The genome sequence of the Grey Tortrix moth, Cnephasia stephensiana (Doubleday, 1850) (Lepidoptera: Tortricidae)

We present a genome assembly from an individual male Cnephasia stephensiana (Grey Tortrix; Arthropoda; Insecta; Lepidoptera; Tortricidae). The assembly contains two haplotypes with total lengths of 465.14 megabases and 465.69 megabases. Most of haplotype 1 (99.5%) is scaffolded into 30 chromosomal pseudomolecules, including the Z sex chromosome. Haplotype 2 was assembled to scaffold level. The mitochondrial genome has also been assembled, with a length of 16.63 kilobases. This assembly was generated as part of the Darwin Tree of Life project, which produces reference genomes for eukaryotic species found in Britain and Ireland.