Lamproconiaceae Norph., T.C. Wen & K.D. Hyde, Phytotaxa 270(2): 94 (2016)
MycoBank number: MB 552187; Index Fungorum number: IF 552187; Facesoffungi number: FoF 02248; 14 species.
Pathogenic and saprobic on dead herbaceous branches. Sexual morph: Stromata prosenchymatous around perithecia, delimited externally by greenish-blackened dense pseudoparenchymatous zone, interior whitish, composed of interwoven hyphae mixed with substrate cells, 3–5 ascomata in a stromata. Ascomata perithecial, small, aggregated, scattered, globose to subglobose, light brown to dark brown, coriaceous, ostiolate, papillate. Papilla converging and erumpent through stroma surface as single, large opening, wide at the top, narrowing towards the base, dark brown region around base of papilla. Peridium comprises light brown, compressed, cells of textura angularis. Asci 8-spored, unitunicate, cylindrical, short pedicellate, with a J-, apical ring. Ascospores uniseriate, broadly ellipsoid, 1-septate, not or lightly constricted at the septa, hyaline, smooth-walled. Asexual morph: Conidiomata pycnidial, solitary, partly immersed in host tissue, uniloculate, multilocular or convoluted, dark blue (Lamproconium), dark blackish brown (Hercospora), erumpent in the centre. Pycnidium thick-walled, thin at inner layer, hyaline (Lamproconium), dark brown (Hercospora), comprising wall cells of textura angularis (Lamproconium) or textura intricate (Hercospora). Ostiole absent, dehiscence irregular. Paraphyses interspersed within conidiophores. Conidiophores filiform or cylindrical, pale-bluish or hyaline, septate, branched, smooth-walled, formed at the base of conidiomatal wall. Conidiogenous cells holoblastic, cylindrical to subcylindrical, each forming a single conidium at the conidiophore apex, or annellidic, colourless to olivaceous, smooth-walled. Conidia fusiform, ellipsoid, thick- walled, with granular, contents granular, aseptate, bluish to glistening dark blue (Lamproconium), hyaline (Hercospora), smooth-walled, produced in mucilage but without a distinct mucilaginous envelope or appendage (adapted from Norphanphoun et al. 2016).
Type genus – Lamproconium (Grove) Grove
Notes – Lamproconiaceae was established by Norphanphoun et al. (2016) to accommodate Lamproconium and Hercospora, based on morphology and phylogenetic analyses. Lamproconiaceae forms a robust clade basal to Sydowiellaceae and Stilbosporaceae in the combined ITS and LSU phylogeny and the conidia differ from those of Sydowiellaceae and Stilbosporaceae (Norphanphoun et al. 2016, Senanayake et al. 2017b).