Fig. 1From: Singleton molecular species delimitation based on COI-5P barcode sequences revealed high cryptic/undescribed diversity for Chinese katydids (Orthoptera: Tettigoniidae)Maximum intraspecific variation (K2P) against record count (a) and maximum geographic extent (b) of sampled individuals. a linear regression, y = 0.0007x + 0.0174, Adjusted R-square = 0.142, P < 0.001; b linear regression, y = 2E-05x + 0.0131, Adjusted R-square = 0.080, P < 0.001Back to article page