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Examining the highlighted area of your specimen, click on the image to the right which most closely resembles your specimen.
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Teeth of middle (m) pecten are intermediate in size, larger than teeth of proximal (p) and distal (d) pecten; middle (m) pecten teeth not more than twice the length of the distal (d) pecten teeth |
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 Intermediate size pecten |
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Teeth of middle (m) pecten very stout, at least |
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Teeth of proximal (p), middle (m) and distal (d) pecten are small and approximately the same size | ||||||||||||
| Small size pecten |
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