Barria
Barria Z.Q. Yuan, Mycotaxon 51: 313 (1994).
Index Fungorum number: IF 27262; Facesoffungi number: FoF 00031, 1 morphological species (Species Fungorum 2022), no molecular data available.
Parasitic on Picea schrenkiana. Sexual morph: Ascomata solitary, sometimes gregarious, immersed, visible as black spots on host surface, uniloculate, globose, brown to dark brown, with centrally opening ostiole. Ostiole apex with or without papilla, ostiolar canal filled with periphyses. Peridium composed of two cell types, outer layers comprising 3–5 layers, flattened, thin-walled, dark brown to black, pseudoparenchymatous cells of textura angularis or textura prismatica, inner layers composed of 2–3 layers thin-walled cell of textura angularis which are hyaline. Hamathecium composed of numerous, broadly cellular pseudoparaphyses, filiform, branching, anastomosing, hyaline with distinct septate, slightly constricted at the septum, embedded in mucilaginous matrix. Asci 8-spored, bitunicate, fissitunicate, clavate to cylindric-clavate, shortly acute pedicel or sub sessile, apically rounded with well-developed ocular chamber, arising from basal ascoma. Ascospores overlapping, 1–2-seriate, didymospores, ellipsoidal to broadly fusiform, initially hyaline, becoming brown to dark brown at maturity, uniseptate, constrict at the septum, smooth to rough- walled with small guttules, consist of two layers, endospore is thin-walled, with thick-walled at epispore, mostly upper cell larger than lower cell, surrounded by distinct mucilaginous sheath. Asexual morph: Unknown (adapted from Ariyawansa et al. 2014).
Type species: Barria piceae Z.Q. Yuan
Notes: Barria is unique in having raised ascostromata on the surface of leaves including four to six locules with densely packed asci and unicellular hyaline to light brown ascospores. Molecular data is lacking and Auerswaldiella is currently in Botryosphaeriales genera incertae sedis. Barria resembles Didymopleella in the ascomatal structure, and asci and ascospores features but differs from Didymopleella in having textura prismatica and unequal sized cells in the ascospores (Munk 1957, Yuan 1994). Barria also resembles Didymosphaeria in having immersed to slightly erumpent ascomata under a clypeus, hyaline pseudoparaphyses, anastomosing often above the asci, surrounded in mucilage and 1-spetate, ellipsoid ascospores and differs in having brown to dark brown ascomata containing numerous layers of textura angularis to textura prismatica cells in peridium, cellular pseudoparaphyses and asci having well developed ocular chamber bearing ellipsoidal to broadly fusiform, at first hyaline, becoming brown to dark brown at maturity,uniseptate ascospores with distinct mucilaginous sheath. Barria was tentatively placed in Phaeosphaeriaceae based on the ascomata and ascospores characters (Yuan 1994, Zhang et al. 2012). The taxonomic placement of Barria is uncertain and is currently placed in Didymosphaeriaceae.
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