Other sources have identified many species of Aspergillus as producing dry, hydrophobic spores that are easily inhaled by humans and animals.

[3] Later, Aspergillus pallidus was concluded to be a white variant (synonym) of A. clavatus by Samson (1979), which was supported by the identical DNA sequences of the two species.

[4] A sexual stage was described in 2018 with a Neocarpenteles teleomorph but under the one fungus-one name convention the original A. clavatus epithet was retained.

[5] Aspergillus clavatus undergoes rapid growth, resulting in the formation of a velvety and fairly dense felt that is observed to be bluish-grey green in colour.

[6] The emerging conidial heads are large and clavate when very young, quickly splitting into conspicuous and compact divergent columns.

[7] The conidia bearing conidiophores are generally coarse, smooth walled, uncoloured,[7] hyaline and can grow to be very long.

[5] Aspergillus clavatus colonies grow rapidly on Czapek's solution agar, reaching 3.0–3.5 cm, in 10 days at 24–26 °C.

But generally, a comparatively thin surface layer of mycelial felt is observed, which produces a copious number of erect conidiophores.

However, with time, they split into two or more divergent and compressed cordial chains reaching 1.00 mm portraying a colour consisting of artemisia green to slate olive.

It can absorb and collect hydrocarbons from fuel oil, incorporate metaphosphate and synthesize ethylene, clavatol and kojic acid.

[9] When it comes to genomics, bioinformatic analysis revealed that A. clavatus contains a full complement of identified euascomycete sex genes.

[8] Aspergillus clavatus is often described as a spoilage organism occurring on dung and in soil and can also grow in strong alkaline conditions.

And is also found in Bangladesh, Sri Lanka, Hong Kong, Jamaica, Brazil, Argentina, South Africa, the Ivory Coast, Egypt, Libya, Turkey, Greece, Italy, the United States of America, Japan, the USSR and Czechoslovakia.

[8] However, it is usually and solely collected from cultivated soils, including the ones that bear cotton, potatoes, sugar canes, legumes, paddy and Artemisia herba-alba.

[8] A. clavatus has also been detected in the ripe compost of municipal waste, and Nitrogen and NPK fertilizers are found to play an important role in its stimulation process.

[7] A. clavatus with Phytophthora cryptogea in soil provided protection against damping of tomato seedlings, by decreasing the spreading of pathogens.

It is described as a true hypersensitivity pneumonia, which usually occurs among malt workers, including symptoms of fever, chills, cough and dyspnea.

[17] Microgranulomatous hypersensitivity pneumonitis, where interstitial granulomatous infiltration occurs, usually in malt workers, is caused by allergy to antigens of Aspergillus clavatus.

[7] Spore walls of a sputum-derived isolate of Aspergillus clavatus were extracted and treated with ethanol following alkaline hydrolysis.

[20] This study revealed that an isolate of A. clavatus, which is able to convert highly toxic metabolites in bacterial and mammalian cells, will cause inflammatory response in the lungs of unimmunized mice.