The strange reproductive habits of a large, carnivorous New Zealand snail were once shrouded in mystery, but footage of the snail laying an egg from its neck has been captured for the first time, the country’s conservation agency said yesterday.
What looks like a tiny hen’s egg is seen emerging from an opening below the head of the Powelliphanta augusta snail, a threatened species endemic to New Zealand.
The video was taken at a facility on the South Island’s West Coast, where conservation rangers attempting to save the species from extinction have cared for a population of the snails in chilled containers for nearly two decades.
Photo: Lisa Flanagan, New Zealand Department of Conservation via AP
The conditions in the containers mimic the alpine weather in their only former habitat — a remote mountain they were named for, on the West Coast of the South Island, that has been engulfed by mining.
New Zealand Department of Conservation ranger Lisa Flanagan, who has worked with the creatures for 12 years, said the species still holds surprises.
“It’s remarkable that in all the time we’ve spent caring for the snails, this is the first time we’ve seen one lay an egg,” she said in a statement.
Like other snails, P augusta are hermaphrodites, which explains how the creatures can reproduce when encased in a hard shell. The invertebrate uses a genital pore on the right side of its body, just below the head, to simultaneously exchange sperm with another snail, which is stored until each creates an egg.
Each snail takes eight years to reach sexual maturity, after which it lays about five eggs a year. The egg can take more than a year to hatch.
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