Talaromyces tenuis B.D. Sun, A.J. Chen, Houbraken & Samson

Conidiophores monoverticillate or biverticillate, with hyaline, thin stipes, colonies grow restrictedly on CYA, YES, DG18, slightly faster on MEA and OA, no growth on CYAS and CREA at 25 °C and CYA incubated at 37 °C.

Phylogenetic analysis places Talaromyces section Tenues sister to sections Talaromyces and Helici (Fig. 1); however, statistical support for this relationship is lacking. Using a nine-gene sequence data set, Houbraken et al. (2020) confidently shows that Talaromyces sp. CBS 141840 (= T. tenuis, the sole representative of the section) is sister to sect. Purpurei and Trachyspermi. section Trachyspermi species produce abundant red pigments (Yilmaz et al. 2014), while Talaromyces tenuis does not. section Purpurei species generally grow rapidly on CYA and MEA, and usually produce synnemata after two to three weeks of incubation (Yilmaz et al. 2014).

Named after the type species of the section, Talaromyces tenuis.