The genome sequence of the common adder, <i>Vipera berus</i> (Linnaeus, 1758)

We present a genome assembly from an individual female <i>Vipera berus</i> (common adder; Chordata; Lepidosauria; Squamata; Viperidae). The haplotype-resolved assembly contains two haplotypes with total lengths of 1,695.0 megabases and 1,476.7 megabases, respectively. Most of haplotype 1 (98.45%) is scaffolded into 19 chromosomal pseudomolecules, while haplotype 2 is assembled to scaffold level. Haplotype 1 achieves the Earth Biogenome Project reference standard of 6.C.Q52. The mitochondrial genome has also been assembled and is 17.35 kilobases in length.