In addition, in the cmd gene region examined, P. simile sp.
nov. and P. raistrickii appear as two distinct species, as the
statistical data clearly indicate (Supplementary Fig. S2); their
cmd gene sequence similarity is 92.3%, a value that is lower
than those reported for closely related species of the genus
Penicillium (Wang & Zhuang, 2007; Peterson & Horn,
2009). Moreover, some transitions found in the cmd regions
of P. raistrickii appear to be apomorphic substitutions, while
P. simile, P. scabrosum and other related species of the genus
Penicillium retained the plesiomorphic sequences of the
gene.