A new genus to accommodate Gymnopus acervatus (Agaricales)
Phylogenies based on ITS and LSU nrDNA sequences show Agaricus (Gymnopus) acervatus as unique within the Gymnopus/Rhodocollybia complex. These phylogenies imply that a separate genus is necessary, and Connopus is proposed. Infraspecific morphological and DNA-based variation within C. acervatus suggests that a western North American clade might be reproductively isolated from the eastern North American/Scandinavian clade and that in this species complex the European and eastern North American clade might be conspecific. A Scandinavian exemplar is selected for bar-coding. Two GenBank sequences with name-phylogenetic placement inconsistencies are identified.
Karen Hughes, David A. Mather, and Ronald H. Peterson. "A new genus to accommodate Gymnopus acervatus (Agaricales)" Mycologia 102.6 (2010): 1463-1478.
Available at: http://works.bepress.com/karen_hughes/4