Banded Partula or similar tree snail / land snail
Phylum: Mollusca, Class: Gastropoda, Order: Stylommatophora, Family: Partulidae, Genus: Partula, Species: Partula otaheitana · Partulidae (Polynesian tree snail family) · Gastropod (land snail / univalve), whole shell, spiral shape
Species
Partula otaheitana or related Partula species
Shell Type
Gastropod (land snail / univalve), whole shell, spiral shape
Family
Partulidae (Polynesian tree snail family)
Size
Approximately 15 to 20 mm in length, which is average for adult Polynesian tree snails of this genus.
Color & Pattern
Smooth, glossy surface with a warm tan or cream base color featuring characteristic dark brown spiral banding around the body whorl and spire.
Rarity
Uncommon to Rare, especially given that many native Hawaiian and Pacific island land snail species are heavily protected, critically endangered, or extinct in the wild.
Habitat
Terrestrial environment, typically found climbing on the leaves and trunks of trees and shrubs in tropical island forests.
Geographic Range
Endemic to the high islands of Polynesia, with specific species found throughout the Hawaiian islands and Society Islands.
Description
A graceful, elongated oval spiral shell with a tapering spire, smooth whorls, and a polished porcelain-like finish. The warm caramel bands wrap neatly around the body whorl, creating a striking contrast against the lighter background.
Key Features
Smooth, glossy texture, distinctive dark brown spiral banding, ovate aperture, and dextral or sinistral coiling typical of land pulmonate snails.
Collector Value
High historical and scientific interest, though commercial trade of endangered land snails is strictly regulated or prohibited to protect remaining populations.
Condition Notes
The shell appears to be in good to fine overall condition with intact apex and body whorl, retaining natural coloration and polish.
Interesting Facts
Polynesian tree snails of the family Partulidae are famous in evolutionary biology for their incredible diversity and adaptive radiation on isolated Pacific islands, though many species have faced catastrophic declines due to introduced predatory snails.
Ecological Role
Acts as a herbivore and detritivore in island forest ecosystems, grazing on fungi, algae, and epiphytic growths on tree bark, contributing to nutrient cycling.
Similar Species
Other members of the family Partulidae or Achatinellidae (such as Hawaiian tree snails, Achatinella), distinguished by specific whorl counts, apertural barriers, and native island ranges.
Beach Finding Tips
As a land snail, this is typically found while examining leaf litter, tree trunks, or native vegetation in forested upland areas rather than beachcombing.
Notes
Oahu