| 1. | Eyestalks short, cylindrical rather than tapering proximally. |
| 2. | Rostrum extends beyond eyes (except in late larvae of Alope), without spines. |
| 3. | Maxillule with outer plumose seta and with distal lobe of endopod bearing three setae (Fig. 3J). |
| 4. | Exopod of maxilla in mid- and late larvae with proximal extension, and with distal margin almost straight rather than smoothly rounded, always with setae on outer proximal margin (Fig. 3K). |
| 5. | Maxillipeds 2 and 3 with flexible rather than spiniform setae (e.g. Fig. 3I, cf. Fig 4E). |
| 6. | Both pereiopods 1 and 2 with a well formed chela in late larvae. |
| 7. | Antennules not separated at base by more than width of one of them (Fig. 3D). |
| 8. | Antennal exopod distally segmented in early larvae (Fig. 3E). |
| 9. | Never more than 8+8 telsonic setae. |
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