Carelia bicolor (Jay) 

Two-colored Carelia Snail (Carelia bicolor)

The Two-colored Carelia Snail was described in 1839; the species was restricted to an area in the Hanakāpī’ai Valley in the northern north-west of Kaua’i, Hawaiian Islands.

The shells of this species reach heights of nearly 4 cm; they are quite variably colored and patterned; some of the color forms were originally described as distinct varieties or subspecies.

The species disappeared sometimes after the 1930s.

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syn. Carelia bicolor ssp. adusta Gould, Carelia bicolor ssp. fuliginea Pfeiffer, Carelia bicolor ssp. hyperleuca Pilsbry

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’  

(public domain)  

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References:  

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
[2] C. Montague Cooke Jr.: The land snail genus Carelia. Bishop Museum Bulletin 85: 1-97. 1931

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edited: 24.01.2024