FIG. 1.

Clustering of basidiomycete sequences isolated from the Kellogg Biological Station Long-Term Ecological Research site in June and October 2002 with known GenBank sequences (open circles) and among themselves (solid circles). Clustering is based on genetic distance of 650 bases from the 5′ end of the nLSU ribosomal DNA region using the F84 model of DNA evolution and is calculated using the complete linkage (furthest-neighbor assignment) algorithm in the DOTUR computer package (51); “species” are defined as clusters differing by more than the genetic distance indicated at each point on the curves. The area between the two curves indicates diversity not represented in GenBank.