Colonies on CYA are limited-growing, on the 7th day 0.7-1 cm in diameter, somewhat furrowed, with white mycelium, velvety, abundantly sporiferous in dull green tones. The reverse of the colonies is yellowish to brown-orange.
At 37 ° C, colonies on the 7th day were 0.5-0.8 cm.
On malt extract agar (MEA), the colonies are moderately growing, on the 7th day 2.5-3.5 cm in diameter, with white mycelium, velvety to woolly. Sporulation is plentiful, dull green. Sometimes small fast-colored droplets of exudate stand out. The reverse is brownish yellow.
On agar with yeast extract and sucrose (YES), colonies on the 7th day were 0.8-1 cm in diameter, with white mycelium, velvety to slightly woolly. Sporulation of varying intensity, in dull green tones. Soluble pigment does not stand out, the reverse is light yellow.
Conidiophores are two-tiered brushes, sometimes with additional branches, with a smooth-walled pedicle 200-300 microns long and 2.5-4 microns thick. Metules in the final whorl of 3-8, diverging, 7-14 microns in length. Needle -shaped phialides, 3–6 in a bundle, 8–12 × 2-3 microns. Conidia are ellipsoidal to almost spherical, smooth-walled, 2-5 × 2-3.5 microns.
Differences from close species
It is determined by slow and weak growth on CYA and rapid growth and the formation of velvety colonies on MEA. Creatine Sucrose Agar (CREA) does not grow. From Talaromyces rademirici , Talaromyces erythromellis and Talaromyces primulinus it is distinguished by its ability to grow at 37 ° C and rather rapid growth on MEA.
Talaromyces diversus ( Raper & Fennell ) Samson , Yilmaz , Frisvad & Seifert , 70: 175 (2011). - Penicillium diversum Raper & Fennell , Mycologia 40 (5): 539 (1948).