Six new species of Cladosporium associated with decayed leaves of native bamboo (Bambusoideae) in a fragment of Brazilian Atlantic Forest Author Costa, Pricila P. 0000-0002-8728-133X Departamento de Microbiologia, Universidade Federal de Viçosa, Minas Gerais, Viçosa 36570 - 900, Brazil & pricila _ mba @ yahoo. com. br; https: // orcid. org / 0000 - 0002 - 8728 - 133 X pricila_mba@yahoo.com.br Author Rosado, André W. C. 0000-0003-4781-2033 Departamento de Fitopatologia, Universidade Federal de Viçosa, Minas Gerais, Viçosa 36570 - 900, Brazil & andre. rosado. fip @ gmail. com; https: // orcid. org / 0000 - 0003 - 4781 - 2033 andre.rosado.fip@gmail.com Author Pereira, Olinto L. 0000-0002-0274-4623 Departamento de Microbiologia, Universidade Federal de Viçosa, Minas Gerais, Viçosa 36570 - 900, Brazil & Departamento de Fitopatologia, Universidade Federal de Viçosa, Minas Gerais, Viçosa 36570 - 900, Brazil & oliparini @ ufv. br; https: // orcid. org / 0000 - 0002 - 0274 - 4623 oliparini@ufv.br text Phytotaxa 2022 2022-08-29 560 1 1 29 http://dx.doi.org/10.11646/phytotaxa.560.1.1 journal article 10.11646/phytotaxa.560.1.1 fc9f5cb4-6cf7-47d8-bdc0-71f3ae1e79c5 1179-3163 7031143 Cladosporium benschii P.P. Costa , A.W.C. Rosado & O.L. Pereira sp. nov . (Figure 4) MycoBank : MB824727 Systematic position : Fungi, Ascomycota, Pezizomycotina , Dothideomycetes , Dothideomycetidae, Cladosporiales, Cladosporiaceae Etymology :—Name in honor of Konstanze Bensch for her extensive work on Cladosporium . Colonies on PDA attaining 73 mm diam, greenish glaucous, flat, dense, felty; reverse similar to surface. Colonies on MEA attaining 70 mm diam, greenish glaucous, flat, dense, felty; reverse dark green to dark bluish-green. Colonies on OA attaining 57 mm diam, greenish glaucous to isabelline, woolly, lavender grey cottony patches at the center, greenish glaucous to olivaceous buff, velvety, furrowed at the border; reverse olivaceous grey. Colonies on SNA attaining 57 mm diam, buff to vinaceous buff, flat, sparse; reverse buff. Mycelium sparse, 1.95–5.51 µm wide, septate, occasionally somewhat swollen and slightly constricted at the septum, subhyaline to pale brown, brown darker close to the conidiophore, irregularly rough-walled. Conidiophores solitary, macronematous, 30.56–305.93 × 2.49–3.62 µm, arising laterally from the hypha, erect or flexuous, cylindrical-oblong, cylindrical attenuated toward the apex to sometimes filiform, non-geniculate, pale brown to brown, sometimes subhyaline, unbranched, septate 1–13, conspicuous, walls slightly thickened, verruculose, rarely micronematous, lateral, 20.69–36.16 × 2.18–3.38 µm, pale brown, 1 apical locus. Conidiogenous cells integrated, terminal, cylindrical oblong or cylindrical slightly attenuated to apex, non-geniculate, sometimes swollen at apex, in terminal cells apex usually head-like swollen with pronounced subdenticulate to denticulate loci crowded at the tip, 11.13–37.59 × 2.32–3.62 µm, pale brown, with 1–5 loci at apex, conidiogenous loci non-protuberant or only slightly so, rarely thickened and darkened. Ramoconidia absent. Secondary ramoconidia oblong-ellipsoid, cylindrical, cylindrical-ovoid, 2–3 loci, non-protuberant, darkened, 5.80–13.56 × 2.65–3.84 µm, 0–1 septate, brown, pale brown to subhyaline. Conidia numerous, catenate, acrogenous, ellipsoid, limoniform, ovoid, subglobose, pale brown to brown, 3.85–6.09 × 2.04–3.04 µm, terminal conidia obovoid, globose, and subglobose, 3.01–4.82 × 2.08–2.96 µm. Microcyclic conidiogenesis rarely occurs, with conidia forming secondary conidiophores. FIGURE. Cladosporium benschii ( VIC 44412 , holotype ). A–D . Colonies on A . Potato dextrose agar; B . Malt extract agar; C . Oatmeal agar; D . Synthetic nutrient-poor agar, after 14 days at 25 ºC, under near-ultraviolet light, respectively. E–J . Non-geniculate macronematous conidiophores and conidia. K . Conidiogenous cells with slightly protuberant loci. L . Micronematous conidiophores. M . Microcyclic conidiogenesis. Scale bars: E–M = 20 µM. Type :— Brazil . Minas Gerais : Araponga , at “ Parque Estadual da Serra do Brigadeiro ”, isolated from decayed leaf of Aulonemiae amplissima ( Poaceae ), March 15, 2016 ( holotype VIC 44412 , ex-type culture COAD 2263) . GenBank: MT373128 ( ACT ), MT680207 ( TEF1-α ), MZ318436 (rDNA-ITS) Additional specimen examined :— BRAZIL . Minas Gerais :Araponga, at “Parque Estadual da Serra do Brigadeiro”, isolated from decayed leaf of Aulonemia amplissima ( Poaceae ), 15 March 2016 , (living culture COAD 2265). Notes : — Cladosporium benschii is phylogenetically close to C. tenuissimum but forms a separate clade that evidences the existence of a new species. Both have cylindrical-oblong conidiophores, sometimes filiform, pale brown to brown, unbranched, with terminal conidiogenous cells usually head-like swollen with pronounced subdenticulate to denticulate loci crowded at the tip ( C. tenuissimum up to 8, while C. benschii up to 5). Cladosporium benschii differs from this species in having limoniform and subglobose intercalary conidia, measuring 3.85−6.09 × 2.04−3.04 µm, while at C. tenuissimum are ovoid, ellipsoid or subcylindrical, reach 4−12(−17) × (1−)2−3(−4.5) μm µm length. The presence of ramoconidia was reported in the last species, while in C. benschii has not been observed.