2.5.6 Hypoxylon aurantium and H. mangrovei

Dayarathne et al. (2020a) introduced these two species based on morphological observations and nucleotide differences of the ITS and tub2 gene loci. Hypoxylon aurantium is a distinctive Hypoxylon species in possessing a bright orange ascostromatal surface which is somewhat similar to H. fendleri (Vasilyeva et al. 2007) . Hypoxylon aurantium and H. fendleri formed a sister lineage with high statistical support (97 % ML, 0.97 PP) and the base pair difference of ITS and tub2 gene loci accounts 52 out of 604 (84 %) and 163 bp out of 1028 bp (15 %), respectively. Hypoxylon mangrovei strains formed a well-separated (100 % ML, 1.00 PP) lineage in a sister clade to H. lenormandii, with which it shares some morphological features. They differ in the size of stromata (2 – 3.5 × 1.5 – 2.8 × 0.4 – 1 mm vs. 13 – 85 × 6 – 27 × 0.5 – 1 mm) and base pair difference: ITS, 27 bp out of 470 bp (5.7 %) and tub2 73 out of 594 (12.3 %) and RPB 2 data.