Powelliphanta "Lodestone": Difference between revisions
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'''''Powelliphanta Sp.Lodestone''''' is a very rare undescribed large [[Terrestrial animal|terrestrial]] [[mollusc]] in the [[family (biology)|family]] [[Rhytididae]], [[endemic (ecology)|endemic]] to the [[South Island]] of [[New Zealand]]. It is found only on the [[Arthur Range, New Zealand|Arthur Range]] in the [[Kahurangi National Park]]. |
'''''Powelliphanta Sp.Lodestone''''' is a very rare undescribed large [[Terrestrial animal|terrestrial]] [[mollusc]] in the [[family (biology)|family]] [[Rhytididae]], [[endemic (ecology)|endemic]] to the [[South Island]] of [[New Zealand]]. It is found only on the [[Arthur Range, New Zealand|Arthur Range]] in the [[Kahurangi National Park]]. |
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Its habitat is under litter and under the skirts of prickly shield fern, ''Astelia norvosa'', and red tussock, around the treeline at altitudes of between 1,100 and 1,400 [[metre|m]] above sea level. |
Its habitat is under litter and under the skirts of prickly shield fern, ''Astelia norvosa'', and red tussock, around the treeline at altitudes of between 1,100 and 1,400 [[metre|m]] above sea level. |
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This species is apparently confined to calcium-rich soils on a marble substrate. |
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The shell has a very low [[spire (mollusc)|spire]] and a rather flattened appearance. The [[dorsum (biology)|dorsal]] surface is [[sculpture (mollusc)|sculpture]]d with minute spirals, giving it a matt appearance, while the ventral surface is smooth and glossy. The background colour of the shell is a khaki-yellow, but this is overlain with numerous dark purplish-brown axial stripes. The |
The shell has a very low [[spire (mollusc)|spire]] and a rather flattened appearance. The [[dorsum (biology)|dorsal]] surface is [[sculpture (mollusc)|sculpture]]d with minute spirals, giving it a matt appearance, while the ventral surface is smooth and glossy. The background colour of the shell is a khaki-yellow, but this is overlain with numerous dark purplish-brown axial stripes. The parietal callus]] is smooth and dark brown. |
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''Powelliphanta Sp.Lodestone'' is at risk of predation by [[Thrush]]es and [[Hedgehog]]s should the moist deep litter layer be reduced and dried out by the actions of an array of introduced [[mammal]]ian pests. |
''Powelliphanta Sp.Lodestone'' is at risk of predation by [[Thrush]]es and [[Hedgehog]]s should the moist deep litter layer be reduced and dried out by the actions of an array of introduced [[mammal]]ian pests. |
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* [http://www.doc.govt.nz/upload/documents/science-and-technical/tsrp49b.pdf Department of Conservation Recovery Plans] |
* [http://www.doc.govt.nz/upload/documents/science-and-technical/tsrp49b.pdf Department of Conservation Recovery Plans] |
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* [http://www.doc.govt.nz/templates/MultipageDocumentPage.aspx?id=39593 New Zealand Department of Conservation Threatened Species Classification] |
* [http://www.doc.govt.nz/templates/MultipageDocumentPage.aspx?id=39593 New Zealand Department of Conservation Threatened Species Classification] |
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[[Category:Molluscs of New Zealand]] |
[[Category:Molluscs of New Zealand]] |
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[[Category:Gastropods]] |
[[Category:Gastropods]] |
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Revision as of 06:20, 18 August 2007
| Powelliphanta Sp.Lodestone | |
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| A Powelliphanta of unknown species. | |
| Scientific classification | |
| Kingdom: | |
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| Species: | P. Sp.Lodestone
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| Binomial name | |
| Powelliphanta Sp.Lodestone not yet described
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Powelliphanta Sp.Lodestone is a very rare undescribed large terrestrial mollusc in the family Rhytididae, endemic to the South Island of New Zealand. It is found only on the Arthur Range in the Kahurangi National Park.
Its habitat is under litter and under the skirts of prickly shield fern, Astelia norvosa, and red tussock, around the treeline at altitudes of between 1,100 and 1,400 m above sea level. This species is apparently confined to calcium-rich soils on a marble substrate.
The shell has a very low spire and a rather flattened appearance. The dorsal surface is sculptured with minute spirals, giving it a matt appearance, while the ventral surface is smooth and glossy. The background colour of the shell is a khaki-yellow, but this is overlain with numerous dark purplish-brown axial stripes. The parietal callus is smooth and dark brown.
Powelliphanta Sp.Lodestone is at risk of predation by Thrushes and Hedgehogs should the moist deep litter layer be reduced and dried out by the actions of an array of introduced mammalian pests.
Major diameter is up to 41 mm, and height up to 18 mm.
Powelliphanta Sp.Lodestone is classified by the New Zealand Department of Conservation as Range Restricted.
References
- Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
- Department of Conservation Recovery Plans
- New Zealand Department of Conservation Threatened Species Classification