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 Rhachomyces lasiophorus (Thaxt.) Thaxt. MB#186325 Fig. 17E–F Proceedings of the American Academy of Arts and Sciences 30: 468 ( Thaxter 1895 ) . – Basionym : Acanthomyces lasiophora Thaxt., Proceedings of the American Academy of Arts and Sciences 29: 37 ( Thaxter 1892 ) [MB#431393]. – Type : “ On Atranus pubescens , Connecticut ”; FH . [ USA ] Diagnostic features Main receptacle axis not continuing into a lateral branch above the perithecium. Appendages types “a” and “b” inseparable, very abundant, deeply darkened. Perithecium broadly oval, very inflated, up to 60 µm in width, showing a ± conspicuous preapical darkened ring. [Detailed descriptions: Thaxter 1896 ; Majewski 1994b ; De Kesel 2002 ] Distribution and hosts On species of Col. Carabidae belonging to the genera Acupalpus , Agonum (?) Bonelli, 1810, Anthracus Motschulsky, 1850 , Atranus LeConte, 1848 , Badister , and Dromius Bonelli, 1810 . Known from Europe ( France , Belgium , United Kingdom , Italy , Germany and Poland ), USA and Korea ( Majewski 2008 ). Also from the Netherlands ( Haelewaters & De Kesel 2010 ), Czech Republic ( Rossi et al. 2010 ), Turkey ( Rossi 2016 ), Bulgaria ( Rossi et al. 2019a ), and Hungary ( Rossi & Christian 2020 ). Collections examined from Denmark On Acupalpus dubius Schilsky, 1888 (Col. Carabidae ) DENMARK Sydjylland (SJ) Lakolk ; 55°8.325′ N , 8°29.618′ E ; MG61; 21 May 2017 ; JP 422 ; JP det.; ZMUC C-F-122906 . On Acupalpus exiguus Dejean, 1829 (Col. Carabidae ) DENMARK Nordøstsjaelland (NEZ) Stampeskov ved Rådvad ; 55°48.332′ N , 12°33.138′ E ; UB48; 28 Feb. 2017 ; H. Liljehult 359 ; JP det.; ZMUC C-F-122841 Syd for Løjesø i Rude Skov ; 55°49.866′ N , 12°28.551′ E ; UB49; 12 Apr. 2018 ; JP 1030 ; JP det.; ZMUC C-F-123542 . – Sydsjaelland (SZ) Østerskov ved Langebaek ; 54°59.572′ N , 12°6.715′ E ; UA19; 3 Jan. 2019 ; JP 1281 ; JP det.; ZMUC C-F-123813 . On Acupalpus flavicollis (Sturm, 1825) (Col. Carabidae ) DENMARK Nordøstsjaelland (NEZ) Dyrehaven ; 55°47.347′ N , 12°33.957′ E ; UB48; 20 Apr. 2017 ; H. Liljehult 275 ; JP det.; ZMUC C-F-122754 Syd for Løjesø i Rude Skov ; 55°49.866′ N , 12°28.551′ E ; UB49; 12 Apr. 2018 ; JP 1028 ; JP det.; ZMUC C-F-123540 . On Anthracus consputus (Duftschmid, 1812) (Col. Carabidae ) DENMARK Bornholm (B) Skelsmyre i Rønne Plantage ; 55°4.375′ N , 14 45.096′ E ; VB80; 25 Apr. 2014 ; JP 509 ; JP det.; ZMUC C-F-122992 . – Lolland, Falster, Møn (LFM) Gedesby ; 54°35.290′ N , 11°58.199′ E ; 6–14 Jun. 2013 ; E. Vesterhede 188 ; JP det.; ZMUC C-F-122667 . Remarks First record from Denmark . Balazuc (1971a) described R. lasiophorus subsp. demauxii on Acupalpus exiguus from France , differing from typical forms by the reduced thalli, with few cells on the receptacle. We have found this form on tarsi of several studied hosts ( Fig. 17F ) and it may be considered a growth form of the nominal subspecies.