| 11. | The arms are subequal with biserial suckers.
|
| 12. | Two pairs of subequal chin shields, the anterior in contact with three lower labials.
|
| 13. | The perianth consists of three subequal, membranous tepals that are loosely connate at base.
|
| 14. | Two pairs of chin shields, the anterior pair and the posterior pair subequal in size.
|
| 15. | The corolla is two-lipped with four subequal lobes, the upper lobe usually the largest.
|
| 16. | The subequal jaws are anteriorly lined with rows of numerous close-set, depressible, and retrorse barbel.
|
| 17. | The mandibles subequal, pointed; the upper slightly curved, with the tip pale fuscous; gape medium.
|
| 18. | Two pairs of chin shields, subequal in size, the anterior chin shield in contact with four lower labials.
|
| 19. | Larvae also have well developed legs, and the ligula is subequal to the length of the first palpal segment.
|
| 20. | Shells are subdiscoidal to globose with variable umbilici and sutures with 10 to 30 lobes, which tend to be subequal.
|
