Achatinella caesia (Gulick)
|Grey Blue Oahu Tree-Snail
Hawai'i Islands: O'ahu
Pupu kani oe (Hawaiian)
Pupu kuahiwi (Hawaiian)
|size: ca. 2 cm
extinction date: last seen ca. 1900
|The Grey Blue Oahu
Tree-Snail is split into five (invalid) subspecies, Achatinella caesia ssp. caesia (Gulick), Achatinella
caesia ssp. cervina (Gulick), Achatinella caesia ssp. cognata (Gulick),
Achatinella caesia ssp. concidens (Gulick) as well as Achatinella caesia ssp.
littoralis (Pilsbry & Cooke).
The species died out already at the beginning of the 20th century - the destruction of its habitat, but also excessive collecting of living specimens by shell collectors are the reasons therefor.
Grey Blue Oahu Tree-Snail (Achatinella caesia)
Photo from: 'G. W. Tryon; H. A. Pilsbry: Manual of Conchology. Second series: Pulmonata, Vol. 22, 1912-1914'