Phaulomyces octotemni (T.Majewski) I.I.Tav.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 67

Phaulomyces octotemni (T.Majewski) I.I.Tav.

MB#105670

Fig. 11D–E

Mycologia Memoirs 9: 273 ( Tavares 1985). – Basionym: Euphoriomyces octotemni T.Majewski, Acta Mycologica 9(2): 232 ( Majewski 1973c) [MB#313989]. –

Type: “ On Octotemnus glabriculus Gyll. (Col., Cisidae ): Berezki, Ustrzyki Dolne county (Bieszczady Mts.), in small polypores on lying trunks of trees in a beech wood on the right bank of Wolosaty stream (650 m), 12.9.1972 leg. T. Majewski ( TM. … 1040 – holotype)”; KRAM. [Host family is a Ciidae , not Cisidae ]

Diagnostic features

Third cell of the receptacle ± isodiametric, sometimes slightly flattened. One, more rarely two, perithecia for each thallus; bent towards the appendage.Appendage very elongate if undamaged, up to 250 µm long, 3–4 times as long as thalli. [Detailed description: Majewski 1994b]

Distribution and hosts

Only known on the species type host from Poland (type) and Spain ( Santamaria 1995b).

Collections examined from Denmark

On Octotemnus glabriculus (Gyllenhal, 1827) (Col. Ciidae )

DENMARK – Østjylland (EJ) • Almose i Fjeld Skov ; 56°24.698′ N, 10°27.948′ E; NH95; 23 Nov. 2019; JP 1569; JP det.; ZMUC C-F-124329 , C-F-124330 . – Lolland, Falster, Møn (LFM) • Keldskov ; 54°39.977′ N, 11°33.286′ E; PF66; 15 Oct. 2019; JP 1515; JP det.; ZMUC C-F-124270 . – Nordøstsjaelland (NEZ) • Hørsholm Arboret ; 55°52.017′ N, 12°30.373′ E; UB49; 13 Nov. 2019; JP 1544; JP det.; ZMUC C-F-124304 , C-F-124305 .

Remarks

First record from Denmark. Although the host is common and widespread in Denmark, the fungus seems to be quite rare. Exactly as occurs with P. euaestheti there are problems with understanding where the primary septum is located. The successive formation of first and second perithecia if any, is driven likewise in both species. According to literature, antheridia are unknown in P. octotemni . Nevertheless at least in one of the studied immature thalli we suspect the presence of one flask-shaped antheridium on the first cell of the appendage ( Fig. 11E , an), similarly to described for P. euaestheti .

Figures

Fig. 11. A–B. Euphoriomyces unilateralis T.Majewski.A. Paired thalli. B. Thallus with two perithecia, the lower immature, the upper overmature. – C. Phaulomyces euaestheti (Thaxt.) I.I.Tav., mature thallus with two perithecia and with the probable cell III labelled (III?). – D–E. Phaulomyces octotemni (T.Majewski) I.I.Tav. D. Paired thalli. E. Five thalli with a labelled antheridium (an) on the right immature thallus. Scale bars: A–B = 20 µm; C–E = 50 µm. Photographs from slides ZMUC C-F-123798 (A–B), ZMUC C-F-122484 (C), ZMUC C-F-124330 (D), ZMUC C-F-124329 (E).