Powelliphanta traversi

Powelliphanta traversi
Powelliphanta traversi otakia in Te Papa
Conservation status
Data Deficient  (IUCN 2.3) [1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	Pulmonata
Family:	Rhytididae
Genus:	Powelliphanta
Species:	P. traversi
Binomial name
Powelliphanta traversi Powell, 1930

Powelliphanta traversi traversi at Lake Papaitonga

Powelliphanta traversi, known as Travers' land snail,^[1] is a species of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae. This species is endemic to the North Island of New Zealand between Wellington and Lake Waikaremoana.

Powelliphanta traversi traversi at Te Papa

Shells of P. traversi that have been predated by brushtail possums

There are six subspecies,^[2] all of which are listed by the New Zealand Department of Conservation as threatened:^[3]

• Powelliphanta traversi florida Powell, 1946 – Nationally Endangered
• Powelliphanta traversi latizona Powell, 1949 – Nationally Endangered
• Powelliphanta traversi koputaroa Powell, 1946 – Nationally Endangered
• Powelliphanta traversi otakia Powell, 1946 – Nationally Critical
• Powelliphanta traversi tararuaensis Powell, 1938 – Nationally Endangered
• Powelliphanta traversi traversi Powell, 1930 – Nationally Endangered

The eggs are oval and seldom constant in dimensions 10 × 8.75 mm, 9.5 × 8.5 mm, 10 × 8 mm, 11 × 9 mm, 10.75 × 9 mm.^[4]

See also

• List of non-marine molluscs of New Zealand

References

1. Mollusc Specialist Group (1996). "Paryphanta traversi". IUCN Red List of Threatened Species. Version 2009.2. International Union for Conservation of Nature. Retrieved March 4, 2010.
2. Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd., Auckland, New Zealand 1979 ISBN 0-00-216906-1
3. "New Zealand Threat Classification System lists - 2002 - Terrestial (sic) invertebrate - part one". New Zealand Department of Conservation. 2002. Retrieved March 3, 2010.
4. O'Connor A. C. (June) 1945. Notes on the Eggs of New Zealand Paryphantidae, With Description of a New Subgenus. Transactions of the Royal Society of New Zealand, volume 5, 1945-46, pages 54-57.