Melanconis Tul. & C. Tul., Select. fung. carpol. (Paris) 2: 115 (1863).

Jaklitsch, Walter M. & Voglmayr, Hermann, 2020, The genus Melanconis (Diaporthales), MycoKeys 63, pp. 69-117 : 69

Melanconis Tul. & C. Tul., Select. fung. carpol. (Paris) 2: 115 (1863).

?= Melanconium Link: Fr., Mag. Gesell. naturf. Freunde, Berlin 3(1-2): 9 (1809).

Type species.

Melanconis stilbostoma (Fr.: Fr.) Tul. & C. Tul., Select. fung. carpol. (Paris) 2: 115 (1863).

Notes.

Tulasne (1856) had already mentioned Melanconis , but did not give a generic diagnosis. Hence, the species he newly described were invalid, but became validated by reference in Tulasne and Tulasne (1863) (Paul Kirk, pers. comm.).

In contrast to Diaporthe , species of Melanconis always develop in bark, never in wood and lack stromatic zones. Pseudostromata are pulvinate to conical, circular to elliptic in outline and usually slightly project beyond the bark surface with perithecial contours remaining indistinct. Ectostromatic discs usually project distinctly from the surface of the pseudostromata and are bright, white to yellowish, to brown when old.

Nomenclaturally, the older genus Melanconium potentially competes with the younger genus Melanconis . However, as outlined in Rossman et al. (2015), the generic concept of Melanconium and the true identity of its generic type, M. atrum , are obscure and they therefore recommended to protect the well-defined Melanconis over Melanconium , which was formally adopted in the last ICN ( Turland et al. 2018, Appendix III).