Maiden Rocksnail (Leptoxis formosa)
This species was described in 1860.
The Maiden Rocksnail was endemic to the Coosa River system in Alabama, USA, where it was restricted to the upper and middle reaches some of the tributaries.
The shells reached sizes of about 1,5 cm.
The species disappeared after the impoundment of the river by the building of dams and is now considered extinct.
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Natural History Museum Rotterdam
http://www.nmr-pics.nl
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edited: 04.11.2017