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Powelliphanta can live for 20 years or more, and are slow to mature, reaching sexual maturity around 5–6 years of age. [6] They are hermaphrodites , having both male and female sex organs. They lay 5 to 10 large (bean-sized) eggs a year, which have a thin pink calcium carbonate shell, like a tiny bird's egg. [ 8 ]
The numbers of this Powelliphanta species are estimated to be fewer than 500, and their existing habitat covers 3 to 4 hectares (7.4 to 9.9 acres). The Wildlife Permit granted allowed Solid Energy to mine 96% of this area. There was also concern over the destruction of Powelliphanta habitat by the mining company OMYA on Mount Burnett, in Golden ...
Powelliphanta annectens is one of the amber snails, an air-breathing land snail, a terrestrial gastropod mollusc in the family Rhytididae. It is a protected species with very limited distribution. It is a protected species with very limited distribution.
Powelliphanta patrickensis is a species of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae. This species is endemic to the South Island of New Zealand. Formerly, it was considered as a subspecies of Powelliphanta rossiana.
Powelliphanta superba is a species of large, carnivorous land snail in the family Rhytididae, which is endemic to the South Island of New Zealand. Five subspecies are recognised, [ 1 ] all of which are classified by the New Zealand Department of Conservation as being Nationally Endangered .
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 ]
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