmatomyces virescens Thaxt. ( Thaxter 1894: 106 ) [MB#181575]. – Type : “ On Chilocorus bivulnerus , California ”; FH . [ USA ] Hesperomyces hyperaspidis Thaxt. ( Thaxter 1931: 111 ) [MB#267531] Diagnostic features Thallus bright yellow. Primary appendage consisting of (3–)4 superposed cells, where the 3 rd and 4 th bear one and two antheridia respectively. Perithecial tip with two very short and narrow lower lobes, two elongated upper lobes and two prominent lips surrounding the ostiole. [Detailed descriptions: Weir & Beakes 1996 ; Santamaria 2003 ; De Kesel 2011] Fig. 53. Hesperomyces spp. A –B . H. coccinelloides (Thaxt.) Thaxt. Mature thalli showing labelled cells I, II, III, primary septum (a), and a spinous process from the original spore apex (sx). – C–D . H. virescens Thaxt. Mature thalli. In D, “sx” corresponds to the spiny original spore apex. Scale bars: 50 µm. Photographs from slides ZMUC C-F-123662 (A–B), ZMUC C-F-124113 (C), ZMUC C-F-124109 (D). Distribution and hosts A very common and widespread species. Reported on no less than 30 species and 20 genera of ladybird species (Col. Coccinellidae ) from the five continents ( Haelewaters et al. 2017 ). Also reported from Denmark (see Table 1 ). Collections examined from Denmark On Adalia bipunctata (Linnaeus, 1758) (Col. Coccinellidae ) DENMARK – Nordøstsjaelland (NEZ) • Blågårds Plads , Nørrebro ; 55°41.183′ N , 12°33.424′ E ; UB47; 8 Nov. 2007 ; T. Steenberg Dry0047 ; T. Steenberg det.; ZMUC C-F-124113 • Grøndalsparken , Vanløse ; 55°41.351′ N , 12°30.518′ E ; UB47; May 2011 ; T. Steenberg Dry0043 ; T. Steenberg det.; ZMUC C-F-124109 • Grønningen , København K. ; 55°41.385′ N , 12°35.435′ E ; UB47; 15 Jan. 2008 ; T. Steenberg Dry0044 ; T. Steenberg det.; ZMUC C-F-124110 • Kongens Have , København K. ; 55°41.107′ N , 12°34.766′ E ; UB47; 10 Nov. 2007 ; T. Steenberg Dry0045 ; T. Steenberg det.; ZMUC C-F-124111 • Thorvaldsensvej , Frederiksberg ; 55°40.857′ N , 12°32.540′ E ; UB47; 26 May 2009 ; T. Steenberg DrY0046 ; T. Steenberg det.; ZMUC C-F-124112 . Remarks All the Danish records of this species come from specimens kept in dry museum collections. Perhaps a collective species including at least other seven undescribed taxa which have been revealed by sequencing thalli from multiple host species ( Haelewaters et al. 2018a ; Haelewaters & De Kesel 2020 ). According to Haelewaters & De Kesel (2020) , the Danish samples collected on Adalia Mulsant, 1850 fall into the named Adalia -clade and should belong to some yet undescribed species separate from H. virescens , a species what is suggested by Haelewaters et al. (2018a) to be restricted to fungi found on Chilocorus Leach, 1815 , as originally described.