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Showing results for tags 'banjaard'.
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From the album: The Mollusca of the Banjaard
A nice example of the freshwater clam. This is a freshwater species, and therefore does not come from the Eemian stage of the Late Pleistocene like most other Banjaard shells (this one might be around 400'000 years old, but it's not sure). Contrarily to the other specimen shown in this album, this shell's shape is much more similar to the extant Corbicula fluminalis, and could possibly be one (and, if the 'tear-drop shape' Corbicula is recognized as a new species, this one will probably be separate from it). Status: still locally alive (in freshwater bodies, not in the sea) Fossil occurrence: rather common© 2019 Max DEREME
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From the album: The Mollusca of the Banjaard
A great specimen of the freshwater clam. This is a freshwater species, and therefore does not come from the Eemian stage of the Late Pleistocene like most other Banjaard shells (this one might be around 400'000 years old, but it's not sure). This one has the typical "tear-drop" shape of the fossil Corbicula's found in Dutch Pleistocene. They are significantly higher, slightly bulkier and more robust than the modern Corbicula fluminalis. Scientists are still debating as to whether it should be a separate species or not. Status: still locally alive (in freshwater bodies, not in the sea) Fossil occurrence: rather common© 2019 Max DEREME
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From the album: The Mollusca of the Banjaard
An incomplete bittersweet clam specimen. Because the hinge is missing, it becomes very hard to determine which species it is, which also makes it difficult to determine the age of the specimen, as both Pliocene and Eemian (which contain different species) sediments occur on the Banjaard. Chances are higher that it's an Eemian species, simply because Eemian sediments are more common, but no definite conclusion can be drawn. Status: locally extinct Fossil occurrence: uncommon© 2019 Max DEREME
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