available type is known, could prevent this approach”. This
leads us to question the quality of the P. rubens type strain
NRRL-792. Unfortunately, NRRL-792 is a lectotype identified
from phenotypic characteristics from Biourge’s original illustrations
(Biourge 1923; Thom 1930; Raper & Thom 1949;
Houbraken et al. 2011). As we have seen from the problems
associated with morphological species identification (Taylor
et al. 2000), it cannot be assured that NRRL-792 is actually
the species first described by Biourge. His other closely related
species have all been synonymized with P. chrysogenum both