Cladosporium benschii P. P. Costa, A. W. C. Rosado & O. L. Pereira, sp. nov.
Creators: name: Costa, Pricila P.
name: Rosado, André W. C.
name: Pereira, Olinto L.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Sordariomycetes
Xylariales
Xylariaceae
Cladosporium
Cladosporium benschii

description: 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.   
 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.
description: Published as part of Costa, Pricila P., Rosado, André W. C. & Pereira, Olinto L., 2022, Six new species of Cladosporium associated with decayed leaves of native bamboo (Bambusoideae) in a fragment of Brazilian Atlantic Forest, pp. 1-29 in Phytotaxa 560 (1) on pages 17-19, DOI: 10.11646/phytotaxa.560.1.1, http://zenodo.org/record/7031143