Brinker S., Evankow A.M. & Timdal E.
Rhizoplaca ouimetensis sp. nov. (Lecanoraceae) from Ontario, the first sorediate species in the genus
Rhizoplaca ouimetensis is described new to science, growing on outcrops of diabase sills in the
Lake Superior region of Ontario, Canada. It is the first known sorediate species of the genus, and a
phylogenetic reconstruction based on the ITS and mtSSU markers place it in the R. chrysoleuca group.
Morphologically, however, it resembles sorediate, yellow-green species of Lecanora with usnic acid, e.g.,
L. handelii and L. soralifera, but differs from those in forming larger, often pulvinate or minutely …