Chaetophiophoma Speg., Anal. Mus. nac. B. Aires, Ser. 3 13: 388 (1911)
Facesoffungi number: FoF 07147
Leotiomycetes, Leotiomycetidae, Medeolariales, Dermateaceae
Saprobic on plant host in terrestrial habitat, forming numerous, conspicuous rounded, black conidiomata. Sexual morph: undetermined. Asexual morph: Conidiomata black, scattered to gregarious, pycnidial, immersed to semi-immersed, globose to subglobose, unilocular, glabrous, thick-walled, smooth. Ostiole absent, dehiscence by breakdown of peridium at upper region. Conidiomata wall composed of thick-walled, hyaline to pale brown cells of textura angularis. Conidiophores arising from the inner layers of pycnidium, hyaline, repeatedly branched at base and above, often fasciculate, septate, with acropleurogenously developing conidia. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical, indeterminate, integrated or discrete, thin-walled, smooth, with collarette and narrow channel. Conidia hyaline, fusiform to falcate, aseptate, thick-walled, smooth, guttulate.
Type species: Chaetophiophoma trematis Speg., Anal. Mus. nac. B. Aires, Ser. 3 13: 388 (1911)
Notes: Chaetophiophoma is characterized by pycnidial, globose, pale brown, unilocular conidiomata, branched, septate conidiophores, and hyaline, falcate, unicellular, guttulate conidia. A new collection from Sorbus aucuparia shares similar characters with C. trematis in form of conidiomata, conidiophores, conidiogenous cells and conidia, but differs in dimension of conidiomata and conidia. However, the new collection has larger conidiomata and smaller conidia than C. trematis (conidiomata: 50–75 µm diam., conidia: 16–24 × 2 µm). Unfortunately, molecular data for C. trematis is not available in GenBank, but C. sorbi is introduced as new species based on distinct morphology.
Distribution: Italy, Argentina (Sutton 1980, this study).
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.