Seifertia Partr. & Morgan-Jones, Mycotaxon 83: 348 (2002).
Index Fungorum number: IF 28681; Facesoffungi number: FoF 08302, 3 morphological species (Species Fungorum 2022), 3 species with molecular data.
Pathogenic on host. Sexual morph: Unknown. Asexual morph: Colonies effuse, powdery, grey to dark brown. Mycelium immersed composed of branched, septate, smooth, brown hyphae. Conidiophores micronematous, synnematous, straight or slightly flexuous, cylindrical, septate, smooth, olivaceous-brown to brown. Synnemata erect, simple or very rarely branched, greenish when young, becoming dark brown to black at maturity, capitate at the apex. Conidiogenous cells mono- or polyblastic, integrated, terminal, determinate, cylindrical or doliiform. Conidia acropleurogenous, holoblastic in simple or branched acropetal chains, dry, unicellular or very rarely one-septate, smooth, oblong or ellipsoid or subglobose, pale brown or olivaceous-brown (adapted from Partidge and Morgan-Jones 2002).
Type species: Seifertia azaleae (Peck) Partr. & Morgan-Jones
Notes: Seifertia was previously confused with similar genera such as Periconia (Peck 1873), Pycnostysanus (Mason 1941) and Sorocybe (Ellis 1976, Carmichael et al. 1980). Seifertia is unique in having narrow, interconidial isthmi and distinctive small spicules on the conidiogenous cells. Seifertia was referred to Melanommataceae by Seifert et al. (2007). Tian et al. (2015) excluded Seifertia from Melanommataceae based on multigene phylogenetic analyses. Li et al. (2016c) transferred S. azaleae to Melanommataceae based on a new species S. shangrilaensis found on living rachides of Rhododendron decorum in South-west China. Currently, Seifertia is accommodated in Melanommataceae. Molecular markers available for Seifertia are ITS, LSU, SSU, RPB2 and TEF-1.
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