Rimora mangrovei (Kohlm. & Vittal) Kohlm.

Rimora mangrovei (Kohlm. & Vittal) Kohlm. View in CoL , Volkm. - Kohlm., Suetrong, Sakay. & E. B. G. Jones

Fig. 8 View Figure 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 GoogleMaps .

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.