Siemaszkoa ptenidii (Scheloske) I.I.Tav. & T.Majewski

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 71-72

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 Skov på Tuse 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 ).

Figures

Fig. 13. Siemaszkoa spp. A–C. S. ptenidii (Scheloske) I.I.Tav. & T.Majewski. Mature thalli showing protruding lip in A (*), and a trichogyne stump in B (arrow). Thallus in B has developed two mature perithecia. – D–G. S. ramificans T.Majewski.D. Mature thallus showing cells of the base of the appendage typically inflated (*). E–F. Immature thalli showing antheridia (arrows). G. Mature thallus. Scale bars: A, D = 20 µm; B–C, E–G = 50 µm. Photographs from slides ZMUC C-F-123285 (A), ZMUC C-F-123972 (B), ZMUC C-F-123227 (C), ZMUC C-F-122719 (D), ZMUC C-F-122797 (E–F), ZMUC C-F-124322 (G).