Dear Frederick Robson,

There is a very good monograph on Aspergillus and I would suggest using their key.

The Yellow spore color might be something of interest as most species are green to black.

The yellow species Aspergillus flavipes looks like it has gross morphology of the fungus potentially.

A DNA blast analysis would be very effective for complementing your morphology study. I would like to have a slide culture with measurements to be more grounded for traditional identification but the multi phasic identification is most appropriate as well as identifying seasoned specialized mycologists who specialize in Aspergillus.

Good luck in your ID. PRH

Hi : It look like Aspergillus ochraceus, but you should use a taxonomy key or a molecular technique to identify the species.  

57

I think if you used a molecular better to confirm the species

Thank you

Aspergillus is characterized on its cultural and morphological characters on Czapek agar.  Study the aspergillus and compare with Aspergillus ochraceous.

Thank you all.

Its definitely closely related to Aspergillus ochraceous, But I do not have the resources to perform a molecular technique.

You can identify A. ochraceous on morphology. Grow the apsergillus on Czapek's agar.  Incubate at 26-30 degree C.  Note obverse colour, ochraceous shades, and reverse colour. Examine the growth under microscope. Note colour of conidiophore, measure conidiophore length,  conidiophore wall rough/pitted  or not,  vesicle size , shape. They are globose, 60-75 microns,  phialides in two series, primary 15-30 micron, secondary 7-10 x1.5-2 micron, Conidia globose to elliptical, smooth or delicately spinulose, yellow, 3.5-5 microns. Sclerotia may be present, vinaceous or purple. Compare your findings with those of others. There can be variation.  You may not be able to say whether it is old or new one. Contact  an expert.

the microscopic slides are loos like  A. ochraceous but the colony colours are refers towards A. terreus, if hulle cells finds.

Oadi Matny could be right. Amplify with ITS primers and confirm it.

you shoud use a taxonomy key .