Carelia pilsbryi Sykes

Pilsbry’s Carelia (Carelia pislbryi)

This species was described in the year 1909 on the basis of subfossil shells, which had been found on the Kaakaaniu- and the Kalihikai beaches on the island of Kaua’i.

The shells reached a height of up to 8,5 cm.

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Pilsby’s Carelia obviously inhabited lowland regions, and thus was one of the first species that felt victim to the Polynesian Rats (Rattus exulans (Peale)), which had been introduced by the Polynesian settlers.

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Another subspecies, the Tsunami Carelia (Carelia pilsbryi ssp. tsunami Cooke & Kondo), was described in the year 1952 from numerous subfossil shells, which had been uncovered at April 1, 1946 by far-ranging tidal waves on the Lepeuli beach on the island of Kaua’i, but of which, however, not a single one was intact.

This form differs from the nominate race, among other things, by its more compact embryonic whorls, and by its spiral striation pattern.

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References:

[1] C. Montague Cooke, Jr.; Yoshio Kondo: New fossil forms of Carelia and Partulina (Pulmonata) from Hawaiian Islands. Bishop Museum Occasional Papers 20(20): 329-346. 1952

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carelia-p-pilsbryi-mc

nominate race

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

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