Pleosporales » Aigialaceae

Rimora

Rimora Kohlm., Volkm.-Kohlm., Suetrong, Sakay. & E.B.G. Jones, in Suetrong et al., Stud. Mycol. 64: 166 (2009).

Index Fungorum number: IF 515958; Facesoffungi number: FoF 08152, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on host. Sexual morph: Ascomata erumpent, with flat tops, elongated, apapillate, opening with a periphysate cleft-like ostiole, black, gregarious. Peridium of thick-walled cells, forming a textura angularis. Hamathecium of branched pseudoparaphyses. Asci 8-spored, cylindrical, pedunculate, thick-walled, fissitunicate, without apical apparatus. Ascospores biseriate, fusiform, 3-septate, hyaline, surrounded by an evanescent sheath. Asexual morph: Unknown (adapted from Suetrong et al. 2009).

 Type species: Rimora mangrovei (Kohlm. & Vittal) Kohlm., Volkm.-Kohlm. Suetrong, Sakay. & E.B.G. Jones

Notes: Rimora is characterised by black, carbonaceous, gregarious ascomata, with cleft-like, central, periphysate ostiole, cylindrical, short pedicellate asci and fusiform, hyaline, initially 1–septate, later becoming 3-septate, pale brown or brown ascospores surrounded by an evanescent sheath. Kohlmeyer and Vittal (1986) described Rimora mangrovei as Lophiostoma mangrovei on bark and wood of mangrove trees from Belize and India. Hyde et al. (2002) transferred R. mangrovei to Astrosphaeriella based on the trabeculate pseudoparaphyses. Liu et al. (2011) reported that A. mangrovei is different from other species in Astrosphaeriella in having a round flattened ascomata, slit-like ostioles and dicotyledonous hosts. Consequently, Suetrong et al. (2009) introduced Rimora to accommodate A. mangrovei based on phylogenetic evidence. Rimora resembles Aigialus and Ascocratera in having carbonaceous, apapillate ascomata, trabeculate pseudoparaphyses, cylindrical asci with an apical apparatus and ascospores surrounded by an evanescent sheath but differs in ascospore morphology with brown and muriform in Aigialus and hyaline and 1–3-septate in Ascocratera and Rimora. Rimora is a distinct and well-defined genus in Aigialaceae. Molecular markers available for Rimora are LSU, SSU, RPB2 and TEF-1.

 

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