Genus Neastacilla Tattersall, 1921

Type species.

Astacilla falclandica Ohlin, 1901, by subsequent designation.

Diagnosis

(modified after King 2003b). Body cylindrical; pereonite I fused to cephalon, occasionally indicated by groove dorsally or slit ventrally; pereonite IV ~ 3-10 × longer than other pereonites; pereonites IV and V strongly geniculated. Antenna with one row of spines on each flagellar article. Pereopod I lacking an unguis; pereopods II-IV with claw-like dactylus, not flexible between carpus and propodus; pereopods V-VII with two claws on distal end of dactylus.