| Morphometric character | Ratio | Formula | ||
|---|---|---|---|---|
| Numerical counted characters are written in italics. | ||||
| CL | postorbital carapace length | |||
| RO | rostral length | rcl | relative rostral length | RO/CL |
| CT | length of part of the | ctcl | relative length of part | CT/CL |
| carapace with teeth | of the carapace with | |||
| behind the eyes | teeth behind the eyes | |||
| ROT1 | number of dorsal teeth on | r12rct | density of dorsal teeth | (ROT1 + ROT2) |
| rostrum in front of the eyes | on rostrum and | /(RO+CT) | ||
| ROT2 | number of teeth on carapace | carapace | ||
| behind the eyes | ||||
| ROT3 | number of ventral teeth on | r3r | density of ventral teeth | ROT3 /RO |
| rostrum | on rostrum | |||