Rimora mangrovei Kohlm.

Rimora mangrovei (Kohlm. & Vittal) Kohlm., Volkm. - Kohlm., Suetrong, Sakay. & E. B. G. Jones Fig. 8 Description. Saprobic on decomposing wood of Ceriops tagal submerged in brackish water. Sexual morph: Ascomata 336–634 µm × 200–483 (x ̄ = 494 µm × 329 µm, n = 10) wide, globose to subglobose, black, carbonaceous, solitary to gregarious, immersed at first then later erumpent, with cleft-like ostiole, epapillate. Peridium 73–162 µm (x ̄ = 112 µm, n = 10) thick, cells forming textura angularis. Pseudoparaphyses up to 2 µm, trabeculate (sensu Liew et al. 2000), branched, numerous. Asci 175–181 × 9–15 µm (x ̄ = 178.8 × 12.4 µm, n = 10), 8 - spored, bitunicate, cylindrical, short pedicellate, with an apical apparatus. Ascospores 40–47 µm × 7–11 µm (x ̄ = 46.7 × 8.9 µm, n = 20), fusiform, hyaline, biseriate, 1 - septate, constricted at the septum, with multiple prominent guttules. Asexual morph: Undetermined. Known distribution. Thailand. Culture characteristics. Ascospores germinate in MEA within 24 hours, with germ tubes arising from one end of the ascospore. Colonies on MEA grow up to 6 cm after 14 days of incubation at room temperature, white, raised, fimbriated edge, reverse with light yellow pigment at the center which does not spread to the periphery. Material examined. Thailand • Prachuap Khiri Khan Province: Pranburi District, 12°24'48.672"N, 99°56'51.47"E, on decomposing wood of Ceriops tagal (Rhizophoraceae) submerged in brackish water, 25 October 2022, by Carlo Chris S. Apurillo, P 10705 (MFLU 24-0193), ex-type living culture MFLUCC 24-0516. GenBank Numbers. ITS: PP 989293, LSU: PP 989289, SSU: PP 989297. Notes. Based on a combined analysis of LSU, SSU and tef 1 - α sequences, Rimora mangrovei MFLU 24-0193 formed a well-supported clade with the holotype and other strains of Rimora mangrovei in Aigialaceae. This study identifies new characteristics not previously described for this species, including the presence of an apical apparatus in the asci and 1 - septate ascospores with multiple prominent guttules. Rimora mangrovei has been reported from various mangrove hosts such as Avicennia species, Bruguiera gymnorrhiza, Ceriops decandra, Nypa fruticans, Rhizophora species, and Sonneratia species across countries in the Atlantic, Indian and Pacific regions (Devadatha et al. 2021). This is the first record of isolation of Rimora mangrovei from Ceriops tagal in Prachuap Khiri Khan, Thailand.