Table 2. The number of species presenting AT- or GC-skewness in whole genome, whole PCGs, major strand, and minor strand PCGs in Polyneoptera.

Skewness	Categories
	Whole genome	Whole PCGs	Major strand	Minor strand
A- and C-skewed	59	0	32	0
T- and G-skewed	0	12	0	59
T- and C-skewed	0	45	27	0
T-skewed*	0	2	0	0

^*GC-skewness is zero.