Length: 9.7mm. Head with one pair of dorsal spines. Pereonites 2 to 4 with three pairs of dorsal spines, and lateral spines over gnathopod and gills. Pereonite 5 with two pairs of dorsal spines. Antenna 1 as long as head to pereonite 5, inclusive. Antenna 2 shorter than antenna 1 peduncle. Gnathopod 1 propodus triangular, with proximal pair of grasping spines; grasping margin of propodus and dactylus slightly serrate. Gnathopod 2 with long bases with slight antero-lateral projection distally; propodus slender, rounded antero-distally, palm with proximal projection bearing single spine, and two small distal projections; dactylus slender and evenly curved. Gills elliptical. Pereopods 5 to 7 propodus with proximal pair of grasping spines.
Arctic: eastern Greenland
Caprellid, “Ghost” or “Skeleton” shrimps, so called for their skeletal appearance. Amphipod crustaceans, easily distinguished by the elongate stick-like body form and reduction of the abdominal appendages. Head is generally fused with pereonite 1. Pereopods on first 2 segments (pereonites) are most flexible and called gnathopods; gnathopods 2 being the largest, used in defense, feeding and substrate attachment. In many species pereopods 3 and 4 may also be reduced or absent. Gills on pereonites 3 + 4, rarely on pereonite 2. Pereopods 5 - 7 much smaller than 1 + 2, used for clinging to the substratum. In females, brood plates (öostegites) develop on pereonites 3 + 4. Much remains to be learnt about their biology, ecology and in many cases changing distributions.
40m
Differs from A. longicornis in having penes half as long as unsegmented appendages (of same length in A. longicornis).
