We present a genome assembly from an individual male Apotomis turbidana (the White-shouldered Marble; Arthropoda; Insecta; Lepidoptera; Tortricidae). The genome sequence is 720.5 megabases in span. Most of the assembly is scaffolded into 28 chromosomal pseudomolecules, including the assembled Z sex chromosome. The mitochondrial genome has also been assembled and is 16.8 kilobases in length. Gene annotation of this assembly on Ensembl identified 22,646 protein coding genes.