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Very few shells wash up on this beach, and the ones that do are generally very solid. I guess they have to be to live on such an exposed beach in pebbles.
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Trough shells, found washed up on the beach.
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Trough shells, found washed up on the beach.
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Trough shells, found washed up on the beach.
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These frquently appear in numbers on Tomatea Point and it seems they live quite locally on the small mudflat area between here and the outlet to the Pakawau inlet deeply buried in their favourite substrate. Easily confused with S murchisoni but shells whiter once periostracum is lost.
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These frquently appear in numbers on Tomatea Point and it seems they live quite locally on the small mudflat area between here and the outlet to the Pakawau inlet deeply buried in their favourite substrate. Easily confused with S murchisoni but shells whiter once periostracum is lost.
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Deep Trough Shell
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Deep Trough Shell
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A couple of shells in fair condition, and a couple of worn ones. With a few mud snails, and a few cockles. And one crab.
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A couple of shells in fair condition, and a couple of worn ones. With a few mud snails, and a few cockles. And one crab.
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A pair of shells in good condition. 64 x 53 x 28 for pair
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Dead on a muddy estaurine beach.
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Dead on a muddy estaurine beach.
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Part of the disbanded Cawthron Institute collection. Collected in the 1940's or earlier. The label reads 'Mactra ovata tristis'. Location: ' Estuary of Avon and Heathcote Rivers, New Brighton, Christchurch ' This subspecies has subsequently been given species status. Currently unsure what makes this differ from C ovata ss. as they are quite similar. It does seem to be rounder than C ovata.
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