Lyropupa rhabdota ssp. rhabdota Cooke & Pilsbry

Striped Lyropupa Snail (Lyropupa rhabdota ssp. rhabdota)

The Striped Lyropupa Snail was described in 1920; it was endemic to the island of Moloka’i, Hawaiian Islands where it probably was very widespread but apparently not common.:

There can be no doubt that this species is distributed over the whole of the wooded portion of Molokai. Unfortunately it has never been found in any number in any one locality and in none of the lots are there more than half a dozen specimens – in most of them only 1 to 3.” [1]

The shells reach sizes of about 0.27 cm in length. “This species is, at first glance, very similar to some of the forms of lyrata from Oahu. It is easily separated by the different sculpture of the embryonic whorls and the longer lower palatal fold.” [1]

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According to a study from the year 2018, all Hawaiian species of this genus are now sadly extinct. [2]

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920’

(public domain)

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References:   

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second Series: Vol.25, Pupillidae (Gastrocoptinae, Vertigininae) 1918-1920
[2] Norine W. Yeung; Kenneth A. Hayes: Biodiversity and extinction of Hawaiian land snails: how many are left now and what must we do to conserve them – a reply to. Integrative and Comparative Biology 58(6): 1157-1169. 2018

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edited: 25.02.2024