Lamproconium (Grove) Grove, British Stem- and Leaf-Fungi (Coelomycetes) (Cambridge) 2: 321 (1937)
Diaporthomycetidae, Diaporthales, Lamproconiaceae, Lamproconium
Index Fungorum number: IF8703; 1 morphological species; 1 species with sequence data.
Pathogenic and saprobic on dead herbaceous branches. Sexual morph: undetermined. Asexual morph: Conidiomata pycnidial, solitary, partly immersed in host tissue, uniloculate, multilocular or convoluted, dark blue, erumpent in the centre. Pycnidium thick-walled, thin at inner layer, hyaline, comprising wall cells of textura angularis. 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, hyaline to olivaceous, smooth-walled. Conidia fusiform, ellipsoid, thick-walled, with granular, contents granular, aseptate, bluish to glistening dark blue, smooth-walled, produced in mucilage but without a distinct mucilaginous envelope or appendage (adapted from Norphanphoun et al. 2016).
Type species: Lamproconium desmazieri (Berk. & Broome) Grove [as 'desmazierii'], British Stem- and Leaf-Fungi (Coelomycetes) (Cambridge) 2: 321 (1937)
Notes: Lamproconium was introduced by Grove (1918) as a section of Melanconium which was represented by M. desmazieri. Melanconium desmazieri was reported as the asexual morph of Melanconis desmazieri, from Tilia sp. (Petrak 1938). Grove (1937) re-circumscribed the species and found that M. desmazieri differed from the type species in having bluish to glistening dark blue and not brownish-black, 1-septate conidia. Therefore, Grove (1937) introduced Lamproconium as a new genus (Sutton 1980) which was placed in Diaporthales genera incertae sedis by Cannon & Minter (2014). Based on phylogenetic study and fresh collections of L. desmazieri, Norphanphoun et al. (2016) introduced Lamproconiaceae as new family for accommodate Lamproconium and Hescospora.