Fungalpedia – Note 627, Caribaeomyces
Caribaeomyces Cif.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Microthyriaceae, Microthyriales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic on upper surface of leaves. Superficial mycelium brown, septate, branched with appressoria present. Sexual morph: Thyriothecia gregarious or solitary, superficial, orbicular, membranous to carbonaceous, brown to black, basal peridium poorly developed, opening by a central pore at maturity. Upper wall consisting of brown, radially arranged cells of textura porrecta branching at margins. Peridium 2-layered, outer cells pseudoparenchymatous, pigmented thick wall, tightly arranged, inner pale brown cells of textura prismatica. Hamathecium comprising asci inclined towards the central ostiole, lacking or with pseudoparaphyses. Asci 4-spored, bitunicate, fissitunicate, obclavate, apedicellate, apically rounded, not bluing in IKI, ocular chamber not observed. Ascospores overlapping biseriate, clavate or ovate to ellipsoidal, upper cell wider and shorter than lower cell, hyaline, 1-septum, with guttules in each cell, smooth-walled. Asexual morph: Undetermined (Ciferri 1962; Wu et al. 2011a).
Notes: Caribaeomyces was established by Ciferri (1962) with the type species C. tetrasporus which was designated as Calopeltis tetraspora (Chardón and Toro 1934). This genus is characterized by thyriothecia with central dehiscing ostiole, appressorial hyphae, 4-spored asci with 1-septum, hyaline, slightly curved, guttulate ascospores. Caribaeomyces is morphologically similar to Asterina by orbicular, thyriothecia opening by a star-like fissure and superficial hyphae with appressoria, however it differs from Asterina by 4-spored asci with relatively small, curved, hyaline ascospores (Fig. 1). Ciferri (1962) formally placed Caribaeomyces in Microthyriaceae and this was followed by Lumbsch and Huhndorf (2010) and Wu et al. (2011a). We follow Hongsanan et al. (2020a) and Wijewardene et al. (2022) and accept this genus in Asterinales incertae sedis based on its morphology.
Type species: Caribaeomyces tetrasporus (Toro) Cif. [as ‘tetraspora’], Atti Ist. bot. Univ. Lab. crittog. Pavia, Ser. 5 19: 98 (1962).
Other accepted species: Species Fungorum – search Caribaeomyces.
Figure 1 – Caribaeomyces tetrasporus (isotype, BPI 698559B). a Ascomata. b Ascus. c Ascospores. Scale bars: a = 20 μm, b = 10 μm. Redrawn from Wu et al. (2011a)
References
Chardón CE, Toro RA 1934 – Mycological explorations of Venezuela. Monographs Univ Puerto Rico Ser B 2:1–351.
Ciferri R 1962 – Schedae mycologicae. XXXV–XCVIII. Atti dell’Istituto Botanico della Università e Laboratorio Crittogamico di Pavia Ser. 5 19:85–139.
Lumbsch HT, Huhndorf SM 2010 – Outline of Ascomycota 2009. Myconet 14:1–64.
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023