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 Teratomyces actobii Thaxt. MB#140205 Fig. 15A–B Proceedings of the American Academy of Arts and Sciences 29: 98 ( Thaxter 1894 ) . – Type : “ USA , Maine , Kittery Point , 18 August 1893 , [ R. Thaxter ], on Erichsonius nanus (Horn, 1884) [as Actobius ], slide FH 00313507 ”; FH . [ lectotype designated by Haelewaters et al. 2015b: 471 ] Teratomyces brevicaulis Thaxt. ( Thaxter 1894: 99 ) [MB#140281] Teratomyces atropurpureus Maire (1920: 145) [MB#140504] Diagnostic features Cells I, IIa, IIb and III variably pigmented, sometimes blackened or entirely pale. Pointed branchlets on secondary appendages variably curved. Perithecium uniformly tinged with brown, smooth in outline, without elevations on septa separating the wall cell tiers. [Detailed descriptions: Thaxter 1896 ; Santamaria 1989 ; Majewski 1994b ] Distribution and hosts Occurs on Erichsonius and allied genera like Parerichsonius Coiffait, 1961 and Neobisnius Ganglbauer, 1895 (Col. Staphylinidae Staphylininae ). Teratomyces actobii is found in Europe ( Spain , United Kingdom , France , Italy , Germany , Poland , Finland , Russia ), Africa ( Algeria ), Asia ( Sri Lanka ), and America ( USA ) ( Majewski 2008 ). Reported later from Sweden ( Huggert 2010 ), Bulgaria ( Rossi et al. 2019a ), and Hungary ( Rossi & Christian 2020 ). The record of T. brevicaulis on Acylophorus Nordmann, 1837 from France by Duverger (1995) might be referred to TeratomYces mirificus according to the identity of the host. Records of T. actobii reported and illustrated on Gabrius from Belgium by De Kesel et al. (2020 : pl. 81) belong to T. philonthi , but those reported and illustrated as T. philonthi on the same host genus ( De Kesel et al. 2020 : pl. 82) might belong to T. actobii . Fig. 15. Teratomyces spp. A –B . T. actobii Thaxt. Immature and mature thalli showing variability in receptacle pigmentation. – C . T. philonthi Thaxt. Mature thallus with labelled wall cell tiers (w 1–4), pointed and arcuate secondary appendages (arrows), and cells IIa–b of receptacle. Scale bars: 50 µm. Photographs from slides ZMUC C-F-122481 (A), ZMUC C-F-123544 (B), ZMUC C-F-122832 (C). Collections examined from Denmark On Erichsonius cinerascens (Gravenhorst, 1802) ( Col. Staphylinidae Staphylininae ) DENMARK – Lolland, Falster, Møn (LFM) • Jydelejet , Møns Klint ; 54°58.979′ N , 12°32.281′ E ; UA49; 2 May 2018 ; A.K. Hansen 1100 ; A.K. Hansen det.; ZMUC C-F-123618 . – Nordøstsjaelland (NEZ) • Fruebjerg i Strøgårdsvang ; 55°58.539′ N , 12°16.659′ E ; UC30; 18 Oct. 2018 ; JP 1218 ; JP det.; ZMUC C-F-123745 • Indelukket ved Frederiksborg Slot ; 55°56.191′ N , 12°17.861′ E ; UC30; 12 Apr. 2016 ; JP 9 ; JP det.; ZMUC C-F-122481 • Sjaelland , North ; without coordinates; ca 1870 ; Schiødte Dry0190 ; M. Uhlig det.; ZMUC C-F-124255 • Syd for Løjesø i Rude Skov ; 55°49.866′ N , 12°28.551′ E ; UB49; 12 Apr. 2018 ; JP 1032 ; JP det.; ZMUC C-F-123544 . – Nordvestsjaelland (NWZ) • Kattrup Haveskov ; 55°36.707′ N , 11°23.065′ E ; PG56; 6 Feb. 1990 ; E. Palm Dry0189 ; JP det.; ZMUC C-F-124254 . – Sydsjaelland (SZ) • Sorø Sø ; 55°26.315′ N , 11°32.726′ E ; PG64; 12 May 1896 ; F. de Tengnagel Dry0188 ; F. de Tengnagel det.; ZMUC C-F-124253 . Remarks First record from Denmark . The darkening of cells IIa and IIb is variable and may be totally absent; therefore, this feature cannot be used to separate species such as T. brevicaulis , which was synonymized with T. actobii according to molecular sequencing ( Haelewaters et al. 2015b ).