The genus Cladosporium and similar dematiaceous ... - CBS - KNAW
The genus Cladosporium and similar dematiaceous ... - CBS - KNAW
The genus Cladosporium and similar dematiaceous ... - CBS - KNAW
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<strong>Cladosporium</strong> herbarum species complex<br />
Fig. 35. <strong>Cladosporium</strong> sinuosum (CPC 11839). A–D. Conidiophores. E–F. Conidia. Scale bars = 10 µm.<br />
<strong>Cladosporium</strong> sinuosum K. Schub., C.F. Hill, Crous & U. Braun,<br />
sp. nov. MycoBank MB504578. Figs 34–35.<br />
Etymology: Refers to the usually distinctly sinuous conidiophores.<br />
Differt a Cladosporio herbaro conidiophoris distincte sinuosis, conidiis solitariis vel<br />
breve catenatis, catenis non ramosis, echinulatis.<br />
Mycelium sparingly branched, 1–7 µm wide, septate, not<br />
constricted at the septa, subhyaline to pale brown, smooth to<br />
minutely verruculose, walls unthickened or slightly thickened,<br />
sometimes with small swellings. Conidiophores arising laterally<br />
from plagiotropous hyphae or terminally from ascending hyphae,<br />
erect, more or less straight to flexuous, often once or several times<br />
slightly to distinctly geniculate-sinuous, sometimes even zigzag-like,<br />
nodulose with small to large lateral shoulders, shoulders somewhat<br />
distant from each other or in close succession giving them a knotty/<br />
gnarled appearance, unbranched or once branched, 25–260 × 5–7<br />
µm, shoulders up to 10 µm wide, pluriseptate, septa sometimes<br />
in short succession, not constricted at the septa, pale brown to<br />
medium brown, smooth to minutely verruculose, walls thickened,<br />
often distinctly two-layered, up to 1 µm thick. Conidiogenous<br />
cells integrated, terminal or intercalary, often slightly to distinctly<br />
geniculate-sinuous, nodulose with small to large laterally swollen<br />
shoulders, 8–30 µm long, proliferation sympodial, with a single<br />
or up to three conidiogenous loci, usually confined to lateral<br />
www.studiesinmycology.org<br />
shoulders, protuberant, often denticle-like or on the top of short<br />
cylindrical stalk-like prolongations, 1.2–2(–2.2) µm diam, mainly<br />
2 µm, somewhat thickened <strong>and</strong> darkened-refractive, dome often<br />
slightly higher than the surrounding rim. Conidia solitary or in short<br />
unbranched chains with up to three conidia, straight, obovoid, oval,<br />
broadly ellipsoid to subcylindrical or sometimes clavate (broader at<br />
the apex), 9–21 × (5–)6–8 µm [av. ± SD, 14.5 (± 2.5) × 6.6 (± 0.7)<br />
µm], 0–1-septate, not constricted at the septa, septum more or less<br />
median, pale greyish brown, densely echinulate, spines up to 1 µm<br />
long, walls thickened, apex mostly broadly rounded or sometimes<br />
attenuated, towards the base mostly distinctly attenuated forming a<br />
peg-like prolongation, up to 2 µm long, hila protuberant, 1.2–2 µm<br />
diam, mainly 2 µm, somewhat thickened <strong>and</strong> darkened-refractive;<br />
microcyclic conidiogenesis not observed.<br />
Cultural characteristics: Colonies on PDA attaining 20 mm<br />
diam after 14 d at 25 ºC, pale olivaceous-grey due to abundant<br />
aerial mycelium, olivaceous-grey towards margins, iron-grey<br />
to olivaceous-black reverse, margin regular, entire edge, aerial<br />
mycelium abundant, cottony, dense, high, growth regular, low<br />
convex, radially furrowed in the centre, growing deep into the agar,<br />
with age numerous small to large prominent exudates, sporulation<br />
sparse. Colonies on MEA attaining 16 mm diam after 14 d at 25 ºC,<br />
white to pale smoke-grey, fawn reverse, velvety, margin undulate,<br />
glabrous, aerial mycelium abundant, dense, high, fluffy, growth<br />
raised with elevated colony centre, laterally furrowed, without<br />
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