Amphisphaeriales » Melogrammataceae

Melogramma

Melogramma Fr., Summa veg. Scand., Sectio Post. (Stockholm): 386 (1849)

Xylariomycetidae, Amphisphaeriales, Melogrammataceae, Melogramma

Index Fungorum number: IF3117; 17 morphological species (Species Fungorum 2020), 3 species with sequence data.

 

Saprobic on bark of woody plants. Sexual morph: Stromata superficial, erumpent, pulvinate or discoid, reddish-brown, subglobose, soft-textured, with pseudoparenchymatous cells and black ostiole. Ascomata perithecial, dark brown to black, immersed, globose, ostiole periphysate. Peridium comprising rows of cells, externally brown, internally hyaline. Paraphyses hypha-like, septate. Asci 8-spored, unitunicate, clavate or fusoid, short-pedicellate, with a shallow, J-, apical ring. Ascospores 1-3-seriate, hyaline or brown, filiform, aseptate or 1–3-septate, cylindrical or falcate. Asexual morph: Coelomycetous. Mycelium hyaline to yellow-brown, septate, branched. Conidiophores long, cylindrical, stiffly upright, septate, verticillate and whorled or not. Conidiogenous cells holoblastic, proliferating sympodially, hyaline, thin-walled. Conidia elongate falcate or filiform (adapted from Maharachchikumbura et al. 2016b).

 

Type species: Melogramma campylosporum Fr., Summa veg. Scand., Sectio Post. (Stockholm): 386 (1849)

 

Notes: Melogramma is characterized by reddish-brown stroma, dark brown to black, globose, ostiolate and perithecial ascoma, unitunicate, straight, clavate, fusoid or sigmoid, short pedicellate, 8-spored asci with a J-, apical ring and brown, 3-septate, falcate, often strongly curved ascospores with subacute ends and guttulate when mature (Maharachchikumbura et al. 2016b).

 

 

Species illustrated in this entry:

Melogramma campylosporum Fr.

 

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