Teratomyces actobii Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 79-81

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 .

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).

Figures

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).