Powelliphanta lignaria, known as one of the amber snails, is a species of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae. The eggs of P. lignaria are oval and seldom constant in dimensions 10 × 8.25, 9 × 7.75, 9 × 8, 8.75 × 7.75 mm.[2]
P. lignaria is endemic to the west coast of the South Island of New Zealand. There are seven subspecies,[3] all of which are listed by the New Zealand Department of Conservation as threatened:[4]
^ abMollusc Specialist Group (1996). "Paryphanta lignaria". IUCN Red List of Threatened Species. 1996: e.T16404A5721715. doi:10.2305/IUCN.UK.1996.RLTS.T16404A5721715.en.
^A. C. O'Connor (1945). "Notes on the eggs of New Zealand Paryphantidae, with description of a new subgenus". Transactions of the Royal Society of New Zealand. 5: 54–57.
^Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd., Auckland, New Zealand 1979 ISBN 0-00-216906-1
^"New Zealand Threat Classification System lists - 2002 - Terrestrial invertebrate - part one". New Zealand Department of Conservation. 2002. Archived from the original on October 15, 2008. Retrieved March 3, 2010.
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