Siemaszkoa flexa (T.Majewski) I.I.Tav. & T.Majewski

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 70-71

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 899 – holotype)”; 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 ).

Figures

Fig. 12. Siemaszkoa spp. A–E. S. fennica Huldén. A–B. Mature thalli. C. Unusual thallus with two perithecia. D. Detail of a mature thallus showing antheridia (arrows). E. Short thallus from legs. – F–I. S. flexa (T.Majewski) I.I.Tav. & T.Majewski. F–G. Mature thalli. H. Detail of foot. I. Detail of an immature thallus showing antheridia (arrows). Scale bars: A–C, E–G = 50 µm; D, H–I = 20 µm. Photographs from slides ZMUC C-F-122949 (A), ZMUC C-F-123248 (B), ZMUC C-F-123466 (C), ZMUC C-F-123309 (D), ZMUC C-F-123582 (E), ZMUC C-F-123632 (F–G), ZMUC C-F-123583 (H–I).