Partula affinisPartula affinis is a species of partulid within the genus Partula. The species is rarely referred to as the similar partula, and is endemic to Tahiti.DistributionThis species' historical distribution represents almost all of Tahiti, but now its modern distribution includes only one population in Tahiti Iti, making it now considered a single valley endemic.Captive breedingPartula affinis is in the international Partula breeding program and the conservation efforts for this species have been very successful, allowing reintroductions since 2015.PhylogenyPhylogenetic analyses confirmed that P. affinis is the sister species of P. otaheitana.TaxonomyP. affinis was originally described as a subspecies of P. otaheitana but is now recognized as a distinct species.