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15-11-2020 17:22

Stephen Martin Mifsud Stephen Martin Mifsud

Trying to identify a white mould growing on the su

14-11-2020 02:33

Manak Roman

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Mould growing on glass with penicillate conidiophores
Stephen Martin Mifsud, 15-11-2020 17:22
Stephen Martin Mifsud
Trying to identify a white mould growing on the surface of glass. Colonies slow-growing, white (magnolia) forming small humps with clefts on PDA, possibly xerophilic (growth temp at 22C = 8mm colonies).

Under the microcope I saw realtively thick curved mycelia but loose and not interwoven, irregular/flexuose, septate, losely branching, 7-9 um thick, rather stout and robust.  Conidiphore not numerous, thick, solitary or few branched (x3) very long, swollen at the top, penicillate conidiogenesis apparatus with few(-several)  clustered  phiaides (?), irregular in length like many fingers. The condiospores seems to be rectangular and of various sizes up to 12um.

I think it is an Aspergillus, but not one I am familiar with. 

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Stephen Martin Mifsud, 16-11-2020 04:37
Stephen Martin Mifsud
Re : Mould growing on glass with penicillate conidiophores

Aspergillus vitricola and A. tonophilus has been previously isolated from glass, but I don't think they are my specimen. However are there Aspergillus with rectangular spores, shortly catanate? ? 


/https://www.jstage.jst.go.jp/article/jplantres1887/75/893/75_893_436/_pdf/-char/en