Dendrostoma X.L. Fan & C.M. Tian, Persoonia 40: 126 (2018)

Jaklitsch, Walter M. & Voglmayr, Hermann, 2019, European species of Dendrostoma (Diaporthales), MycoKeys 59, pp. 1-26 : 1

Dendrostoma X.L. Fan & C.M. Tian, Persoonia 40: 126 (2018)

Type species.

Dendrostoma mali X.L. Fan & C.M. Tian.

Description, emended here.

Sexual morph: pseudostromata immersed in bark and erumpent, causing a pustulate bark surface, consisting of an ectostromatic disc and entostroma with embedded ascomata. Ectostromatic disc flat or convex, surrounded by bark flaps. Entostroma light-coloured, prosenchymatous to nearly pseudoparenchymatous, mixed with bark cells, sometimes forming a more-or-less conical central column beneath the disc. Stromatic zones lacking or sometimes bark dorsally darkened. Ascomata perithecial, subglobose. Ostioles flat in the disc or slightly projecting, cylindrical, often with conical apical part. Paraphyses deliquescent. Asci oblong, fusoid, narrowly clavate or subellipsoid, with a refractive apical ring, containing (4 –)6– 8 ascospores in various arrangements, becoming detached at maturity. Ascospores hyaline, ellipsoid, fusoid, oblong to subacicular, often inequilateral, straight to curved, bicellular, more-or-less constricted at the median or eccentric septum, smooth, with 2-4 drops or multiguttulate, often with gelatinous terminal appendages. Asexual morph: conidiomata acervular, either forming lateral locules on the ostiolar level of sexual pseudostromata or separate, conical to pulvinate, immersed-erumpent from bark; wall pseudoparenchymatous. Often a pseudoparenchymatous conical central column present beneath the covering layer. Conidiophores non-differentiated, hypha-like or reduced to conidiogenous cells. Conidiogenous cells phialidic, lining the inner walls of cavities, subcylindrical to ampulliform, hyaline, shades of brown with age. Conidia hyaline, aseptate, smooth, multiguttulate or not, thin-walled, oblong, ellipsoid to fusoid, straight or curved.