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Description: | Specimen of a fossil gastropod (snail), a Portland Screw, Aptyxiella portlandica, collected from the Portland Stone of Late Jurassic, Tithonian age from Dorset (SW England).
This specimen is a limestone cast of the inside of a sea snail shell. The original shell formed the mould and was later dissolved away by weakly acidic water. The cast shows that the inside of the shell was very smooth. The slender shape, appearance and the locality where it was found have led the fossil being commonly known as a Portland Screw. The gastropod lived in shallow coastal waters of a warm subtropical sea.
The specimen was found in Dorset.
It is from the Jurassic period (206 - 144 million years ago) | Publisher: | Tyne & Wear Archives & Museums | Subjects: | Gastropoda Classification: Animalia Invertebrata Mollusca | Temporal: | Jurassic period (206 - 144 million years ago) | Source: | Tyne & Wear Archives & Museums | Identifier: | http://www.twmuseums.org.uk/geofinder/se... | Go to resource |
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