Baggea
Baggea Auersw., Hedwigia 5: 1 (1866).
Index Fungorum number: IF 491; Facesoffungi number: FoF 00345, 1 morphological species (Species Fungorum 2022), no molecular data available.
Saprobic on dead branches of Quercus sp. in terrestrial habitats. Sexual morph: Ascomata apothecial or hypothecia-like, superficial, fusiform to ellipsoidal, narrow at the base, circular, triangular or irregular in shape when wet, black, coriaceous, opening by a longitudinal slit or radial rupture, exposing blackish discs, with margin slightly raised above flat and black slit, which widens on wetting. Exciple pseudoparenchymatous, composed of an outer wall of black to dark brown cells and inner wall of paler brown cells arranged in a textura globulosa. Hamathecium comprising relatively wide, septate, branched, pseudoparaphyses, especially in upper part, occasionally anastomosed in the lower part, hyaline, with tips slightly swollen and agglutinated, forming a light brown surface layer (epithecium). Asci polysporous, bitunicate, broadly clavate or clavate, with apical dome and short pedicel, wall 1– 2 µm (n = 10) thick, ocular chamber not obvious in mature specimens, J-. Ascospores numerous, allantoid, with rounded ends, usually with 3-transverse septa, occasionally up to 6 septa, curved, thin-walled, brown, smooth-walled. Asexual morph: Unknown (adapted from Yacharoen et al. 2015).
Type species: Baggea pachyascus Auersw.
Notes: Baggea is characterised by polysporous, bitunicate, broadly clavate or clavate asci, allantoid ascospores with rounded ends, usually with 3-transverse septa, seldom up to 6 septa. Auerswald (1866) treated Baggea as a distinct genus in Hysteriaceae and this treatment was followed by subsequent authors (Saccardo 1883, Rehm 1912). Nannfeldt (1932) and Zogg (1962) revised the genus and placed Baggea in Lecanorales based on the characters of the ascomata and pseudoparaphyses. Rehm (1896), Clements and Shear (1931) and Arx and Müller (1975) assigned Baggea to Patellariaceae. Baggea differs from members of Patellariaceae in having polysporous asci and allantoid ascospores. Yacharoen et al. (2015) accepted Baggea as a genus in Patellariaceae based on a specimen collected by H. Rehm on dead branch of Quercus sp. (Fagaceae) in Germany. Molecular data is lacking for Baggea hence fresh collections and DNA sequence data are needed to confirm the taxonomic placement of the genus.
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