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 flexa (T.Majewski) I.I.Tav. & T.Majewski MB#323554 Fig. 12F–I Mycotaxon 3: 204 ( Tavares & Majewski 1976 ). Basionym : MisgomYces flexus T.Majewski, Acta Mycologica 9(1): 119 ( Majewski 1973a ) [MB#317765] . Type : “ On Ptenidium fuscicorne Er. (Ptiliidae): Kielpin, Nowy Dwór Mazowiecki county, in litter at foot of alder next to small pond, 22.12.1971 leg. T. Majewski ( TM 899holotype )”; KRAM . [ Poland ] Diagnostic features Receptacle consisting of 8–9 superposed cells (cell I included); strongly curved in mature thalli.Appendage unbranched, long, strongly bent outward in relation to the receptacle axis, bearing broad, conical, short, 1–3 antheridia in some lower cells ( Fig. 12I , arrows). Perithecium appears to be terminal on the receptacle axis. Perithecial apex obtuse, slightly asymmetric. [Detailed descriptions: Majewski 1991 , 1994b ] Distribution and hosts Only known from the Polish type on species of Ptenidium (Col. Ptiliidae ). Collections examined from Denmark On Ptenidium fuscicorne Erichson, 1845 (Col. Ptiliidae ) F DENMARK yn (F) 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-123632 . – Nordøstjylland (NEJ) Vandplasken ved Kaersgård Strand ; 57°31.199′ N , 9°53.070′ E ; NJ57; 21 Nov. 2017 ; JP 805 ; JP det.; ZMUC C-F-123300 . – 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; 12 Apr. 2016 ; JP 21 ; JP det.; ZMUC C-F-122494 ibid.; 19 Mar. 2017 ; JP 682 ; JP det.; ZMUC C-F-123170 Stampeskov ved Rådvad ; 55°48.332′ N , 12°33.138′ E ; UB48; 14 Apr. 2013 ; JP 790 ; JP det.; ZMUC C-F-123285 . – 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) . 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 and the first after it was originally described. This species has rarely been found as mature in Denmark , but the immature thalli showing broad, lateral antheridia on appendage, may be easily classified. The foot consists of a lateral darker spot surrounded by a paler area ( Fig. 12H ).