Genome Report: De novo genome assembly of the greater Bermuda land snail, Poecilozonites bermudensis (Mollusca:Gastropoda), confirms ancestral genome duplication

Poecilozonites bermudensis, the greater Bermuda land snail, is a critically endangered species and one of only two extant members of the genus Poecilozonites . The genus is one of Bermudas few endemic animal clades and its fossil record formed the basis for the punctuated equilibria model of speciation. Once thought extinct, recent conservation efforts have focused on the recovery of the species, yet no genomic information has been available to help inform these initiatives. We present a high-quality, annotated genome for P. bermudensis , generated using a combination of PacBio long read and Omni-C short read sequencing. The resulting assembly is approximately 1.36 Gb with a scaffold N50 of 44.t Mb and 31 chromosome-length scaffolds. Nearly 43 percent of the genome was identified as repeat content. This assembly will serve as a resource for the conservation and study of P. bermudensis , and its only close extant relative, P. circumfirmatus . Additionally, it adds to the growing body of genomic data needed for a more complete understanding of gastropod evolution and for evolutionary processes in general.