Harzia Costantin, Mucéd. Simpl. (Paris): 42 (1888)
MycoBank number: MB 8458; Index Fungorum number: IF 8458; Facesoffungi number: FoF 10517; 12 morphological species (Species Fungorum 2020), 10 species with sequence data.
Type species – Harzia acremonioides (Harz) Costantin
Notes – Harzia was introduced by Costantin et al. (1888) with the type species H. acremonioides (≡ Monosporium acremonioides), a seed-borne species from soil. The genus is characterised by hyaline mycelium and conidiophores and 1-celled, brown to golden brown, ovoid to subglobose, usually smooth-walled conidia, but sometimes with a slight wrinkling/exposure, and each species tending to vary in conidia size (Horne & Williamson 1923, Domsch et al. 1980). In the phylogenetic analysis, the genus formed a monophyletic clade in the family phylogenetic tree, and is sister to genus Melanospora with high bootstrap support (99%ML; Fig. 11)
Figure 11 – Phylogram generated from maximum likelihood analysis based on combined LSU, tef1 and ITS sequence data for Coronophorales. Related sequences are referred to Hongsanan et al. (2017). Seventy-nine strains are included in the combined analyses which comprised 2211 characters (1044 characters for LSU, 627 characters for tef1, 540 characters for ITS) after alignment. Members of Torpedosporales are used as outgroup taxa. Single gene analyses were carried out and the phylogenies were similar in topology and clade stability. The best RaxML tree with a final likelihood value of -23354.525618 is presented. Estimated base frequencies were as follows: A = 0.228019, C = 0.288494, G = 0.281955, T = 0.201533; substitution rates AC = 1.194725, AG = 2.787601, AT = 1.703067, CG = 0.955075, CT = 3.781057, GT = 1.000000; gamma distribution shape parameter a = 0.736138. Bootstrap support values for ML greater than 50% are given near the nodes. Ex-type strains are in bold. The newly generated sequences are indicated in blue.