The genus Cladosporium and similar dematiaceous ... - CBS - KNAW

Cladosporium herbarum species complex
Fig. 13. Cladosporium herbaroides (CPC 12052). Macro- and micronematous conidiophores and conidia. Scale bar = 10 µm. K. Schubert del.
like prolongation below the terminal swelling (due to sympodial
proliferation), unbranched or sometimes branched, 30–230 µm
long or even longer, 3–5 µm wide, swellings 5–8 µm wide, septate,
not constricted at septa, pale to medium olivaceous-brown,
smooth or almost so, walls slightly thickened. Conidiogenous cells
integrated, terminal or intercalary, cylindrical, usually nodulose to
nodose forming distinct swellings, sometimes geniculate, 15–55
µm long, with numerous conidiogenous loci usually confined to
swellings or situated on small lateral shoulders, sometimes on the
top of short peg-like prolongations or denticles, loci protuberant,
1–2 µm diam, thickened and darkened-refractive. Micronematous
conidiophores much shorter, narrower, paler, neither nodulose nor
geniculate, arising laterally from plagiotropous hyphae, often only
as short lateral denticles or branchlets of hyphae, erect, straight,
conical to cylindrical, unbranched, 3–65 × 2–3 µm, mostly aseptate,
sometimes up to five septa, subhyaline, smooth, walls unthickened.
Conidiogenous cells integrated, terminal or conidiophores reduced
to conidiogenous cells, conidiogenous loci solitary or sometimes
as sympodial clusters of pronounced denticles, protuberant, 1–1.5
µm diam, thickened and somewhat darkened-refractive. Conidia
polymorphous, two main morphological types recognisable, formed
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by the two different types of conidiophores, conidia formed by
macronematous conidiophores catenate, in branched chains,
straight to slightly curved, subglobose, obovoid, limoniform, ellipsoid
to cylindrical, 3–33 × (2–)3–6(–7) µm [av. ± SD, 14.5 (± 7.9) ×
5.2 (± 1.2) µm], 0–2(–3)-septate, sometimes slightly constricted at
septa, septa median or somewhat in the lower half, pale to medium
olivaceous-brown, verruculose to verrucose (granulate under
SEM), walls slightly thickened, with up to three rarely four distal
scars, with age becoming medium or even dark brown (chocolate
brown), wider and more thick-walled, 5.5–33 × (3.5–)5–9(–11) µm
[av. ± SD, 14.4 (± 6.9) × 7.2 (± 1.9) µm], walls up to 1 µm thick,
hila protuberant, 0.8–2(–2.5) µm diam, thickened and darkenedrefractive;
microcyclic conidiogenesis occurring. Conidia formed by
micronematous conidiophores paler and narrower, mostly formed
in unbranched chains, sometimes in branched chains with up to
three distal hila, straight to slightly curved, limoniform, narrowly
fusiform, almost filiform to subcylindrical, 10–26(–35) × 2–3.5
µm [av. ± SD, 15.6 (± 6.2) × 2.9 (± 0.5) µm], 0–1(–3)-septate,
subhyaline to pale brown, almost smooth to minutely verruculose,
walls unthickened, hila protuberant, 1–1.5 µm diam, thickened and
somewhat darkened-refractive.
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