Fungalpedia – Note 3007, Bloxamiella
Bloxamiella. W.P. Wu & Y.Z. Diao.
Citation when using this data: Wenping W & Yongzhao D. 2023– Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank
Classification:Pezizellaceae, Helotiales, Leotiomycetidae, Leotiomycetes, Pezizomycotina, Ascomycota, Fungi
Etymology: Refers to its similarity to Bloxamia in sporodochial conidiomata, chalara-like collarettes, and hyaline conidia.
Pathogenic on fern, causing leaf spot. Anamorph: Conidiomata sporodochial, hypophyllous, erumpent, solitary or crowded along the margins of the pinnule, discoid, slimy, amber-colored, black; basal stroma of textura intricata, dark brown towards the host tissue, and paler towards the external side. Conidiophores often reduced to the phialidic conidiogenous cells arising from the stroma surface in a densely packed palisade, discrete, subcylindrical, pale brown, becoming paler towards the apex, smooth. Conidia endogenous, basipetal, extruded in short easily fragmenting chains, cylindrical, truncate at both ends, aseptate, hyaline, smooth. Teleomorph: Ascomata apothecial, hypophyllous, sometimes associated with the conidioma on the same pinnula, erumpent, scattered at the margin of the pinnulae, discoid or cupulate (when dry), solitary, sessile, slimy, tough, black; basal stroma of textura intricata; medullary excipulum of textura epidermoidea, composed of thin-walled hyphae, sub-hyaline to hyaline. Paraphyses unbranched, filiform, swollen at the tip, septate, hyaline, smooth. Asci unitunicate, subcylindrical or clavate, without croziers, straight to curved, 8-spored, with small euamyloid apical ring, hyaline, smooth. Ascospores uniseriate, rarely biseriate, fusoid, straight, 1-septate, with one cell slightly larger, biguttulate, hyaline, smooth. (Adapted from Guatimosim et al. 2016).
Ecology/substrate/host: Pathogenic on frond of ferns.
Geographical distribution: Brazil (Guatimosim et al. 2016).
Description and illustration: Guatimosim et al. (2016).
Notes: Bloxamia cyatheicola, the type species of the new genus, was originally described with both anamorph and teleomorph for a fern pathogen in Brazil. The anamorphic state resembled other species of Bloxamia in sporodochial conidiomata, cylindrical phialides densely packed into palisade, and hyaline, aseptate and cylindrical conidia (Pirozynski and Morgan-Jones 1968; Nag Raj and Kenrick 1975). In phylogenetic analyses from this study, Bloxamia cyatheicola clustered together with the other two chalara-like fungi Zymochalara cyatheae and Z. lygodii, as a strongly supported group distinct from other Bloxamia and Chalara species. The genus Zymochalara is morphologically similar to Chalara in producing solitary conidiophores consisting of a venter and a collarette, and hyaline, aseptate and cylindrical conidia. The new genus Bloxamiella is created as a monotypic genus to accommodate B. cyatheicola, which is phylogenetically and morphologically related to Zymochalara, but belong to two different genera.
Type species: Bloxamia cyatheicola Guatim., R.W. Barreto & Crous, in Guatimosim, Schwartsburd, Barreto & Crous, Mycol. Progr. 15(12): 1249 (2016)
Other accepted species: Species Fungorum – search Bloxamiella.
References
Pirozynski KA, Morgan-Jones G 1968 – Notes on microfungi III. Trans Br Mycol Soc 51:185–206.
Entry by
Wenping Wu, R&D Center, Novozymes China, No. 14 Xin Xi Lu, Shangdi Zone, Haidian District, Beijing 100085, People’s Republic of China
Published online 28 August 2026