Bretziella fagacearum

Figure 2. Morphological features of herbarium specimens and a living isolate of the oak wilt fungus. A, E, F, K Chalara quercina (BPI 595712, Lectotype) B, C, D, G, H, L Endoconidiophora fagacearum (FP 97476, Lectotype) I, J, M Living isolate treated as Ceratocystis fagacearum (CMW 2656 = CBS 138363, ex-epitype) A, B Dried cultures (arrow in B indicates the piece where ascomata were found) C, D Ascospores with sheaths (arrows) E–J Conidiophores K–M Conidia. Scale bars: C–J = 20 µm, K–M = 10 µm.

Figure 3. Line drawings of the oak wilt fungus. These illustrations are based on previously published line drawings and observations of the herbarium specimens (BPI 595712, FP 97476) in the present study. A Conidiophore and conidia in 10 % KOH (BPI 595712) B Ascomatal primordium re-drawn from Wilson (1956) C Median, histological section through ascoma embedded in the mycelial mat, re-drawn from Bretz (1952) D Ascospores in 10 % KOH (FP 97476) E Ostiolar hyphae (FP 97476). Scale bars: A, D = 10 µm, E = 50 µm, B, C = 100 µm.

Figure 1. Bayesian phylogram derived from the analyses of the concatenated dataset (60S, LSU, MCM7). Maximum likelihood bootstrap values (≥ 70 %, 1000 replicates) and Bayesian posterior probabilities values (≥ 0.95) are indicated at nodes. “-” indicated no phylogenetic support or the support values are below 70% for ML and 0.95 for BI.