Volume 83, 1955-56
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Key to New Zealand Families of Hyperiidea
(Adapted from Barnard, 1940)
| 1. Antenna 1 straight, 1st segment of flagellum large, the rest inserted terminally; ant. 2 straight in both sexes | 2 | |
| Antenna 1 curved, 1st segment of flagellum large, the rest inserted subterminally; ant. 2 in male angularly folded (in Lycacopsidae rudimentary in male, absent in female) | 7 | |
| 2. Antenna 1 flagellum with few segments | 3 | |
| Antenna 1 flagellum in male with many segments, filiform; in female very small, rudimentary or absent | 5 | |
| 3. Head large, swollen, mandible without palp | Paraphronimidae | |
| Head not swollen | 4 | |
| 4. Antenna 1 flagellum elongate, styliform; mandible without palp; inner rami of uropods fused with peduncles; outer rami rudimentary in uropods 1 and 2, small in uropod 3 | Scinidae | |
| Antenna 1 flagellum short, laminar, oval or lanceolate (terete in Cyllopus); mandible with palp; all rami of uropods well-developed, the inner rami not fused with the peduncles | Vibiliidae | |
| 5. Uropods foliaceous, without rami; last peraeopod reduced | Phrosinidae | |
| Uropods normal, with rami; last peraeopod normal | 6 | |
| 6. Mandible with palp | Hyperiidae | |
| Mandible without palp | Phronimidae | |
| 7. Peraeopod 4, 2nd segment not operculiform, the following segments articulated terminally | 8 | |
| Peraeopod 4, 2nd segment operculiform, the following segments articulated subterminally | 11 | |
| 8. Antenna 1 attached to anterior surface of head; peraeopod 3 very slender; peraeopod 4 robust | Lycaeopsidae | |
| Antenna 1 attached to inferior surface of head | 9 | |
| 9. Head not (or very slightly) produced in a rostral point | 10 | |
| Head more or less produced in a rostral point | Oxycephalidae | |
| 10. Gnathopods 1 and 2 simple | Lycaeidae | |
| Gnathopods 1 and 2 prehensile, the expanded 5th segment forming a chela with the dactylos | Brachyscelidae | |
| 11. Peraeopod 3, second segment normal | Pronoidae | |
| Peraeopod 3, second segment operculiform | 12 | |
| 12. Peraeopod 5 normal | Scelidae | |
| Peraeopod 5 rudimentary | Platyscelidae |
Note.—In this paper, I have reckoned gnathopods 1 and 2 and peraeopods 1 to 5, as is usual with Gammaridae, and now common in many Hyperiid papers. It replaces the older custom of reckoning peraeopods 1 to 7.