Ability to roll into a ball | Head, antennae, number of flagella | Head, eyes, number of ocelli per side of the head | Pereon - pleon junction | Pereon, texture of dorsal surface | Pleon, outer pair of uropods, shape | Pleon, ventral view, number of lungs

Check boxes for all that apply. If uncertain, skip character or select several states. Then click on any search button.
Navigate with above index or scroll bar.
Number scored for a state is in green.

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1. Pleon, outer pair of uropods, shape

2Flat, similar length and width	12Long, tapering to a point

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2. Head, antennae, number of flagella

3One, may appear to be more under high magnification	5Three	7Two

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3. Pereon - pleon junction    [Explain]

6A step between them, not aligned	9Smooth, continuous line

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4. Head, eyes, number of ocelli per side of the head    [Explain]

12Numerous	2One	1Three

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5. Pereon, texture of dorsal surface

2Longitudinal ridges on pereonites    4Rows of small bumps or spines, transverse or latitudinal across pereonites    12Smooth

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6. Pleon, ventral view, number of lungs    [Explain]

2Five pairs	5Two pairs	14Zero - or unknown due to their loss when in alcohol - note that sometimes it is still possible to detect the lungs in alcohol specimens

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7. Ability to roll into a ball

3Able to roll up	14Unable to roll up - all specimens included here, in case rolling up has not been observed

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