Rhytidhysteron bruguierae

Calabon, Mark S., Jones, E. B. Gareth, Pang, Ka-Lai, Abdel-Wahab, Mohamed A., Jin, Jing, Devadatha, Bandarupalli, Sadaba, Resurreccion B., Apurillo, Carlo Chris & Hyde, Kevin D., 2023, Updates on the classification and numbers of marine fungi, Botanica Marina (Warsaw, Poland) 66 (4), pp. 213-238 : 228

2.5.20 Rhytidhysteron bruguierae ( Figure 7 )

Rhytidhysteron bruguierae occurring on decaying Bruguiera wood, is phylogenetically related to the species R. mangrovei and R. thailandicum based on 18 S, 28 S rDNA and TEF- 1α genes ( Dayarathne et al. 2020a). Morphologically, R. bruguierae differs from the two species in having a red epithecium and thicker exciple ( Kumar et al. 2019; Thambugala et al. 2016). Base pair differences of TEF- 1α gene between R. bruguierae and R. mangrovei / R. thailandicum were over 3 % and were regarded as sufficient to warrant description of a new taxon ( Jeewon and Hyde 2016). The type species of Rhytidhysteron is R. brasiliense which has no available sequences in GenBank ( Spegazzini 1881). It is essential to obtain a culture of the type species to validate the taxonomic position of R. bruguierae and other species.

Figures

Figure 7: Rhytidhysteron bruguierae. (A–C) Appearance of hysterothecia on host. (D, E) Vertical section through hysteriothecium.(F, G) Cells of peridium. (H, I) Pseudoparaphyses, asci, and ascospores. (I) Stained with lactophenol cotton blue. (J–O) Ascospores. Scale bars: (A) = 1 mm, (B–E) = 200 μm, (F–I) = 50 μm, (J–O) = 5 μm.