LANCEOLOIDEA, Bowman & Gruner, 1973

Zeidler, Wolfgang, 2009, A review of the hyperiidean amphipod superfamily Lanceoloidea Bowman & Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea), Zootaxa 2000, pp. 1-117 : 9

Key to the families of the superfamily LANCEOLOIDEA

1. Pereopods 3 & 4 with retractile, hooded dactyls. Mandibles without palp in both sexes.................. CHUNEOLIDAE

- Pereopods 3 & 4 with normal dactyls, not retractile or hooded; or if dactyls retractile then pereopod articles very broad. Mandibles with palp in both sexes.....................................................................................................................2

2. Eyes consist of row of five individual ocelli on either side of head. Gnathopod 1 subchelate, with distally expanded carpus and propodus................................................................................................... PROLANCEOLIDAE fam. nov.

- Eyes compact or absent. Gnathopod 1 simple..............................................................................................................3

3. Pereopods 6 & 7 with retractile, often hooded, dactyls; or rarely with only proximal part of dactyl retractile. Antennae 2 much longer that A1; or if shorter or subequal in length to A1 then P5–7 with well-developed retractile, hooded dactyls..............................................................................................................................................................4

– Pereopods 6 & 7 with normal dactyls, not fully retractile or hooded. Antennae 2 shorter or subequal in length to A1.......................................................................................................................................................................................6

4. Spoon-shaped formation of P5–7 well-developed, swollen posterodistally. Antennae 1 longer than A2...................... ................................................................................................................................. METALANCEOLIDAE fam. nov.

- Spoon-shaped formation of P5–7, if developed, not swollen posterodistally. Antennae 1 much shorter than, or equal in length to A2..............................................................................................................................................................5

5. Mandibles with broad incisor, lacinia mobilis (on left) reduced to small tubercle, palp relatively slender. Coxae 3 & 4 elongate, with narrow anterior lobe. ............................................................................................... LANCEOLIDAE

- Mandibles with narrowed incisor, lacinia mobilis (on left) almost as broad as incisor, palp relatively massive. Coxae 3 & 4 trapezoid, about as deep as wide.................................................................. MEGALANCEOLIDAE fam. nov.

6. Head without rostrum. Antennae 2 reduced, much shorter than A1, with enlarged antennal gland............................... .................................................................................................................................................... MICROPHASMIDAE

- Head with short rostrum. Antennae 2 well-developed, subequal in length to A1, or only slightly shorter, antennal gland not enlarged .................................................................................................. MIMONECTEOLIDAE fam. nov.