| 1. Shell top pattern |
| 7Reticulated | 1Rings | 25Solid | 11Spotted | 17Striped |
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| 2. Head and neck pattern |
| 10Mottled | 6Solid | 18Spots | 23Stripes |
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| 3. Head pattern color |
| 7Orange 2Red 23Yellow 18Other |
| 4. Shell bottom scute number |
| 41-9 | 810 | 711 | 2412 | 5Over 12 |
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| 5. Shell top vertebral keel |
| 34Absent | 2Knobbed or spiny | 8Smooth |
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| 6. Shell top texture |
| 31Hard flat | 7Hard ridged | 3Leathery |
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