A new species of Sunamphitoe (Amphipoda: Ampithoidae) that bores into the primary fronds of kelps in South Africa

The herbivorous amphipod Sunamphitoe roberta n. sp. is described from the canopy of kelp beds in False Bay, South Africa. The new species has unusual habits, small family groups burrowing directly into the margins of the swollen primary fronds of the kelp Ecklonia maxima (Osbeck) Papenfuss, 1940. Morphologically, the new species is best distinguished from other species of Sunamphitoe by strong rows of dorsal spines on the outer rami of uropods 1 and 2. These spine rows appear to be employed as 'drill-bits' to excavate kelp tissue and create the burrows. Damage to hosts does not appear to be fatal, but requires further investigation.