Pleosporales » Amorosiaceae


Amorosia Mantle & D. Hawksw., in Mantle et al., Mycol. Res. 110(12): 1373 (2006).

            Index Fungorum number: IF 500927; Facesoffungi number: FoF 08158, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Colonies effuse, dark brown, reverse dark brown. Sexual morph: Unknown. Asexual morph: Mycelium well-developed, superficial, composed of pale brown thin-walled hyphae, frequently septate, smooth-walled, sometimes anastomosing with themselves, often growing parallel on one another, sometimes with swellings close to septa. Setae and appressoria absent. Chlamydospores occasional, formed in short chains, arising from the mycelium, the cells of which may be up to 4 mm thick, individual chlamydospores subhyaline, broadly ellipsoid to subglobose, somewhat uneven internally. Conidiophores micronematous to semi-macronematous, arising singly and not combined into sporodochia or synemmata, pale brown, similar to the mycelium. Conidiogenous cells integrated, terminal or intercalary, where terminal sometimes arising sympodially, monoblastic, determinate, short-cylindrical (where intercalary) to elongate-cylindrical (where terminal), subhyaline to pale brown, mainly 2–3 mm wide, smooth walled. Conidia arising singly, dry, lateral, elongate-clavate, pale brown to brown, 3–4-septate when mature, evenly pigmented, constricted at the septa, the septa with a distinct central pore ca 0.5 mm diam., smooth-walled, individual cells sometimes containing highly refractive granules, lacking any gelatinous sheath or appendage, germinating apically (adapted from Mantle et al. 2006).


Type species: Amorosia littoralis Mantle & D. Hawksw.


Notes: Amorosia is characterised by superficial, pale brown mycelium, monoblastic, determinate, short-cylindrical conidiogenous cells, elongate-clavate, pale brown to brown, 3–4-septate conidia. Amorosia resembles Trichocladium species in having elongated to subcylindrical multiseptate conidia but is phylogenetically distinct. Amorosia is morphologically and phylogenetically a distinct genus in Amorosiaceae. Molecular markers available for Amorosia are ITS, LSU and SSU.


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