Hirasea biconcava Pilsbry

Concave Hirasea Snail (Hirasea biconcava 

This species was described in 1907, it was restricted to the island of Hahajima in the Ogasawara Islands, Japan.  

The shells reach a height of about 0,2 cm and are about 0,4 cm in diameter.  


This species is also treated as subspecies of the Plane Hirasea Snail (Hirasea planulata Pilsbry & Hirase) . 


Depiction from: ‘The Conchological Magazine 1907’  

(public domain)


edited: 11.05.2019