Abstract
ABSTRACT Sternophysingidae, a new family of gammaridean amphipods, is described on the basis of the genus Sternophysinx from subterranean ground waters of southern Africa. In addition, S. calceola, the seventh species recorded in the genus, is described from a cave in Transvaal, South Africa. Probably the most remarkable character of the new species is the presence of small phonoreceptors, called calceoli, on antenna 2, the first occurrence of this structure in the genus. The calceolus of Sternophysinx appears to be the same type as that of several other crangonyctoid genera from both Northern and Southern Hemispheres. Joint possession of this character, combined with overall morphological similarity, might be viewed as further support for the hypothesized phylogenetic affinity among members of the superfamily Crangonyctoidea from different continents.
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