Cladosporium bambusicola 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 bambusicola

description: Cladosporium bambusicola P. P. Costa, A.W.C. Rosado & O.L. Pereira sp. nov. (Figure 3)   
 MycoBank: MB824725   
 Systematic position: Fungi, Ascomycota, Pezizomycotina, Dothideomycetes, Dothideomycetidae, Cladosporiales, Cladosporiaceae   
 Etymology:—Name refers to the host from which the species was isolated, bamboo.   
 Colonies on PDA attaining 52 mm diam, dull green, greenish glaucous aerial mycelium, woolly, radially furrowed; sector formation, greenish glaucous, greenish-yellow at the margin, smoke grey aerial mycelium; reverse greenishgrey. Colonies on MEA attaining 50 mm diam, dark green to olivaceous grey, fluffy, woolly; reverse olivaceous black. Colonies on OA attaining 65 mm diam, smoke grey; pale olivaceous grey aerial mycelium, flat, wooly; reverse olivaceous grey. Colonies on SNA attaining 47 mm diam, flesh a rosy vinaceous, hazel, flat, sparse; reverse similar to surface. Mycelium scarce, 1.35–4.72µm wide, septate, sometimes very swollen and constricted at the septum, subhyaline to light brown, sometimes brown, irregularly rough-walled, stromatic hyphal aggregations, and numerous conidia. Conidiophores solitary, macronematous, 23.96–178.99 × 2.40–6.17 µm, arising terminal or laterally from hyphae, erect or flexuous, sometimes seceding at one of the lower septa, cylindrical attenuated towards the apex, sometimes filiform, non-nodulose, rarely geniculate towards the apex, pale brown to brown, sometimes becoming subhyaline towards the apex, 0–10 septate, more or less rough-walled, micronematous, lateral 5.56–21.08 × 2.01–2.78 µm, brown, narrowly cylindrical to filiform, 1–2 loci, 0–1 septum. Conidiogenous cells integrated, mostly terminal, cylindrical, cylindrical-filiform, sometimes geniculate with a small lateral shoulder at apex, 9.13–47.04 × 1.58–4.19µm, brown to pale brown, with 1–4 loci at apex, conidiogenous loci non-protuberant or only slightly so, thickened and darkened. Ramoconidia once or rarely formed, cylindrical-oblong attenuated to apex, 33.90–39.71 × 4.34–5.80µm aseptate, brown, truncate base, unthickened, refractive. Secondary ramoconidia ellipsoid, filiform, oblong-ellipsoid, sometimes subglobose, 1–4 distal hila, slightly thickened, 6.28–26.25 × 2.06–5.51 µm, 0–3 septate, subhyaline, pale brown to sometimes brown. Conidia numerous, catenate, acrogenous, aseptate or once septate, subhyaline to dark brown, intercalary conidia fusiform, ellipsoid-ovoid to subglobose 4.16–10.79 × 2.66–5.27 µm, terminal conidia subglobose to globose, sometimes obovoid, aseptate, 3.29–7.26 × 3.31–5.73 µm. Occurrence of microcyclic conidiogenesis.   
 Type:— Brazil. Minas Gerais: Araponga, at “ Parque Estadual Serra do Brigadeiro ”, isolated from decayed leaf of Aulonemia amplissima (Poaceae), March 15, 2016, (holotype VIC 44237, ex-type culture COAD 2256).   
 GenBank: MT373125 (ACT), MT680204 (TEF1-α), MZ318433 (rDNA-ITS)   
 Additional specimen examined:— BRAZIL. Minas Gerais: Araponga at “Parque Estadual Serra do Brigadeiro”, isolated from decayed leaves of Aulonemia amplissima (Poaceae), 15 March 2016 (living culture COAD 2255).   
 Notes: — Cladosporium bambusicola is a sister group of C. brigadeirensis, but the two species present morphological differences. Cladosporium bambusicola forms two types of intercalary conidia markedly different from each other. One smaller conidia type, fusiform, ellipsoid, ellipsoid-ovoid, ellipsoid-cylindrical, aseptate, subhyaline to pale brown, smooth. Another conidia type is predominantly larger, rarely catenate, subglobose, ellipsoid, limoniform, oblong, oblong-ellipsoid, brown to dark brown, wall rough, thickened. However, it is not possible to differentiate the conidiophore that originated these conidia as in Cladosporium herbaroides (C. herbarum species complex), which also have two morphological types of conidia. However, they are formed by two different conidiophores, macronematous and micronematous (Bensch et al. 2012). Cladosporium brigadeirensis does not have ramoconidia and its secondary ramoconidia is on average half the size of C. bambusicola. The conidial chains tend to be larger in the last species, while C. brigadeirensis form a cluster of conidia at the base of conidiogenous cells.
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 15-17, DOI: 10.11646/phytotaxa.560.1.1, http://zenodo.org/record/7031143