Pleosporales

Amorosiaceae

Amorosiaceae Thambug. & K.D. Hyde, in Thambugala et al., Fungal Diversity 74:199–266 (2015)

Index Fungorum number: IF551277; Facesoffungi number: FoF01084.

Fungicolous or saprobic on other fungi or dead wood. Sexual morph: Ascomata solitary or gregarious, immersed to semi-immersed, becoming erumpent, coriaceous, dark brown to black, globose to subglobose or conical, uniloculate, ostiolate. Ostiole crest-like, central, rounded, cylindrical, papillate. Peridium comprising several layers of dark brown to lightly pigmented cells of textura angularis, fusing with the stromata. Hamathecium comprising numerous, wide, cellular, septate, unbranched pseudoparaphyses, embedded in a gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, cylindrical to cylindricclavate, pedicellate, rounded at the apex, with an ocular chamber. Ascospores uni to tri-seriate, partially overlapping, hyaline, some light brown when mature, fusiform, to cylindrical, or ellipsoidal-fusiform, 1(–3)-septate, constricted at the central septum, filled with small guttules when immature, surrounded by a mucilaginous sheath. Asexual morph: hyphomycetous. Chlamydospores occasionally, formed in short chains, arising from the mycelium, individual chlamydospores subhyaline, broadly ellipsoid to subglobose. Conidiophores micronematous to semimacronematous, arising singly and not combined in sporodochia or synemmata, pale brown, unbranched, similar to the mycelium. Conidiogenous cells integrated, terminal or intercalary, where terminal, monoblastic, determinate, short-cylindrical to elongate-cylindrical, subhyaline to pale brown or brown, smooth-walled. Conidia solitary, dry, lateral, elongate-clavate, pale brown to brown, 1–3-septate, 3–4-septate when mature, constricted at the septa, smooth-walled, lacking any mucilaginous sheath or appendages.

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

Notes: The hyphomycete genus Amorosia was introduced from intertidal sediment in the Bahamas Islands by Mantle et al. (2006) to accommodate A. littoralis Mantle & D. Hawksw. Mantle et al. (2006) placed this genus in Sporormiaceae based on molecular phylogenetic analysis. Amorosia is characterized by micronematous to semimacronematous conidiophores, integrated, terminal or intercalary conidiogenous cells, elongate-clavate and 3–4-septate conidia with a distinct central pore in each septum.  Amorosiaceae mainly differs from Lophiostomataceae, Floricolaceae and Sporormiaceae in having hyphomycete asexual morphs and appears to grow within other ascomata of other ascomycetes and may be mycoparasitic.

 

References:

Mantle PG, Hawksworth DL, Pazoutová S, Collinson SJ, Rassing BR (2006) Amorosia littoralis gen. sp. nov., a new genus and species name for the scorpinoneand caffeine-producing hyphomycete from the littoral zone in The Bahamas. Mycological Research 110, 1371–1378.

Thambugala KM, Hyde KD, Tanaka K, Tian Q, Wanasinghe DN, Ariyawansa HA, Jayasiri SC, Boonmee S, Camporesi E, Hashimoto A, Hirayama K, Schumacher RK,  Promputtha I, Liu Z. 2015 – Towards a natural classification and backbone tree for Lophiostomataceae, Floricolaceae, and Amorosiaceae fam. nov. Fungal Diversity 74, 199–266.

 

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