Dothideomycetes » Dothideomycetes, genera incertae sedis

Scolecoxyphium

Scolecoxyphium Cif. & Bat., Publicações Inst. Micol. Recife 47: 5 (1956).

 Index Fungorum number: IF 9846; Facesoffungi number: FoF 12471, 8 morphological species (Species Fungorum 2022), 2 species with molecular data.

Mycelium superficial or immersed, hyaline to brown, branched, hyphae smooth, thin-walled, septate, constricted at septa, with a mucilaginous outer wall layer. Sexual morph: Unknown. Asexual morph: Pycnidia irregularly cylindrical, straight or flexuous, short or long, sessile, with no swollen part to indicate the location of the pycnidial cavity; wall is composed of linearly arranged, fused hyphae. Ostiole present, without hyaline hyphal extensions, around the ostiole the hyphae are brown and obtusely rounded. Conidia ellipsoidal, hyaline and continuous (adapted from Hughes 1976).

 Type species: Scolecoxyphium fraserae Cif. & Bat.

Notes: Scolecoxyphium is characterised by superficial or immersed, hyaline to brown mycelium, cylindrical, straight or flexuous pycnidia, and ellipsoidal, hyaline and continuous conidia. Batista and Ciferri (1963) added three other species to Scolecoxyphium. Molecular data is lacking. Kirk et al. (2013) and Wijayawardene et al. (2017, 2020) listed Scolecoxyphium in Dothideomycetes genera incertae sedis. Recently, Abdollahzadeh et al. (2020) added S. blechni, S. leucadendri, S. phylicae and S. blechnicola and provided sequence data for Scolecoxyphium. Fresh collections with DNA sequence data are needed to confirm the systematic position of Scolecoxyphium. Molecular markers available for Scolecoxyphium are ITS, LSU, RPB2 and TEF-1.

 

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