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 Hydrophilomyces digitatus F.Picard MB#195295 Fig. 7C Bulletin de la Société Mycologique de France 25: 245 ( Picard 1910 ) . – Ecteinomyces digitatus (F.Picard) Thaxt. ( Thaxter 1912a: 212 ) [not registered in MB]. Misgomyces digitatus (F.Picard) Thaxt. ( Thaxter 1931: 297 ) [MB#263206] . – Type : [Type lost!] [Ind. loc.] “Fixé, par paquets de nombreux individus, à la face inférieure de l’élytre gauche d’ Ochthebius marinus Paykull. … Très commun à Trappes (Seine-et-Oise) dans les canaux attenant à l’étang de St.-Quentin” [France] Diagnostic features Receptacle consisting of 6–14 superposed cells, curved to strongly arcuate. Perithecium rather variable, straight to arcuate, broadest near the basal quarter, abruptly tapering towards a narrow, cylindrical neck, then broadened at the level of the septa between w 2 and w 3 . [Detailed description: Santamaria 2003 ] Distribution and hosts Known on Ochthebius (Col. Hydraenidae ) from France ( type ), Sweden , Portugal and Spain ( Santamaria 2003 ). Collections examined from Denmark On Ochthebius marinus (Paykull, 1798) (Col. Hydraenidae ) DENMARK Lolland , Falster , Møn (LFM) Keldskov ; 54°39.681′ N , 11°33.593′ E ; PF66; 15 Oct. 2019 ; JP 1516 ; JP det.; ZMUC C-F-124271 . – Nordøstsjaelland (NEZ) Kalvebod Faelled ; 55°35.117′ N , 12°32.693′ E ; UB46; 24 Mar. 2020 ; JP 1638 ; JP det.; ZMUC C-F-124368 . On Ochthebius minimus (Fabricius, 1792) (Col. Hydraenidae ) DENMARK Lolland , Falster , Møn (LFM) • Røgbølle Sø ved Sørup ; 54°42.608′ N , 11°34.757′ E ; PF66; 15 Oct. 2019 ; JP 1519 ; JP det.; ZMUC C-F-124274 . Remarks First record from Denmark . The classification of Hydrophilomyces species occurring on Ochthebius is difficult. Further studies using modern molecular techniques are needed. Hydrophilomyces digitatus is best separable from other species by the absence of any remarkable character.