Endodonta binaria (Pfeiffer)

Binary Disc Snail (Endodonta binaria)  

The Binary Disc Snail, which was described in 1856, was endemic to the island of Kaua’i, Hawaiian Islands.  The shells on average reached a size of 0,43 cm in diameter. [1]  

***

This species is now most likely extinct, like nearly all of its congeners. [2]  

*********************  

References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Norine W. Yeung; Kenneth A. Hayes: Update on the status of the remaining Hawaiian land snail species Part 4: Punctidae and Endodontidae. 2016  

*********************   

Depiction from: ‘G. W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’

(not in copyright)  

*********************  

edited: 23.03.2017