Powelliphanta spedeni, known as one of the amber snails, is a species of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae.
Distribution This species is endemic to the South Island of New Zealand. There are two subspecies:Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979
Powelliphanta spedeni spedeni Powell, 1932 Powelliphanta spedeni lateumbilicata Powell, 1946
Description The shell of Powelliphanta spedeni reaches a maximum size of 40 mm.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 75, 1945-46, pages 54-57.
Life cycle Powelliphanta spedeni produces an egg up to the size of 11.5 mm. Shape of the eggs is oval and seldom constant in dimensions 11.5 × 9 mm, 11 × 9 mm, 9 × 7.75 mm. Its eggs are laid in March.
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