Dothideomycetes families incertae sedis » Phaeodimeriellaceae

Phaeodimeriella

Phaeodimeriella Speg., Revta Mus. La Plata 15(2): 13 (1908).

 Index Fungorum number: IF 3908; Facesoffungi number: FoF 01927, 27 morphological species (Species Fungorum 2022), no molecular data available.

Saprobic on twigs forming spots. Sexual morph: Ascostromata superficial, scattered, solitary or gregarious, carbonaceous, semi-immersed to erumpent, black, globose to oval, multi-loculate, locules arrange in two layers in the outer layer of the ascostromata, one ascus in each locule, ostiolate. Ostioles minute. Paraphyses absent. Cells of the ascostromata comprised thick-walled of textura angularis. Asci 8-spored, bitunicate, fissitunicate, globose, apedicellate, apically rounded with indistinct ocular chamber. Ascospores hyaline, oblong to oval, 1–4-transverse septa, longitudinal septa absent, constricted at the septa, smooth-walled, lacking a sheath. Asexual morph: Unknown (adapted from Boonmee et al. 2017).

Type species: Phaeodimeriella parvula (Cooke) Hansf.

Notes: Phaeodimeriella was lectotypified with P. occulta by Theissen (1912). Phaeodimeriella occulta was synonymized under P. parvula based on Cooke’s description of Dimerosporium parvulum by Hansford (1946). Phaeodimeriella has an epiphytic lifestyle and is characterised by superficial ascomata, hook-like setae anduniseptate, sometimes guttulate, rough-walled ascospores. Phaeodimeriella is a distinct genus accommodated in its own family Phaeodimeriellaceae. Fresh specimens with DNA sequence data are needed to confirm the systematic placement of Phaeodimeriella.

 

 

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