Search on : Taxa descriptions

 


   
Literature:
 
Page number:118 
Remarks (internal):Originally the genus contained lichenicolous and non-lichenicolous species, but of the latter, L. resinae was later referred to Epithyrium (Sacc.) Saccardo & Trotter (1913) and has been selected as lectotype species for that genus, and L. boreale with smooth conidia does not at the moment appear to be congeneric although there appears to be no other satisfactory available generic name for it. This leaves Lichenoconium as a genus of solely lichenicolous hyperparasites. Hawksworth (1977) revised the genus and accepted 10 species, including L. boreale which occurs on decorticated wood of Pinus. The species were fully keyed out and amply illustrated 
Description type:Non-original description 
Description:LICHENOCONIUM Petrak & Syd., Beih. Rep. spec. nov. regni veg. 42: 432 (1927).
Original spp.: L. lichenicola (Karst.) Petrak & Syd., L. cladoniae (Ell. & Ev.) Petrak & Syd., L. lecanoracearum (Vouaux) Petrak & Syd., L. pyxidiatae (Oud.) Petrak & Syd., L. jaapii (Died.) Petrak & Syd., L. resinae (Sacc. & Berl.) Petrak & Syd., L. boreale (Karst.) Petrak & Syd.
Lectotype sp.: L. lichenicola (Karst.) Petrak & Syd. (syn. Coniothyrium lichenicola Karst.), fide Clements & Shear (1931).
Illustration: Hawksworth (1977).
Mycelium immersed, branched, septate, pale brown. Conidiomata pycnidial, immersed to semi-immersed, separate, occasionally gregarious, dark brown to black. globose, unilocular, thick-walled; wall consisting of medium brown, thickwalled textura angularis, somewhat darker in the upper region. Ostiole absent, dehiscence by breakdown of upper wall, finally appearing cupulate. Conidiophores absent. Conidiogenous cells holoblastic, annellidic, indeterminate, discrete, cylindrical or long lageniform, hyaline or pigmented towards the apices, smooth, with 0-3 apical annellations formed from the inner pycnidial wall cells. Conidia aseptate, base truncate, often with a frill, apex obtuse, thick-walled, various shades of brown, verrucose, eguttulate, globose, obovate, obpyriform.

.
 
Taxon name: