Fungalpedia – Note 1628, Quaternaria
Quaternaria Tul. & C. Tul.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Diatrypaceae, Xylariales, Xylariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on the host plant in terrestrial habitat. Sexual morph: see Mehrabi et al. (2016). Asexual morph: Conidiomata brown, acervular, separate or gregarious, subperidermal, immersed, simple or irregular in shape, unilocular, glabrous, thick-walled. Conidiomatal wall composed of pale brown to hyaline, thick-walled cells of texura angularis to intricata at the basal part. Conidiophores hyaline, branched, fasciculate, septate in association with branches, tapered towards the apices, formed from the inner cells of basal stroma. Conidiogenous cells hyaline, sympodial, cylindrical, integrated, indeterminate, smooth, thick-walled. Conidia hyaline, falcate or filiform, curved, aseptate, thin-walled, smooth, eguttulate.
Notes: Libertella is characterized by acervular conidiomata, holoblastic, sympodial, integrated conidiogenous cells and hyaline, falcate or filiform conidia (Sutton 1980). Saccardo (1880) listed L. faginea Desm. collected on Fagus sylvatica as the generic type, while Clements and Shear (1931) gave L. betulina Desm., collected on Betula sp. as lectotype species. Sutton (1980) revised Libertella and considered L. faginea representative of the genus, following Saccardo’s choice, because of its priority.
= Libertella Desm., Annls Sci. Nat., sér. 1 19: 275 (1830)
Type species: Quaternaria quaternata (Pers.) J. Schröt., in Cohn, Krypt.-Fl. Schlesien 3.2(4): 451 (1897) [1908]
Other accepted species: Species Fungorum – search Quaternaria.
References
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD 2020 – Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.