Moorean and Tahitian Partula tree snail survival after a mass extinction: New genomic insights using museum specimens.

•The utility and viability of NGS techniques for museum specimens is shown.•Phylogenomic relationships of three Society Island Partula survivors are presented.•46 versus 10-year-old museum specimens had similar sequencing quality.•Tahitian P. clara and P. hyalina result from a single Moorean founding lineage.•The taxonomic status of the enigmatic P. c. incrassa is clarified.