SCINOIDEA, Bowman & Gruner, 1973

Zeidler, Wolfgang, 2012, A review of the hyperiidean amphipod families Mimonectidae and Proscinidae (Crustacea: Amphipoda: Hyperiidea: Scinoidea) 3533, Zootaxa 3533, pp. 1-74 : 6-7

Key to the families of the superfamily SCINOIDEA ( Proscinidae excluded)

1. Pereopod 5 distinctly longer than P4, partly folded; basis usually with serrate margins; dactyl never retractile. Uropoda all with inner ramus fused with peduncle. Inner lobes of maxilliped fused, often reduced, sometimes absent............. SCINIDAE

- Pereopod 5 only marginally longer or shorter than P4, not folded; if longer than P4 then dactyl retractile; basis with smooth margins. Uropoda with free, articulated rami. Inner lobes of maxilliped well developed and separate, or only partly fused near the base............................................................................................. 2

2. Pereopods, all with normal dactyls......................................................... MIMONECTIDAE

- Pereopods 5–7, rarely 3–7, with retractile dactyls and spoon-shaped distal structure................................. 3

3. Pereopods 5–7 with retractile dactyls. Pereonites all separate. Head without rostrum, or with indistinct, small rostrum..................................................................................... MIMOSCINIDAE fam. nov.

- Pereopods 3–7 with retractile dactyls. Pereonites 1–2 fused. Head with distinct rostrum....... MICROSCINIDAE fam. nov.