Achatinella spaldingi
| Achatinella spaldingi | ||||||||||||
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| Scientific name | ||||||||||||
| Achatinella spaldingi | ||||||||||||
| Pilsbry & Cooke , 1914 |
Achatinella spaldingi is an extinct species of snail from the on the island of O'ahu endemic terrestrial snails genus Achatinella .
description
Achatinella spaldingi reached a case length of 16.5 mm and a case diameter of 11.1 mm. The mouth was 9.2 mm long. There were 5½ turns. The case was left-wound, imperforate, egg-shaped, conical, bulbous, and quite thin. The color of the case was white with slightly broken or dotted light brown bands and lines, the second band of which ran above the edge area. Usually a number of ribbons were placed near the spindle and there was a space with no ribbons at and below the edge area. The seam was outlined with a white line. The top was a little dark. The surface was not very shiny and somewhat roughened with growth folds and irregularly scattered impressions. In older cases it was often blunt. The arched turns were connected by an indented seam. The mouth was white. The thin outer lip was pointed and not enlarged. The white spindle fold was small and twisted.
Occurrence
According to its discoverer Irwin Spalding was achatinella spaldingi to the field of Pukuloa in the Waianae Mountain Range on O'ahu limited.
die out
Achatinella spaldingi was last detected around 1938. Presumably, the species disappeared through overcrowding and deforestation.
literature
- Henry A. Pilsbry and C. Montague Cooke: Manual of Conchology. Structural and Systematic. Volume XXII. Achatinellidae . Conchological Department, Philadelphia, 1912-1914
Web links
- Achatinella spaldingi in the Red List of Threatened Species of the IUCN 2007. Posted by: Mollusc Specialist Group, 1996. Accessed July 19 of 2008.