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 Siemaszkoa ptenidii (Scheloske) I.I.Tav. & T.Majewski MB#323555 Fig. 13A–C Mycotaxon 3: 204 ( Tavares & Majewski 1976 ) . – Basionym : Misgomyces ptenidii Scheloske, Parasitologische Schriftenreihe 19: 135 ( Scheloske 1969 ) [MB#334359]. – Type : “ In einzelnen Exemplaren auf Halsschild und Elytren von Ptenidium sp. ( Pt. fuscicorne ?) (Col. Ptiliidae ). – Die Funde stammen aus dem Gesiebe (Bodenstreu) aus Erlenbruchwäldern bei Schwand/Nürnberg und aus Genist an Weihern bei Dechsendorf/Erlangen. Deutschland. Holotypus Abb. 36”. [ Germany ] Diagnostic features Receptacle consisting of 5–9 superposed cells (cell I included). Appendage unbranched, seeming like a prolongation of the receptacle axis. Antheridia unknown. Perithecium narrow and elongate, lateral to the thallial axis. Perithecial apex asymmetric, showing a protruding lip ( Fig. 13A , *). [Detailed descriptions: Majewski 1991 , 1994b ] Distribution and hosts Only known from Germany ( type ), Poland ( Majewski 1973c ), and Belgium ( De Kesel et al. 2020 ). Occurs on Ptenidium (Col. Ptiliidae ). Collections examined from Denmark On Ptenidium fuscicorne Erichson, 1845 (Col. Ptiliidae ) DENMARK Fyn (F) Gyldenstens inddaemmede Strand ; 55°34.447′ N , 10°7.211′ E ; NG75; 2 Apr. 2014 ; JP 684 ; JP det.; ZMUC C-F-123172 Rishave ; 55°33.475′ N , 10°24.013′ E ; NG85; 19 Apr. 2018 ; JP 1066 ; JP det.; ZMUC C-F-123583 . – Lolland, Falster, Møn (LFM) Ulvshale ; 55°2.636′ N , 12°15.638′ E ; UB20; 26 May 2018 ; JP 1113 ; JP det.; ZMUC C-F-123633 Vest for Bandholm ; 54°50.303′ N , 11°28.050′ E ; PF57; 3 Jan. 2019 ; JP 1341 ; JP det.; ZMUC C-F-123880 . – Nordøstjylland (NEJ) Syd for Krogsagergård ; 56°37.534′ N , 9°45.551′ E ; NH47; 24 Nov. 2019 ; JP 1551 ; JP det.; ZMUC C-F-124312 . – Nordøstsjaelland (NEZ) Eriksholm Skov ; 55°41.771′ N , 11°47.912′ E ; PG77; 4 Nov. 2017 ; JP 734 ; JP det.; ZMUC C-F-123227 Indelukket ved Frederiksborg Slot ; 55°56.191′ N , 12°17.861′ E ; UC30; 19 Mar. 2017 ; JP 682 ; JP det.; ZMUC C-F-123170 Lyngen ved Ølstykke ; 55°47.738′ N , 12°10.253′ E ; UB28; 15 May 2013 ; JP 870 ; JP det.; ZMUC C-F-123366 Mølleå ved Farum Lillevang ; 55°49.093′ N , 12°18.496′ E ; UB38; 24 Feb. 2018 ; JP 993 ; JP det.; ZMUC C-F-123500 Stampeskov ved Rådvad ; 55°48.332′ N , 12°33.138′ E ; UB48; 14 Apr. 2013 ; JP 790 ; JP det.; ZMUC C-F-123285 . – Nordvestjylland (NWJ) Vest for Vinderup ; 56°28.727′ N , 8°44.810′ E ; MH85; 19 Jan. 2015 ; JP 768 ; JP det.; ZMUC C-F-123262 . – Nordvestsjaelland (NWZ) Bognaes SkovTuse Naes ; 55°44.966′ N , 11°45.817′ E ; PG78; 10 Dec. 2013 ; JP 887 ; JP det.; ZMUC C-F-123385 . – Sydsjaelland (SZ) Denderup Sø i Denderup Vaenge ; 55°15.075′ N , 11°57.366′ E ; PG82; 9 Apr. 2019 ; JP 1426 ; JP det.; ZMUC C-F-123972 (2 slides) Gammel Kalvehave ; 54°59.745′ N , 12°8.232′ E ; UA19; 25 Apr. 2019 ; JP 1453 ; JP det.; ZMUC C-F-124003 . – Vestjylland (WJ) Velling ; 56°3.078′ N , 8°18.596′ E ; MH51; 16 Dec. 2018 ; JP 1269 ; JP det.; ZMUC C-F-123797 . On Ptenidium intermedium Wankowiez, 1869 (Col. Ptiliidae ) DENMARK Sydsjaelland (SZ) Praestø ; 55°6.913′ N , 12°2.035′ E ; UB11; 25 Apr. 2019 ; JP 1431 ; JP det.; ZMUC C-F-123978 . On Ptenidium pusillum (Gyllenhal, 1808) (Col. Ptiliidae ) DENMARK Lolland, Falster, Møn (LFM) Nyord ; 55°2.885′ N , 12°12.380′ E ; UB20; 27 Apr. 2013 ; JP 840 ; JP det.; ZMUC C-F-123335 . Remarks First record from Denmark . Sometimes coexists with S. flexa on the same host specimen. Although many immature thalli have been studied, we have not detected the presence of antheridia. A well-distinguished trichogyne stump may be seen on the outer side of the perithecium ( Fig. 13B , arrow), which suggests the existence of antheridia. Rarely, some thalli bear a second mature perithecium ( Fig. 13B ). Thalli from host underside show inflated receptacular cells with constricted septa ( Fig. 13B ).