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| Examining the highlighted area of your specimen, click on the image below which most closely resembles your specimen. |  |
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| Dorsal spinules close together, interspinule distance less than 1.5 times the spinule length | |||||||||||||
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| Dorsal spinules further apart, interspinule distance greater than 1.5 (usually 2-3) times the spinule length | |||||||||||||
| Taxonomy | |||||||||||||
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