Pleosporales, Luttrell ex M.E.Barr, 1987

Mlčoch, Patrik & Matušinsky, Pavel, 2024, Phylogenetic and morphological revision sexual stages of the genus Paraphoma (Phaeosphaeriaceae) and next related species from clade of Ophiobolus-like (Phaeosphaeriaceae), Phytotaxa 663 (4), pp. 184-204 : 200

Key for determination of phragmosporous species of Pleosporales associated with dead stems of Lamiaceae

This dichotomous key is literature research usually original descriptions of phragmosporus taxa, which are associated with dead herbal stems of Lamiaceae (Mlčoch P. 2021; Feltgen 1903; Passerini 1888; Petrak F. 1927; Petrak F. 1953; Saccardo P. A., Saccardo D., Traverso G.B., Trotter A. 1928; Saccardo P. A. & Sydow P. 1899; Saccardo P.A., Traverso G. B., Trotter A. 1883; Strasser 1907; Urries 1945). In this key are mainly taxa, which belong to the valid concept of the genus Leptosphaeria s. l. Majority this species needs taxonomic and phylogenetic revision.

1. ascospores constantly 3-septate..........................................................................................................................................................2

1. ascospores variable 3 or more septate ................................................................................................................................................6

2. ascospores 30–34 μm on length, fusiform to clavate, asci clavate, short stalked, on Lamiaceae ....... Leptosphaeria fiumana Hazsl.

2. ascospores less than 30 μm on length.................................................................................................................................................3

3. ascoma conical, mainly to concentric sulcate, more than 350 μm in diam., ascomal wall consist of cells of textura angularisprismatica or textura prismatica, asci more than 70 μm on length, cylindrical, ascospores more than 18 μm on length, yellowish brown, cells +/- constrict to septum ...................................................................................................................................................4

3. ascoma less than 350 μm in diam., globose to hemiglobose, ascomal wall consist of cells of textura angularis, asci less than 70 μm on length, ascospores with different characters..................................................................................................................................5