Table 2. Mean values and ranges of intraspecific sequence divergences (% difference, K2P distance) of COI MtDNA partial sequences of three North American species of Heptagenia for which more than one sequence was obtained.
| Species | Number of sequences | Mean variation (%) | Range (%) |
|---|---|---|---|
| H. flavescens | 4 | 0.7 | 0.0–1.1 |
| H. marginalis | 2 | 0.2 | 0.2 |
| H. whitingi | 3 | 0.9 | 0.3–1.1 |