Pleosporales » Melanommataceae

Praetumpfia

Praetumpfia Jaklitsch & Voglmayr, Sydowia 69: 91 (2017).

Index Fungorum number: IF 819139; Facesoffungi number: FoF 08299, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on host. Sexual morph: Ascomata scattered or aggregated, erumpent-superficial on wood, sometimes on a black stromatic crust, globose to pyriform, black. Ascomatal apex papillate; ostioles periphysate, sometimes with yellow contents.  Peridium pseudoparenchymatous, two-layered. Hamathecium consisting of narrow pseudoparaphyses immersed in a matrix. Asci cylindrical to subclavate, bitunicate, fissitunicate, with a short stipe and a knob-like base, narrow walls with endotunica thickened at the apex and a small ocular chamber; containing 8 ascospores. Ascospores ellipsoid with upper part often slightly wider, straight, muriform, constricted at the median primary septum, brown, smooth or finely punctate. Asexual morph: coelomycetous. Pycnidia often co-occurring with ascomata, aggregated to scattered, subglobose to collapsing discoid, black, smooth. Peridium dark brown, pseudoparenchymatous. Conidiophores branched into several short simple branches, sometimes once rebranching, bearing lateral pegs or solitary phialides and a single terminal phialide. Phialides lageniform to cylindrical. Conidia oblong to cylindrical, 1-celled, hyaline, straight or curved (adapted from Jaklitsch & Voglmayr 2017).

 Type species: Praetumpfia obducens (Schumach.) Jaklitsch & Voglmayr

Notes Praetumpfia is characterised by scattered or aggregated, erumpent-superficial ascomata, cylindrical to subclavate, bitunicate, fissitunicate asci and ellipsoid, muriform ascospores. Praetumpfia obducens was previously known as Sphaeria incrustans by Fries (1823). Fuckel (1870) redescribed the fungus as Teichospora obducens. Petrak (1927) transferred S. obducens to Cucurbitaria. This treatment was not followed by Mirza (1968) and Munk (1957). Arx and Müller (1975) wrongly typified Teichospora with T. obducens. Barr (1990b) accepted the placement of T. obducens in Cucurbitaria. Praetumpfia is morphologically and phylogenetically a distinct genus in Melanommataceae. Molecular markers available for Praetumpfia are ITS, SSU, RPB2 and TEF-1.

 

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