Abstract

The distribution of the filter-feeding atyid shrimp Australatya striolata was extended northwards to 12º 45'S,143º 12'E and southwards to 37º 29'S,149º 35'E. The lowest altitude for adults tended to decrease with increasing latitude, and the northern limit coincides with the limit of suitable montane habitats. Specimens of Central American atyids in the Museum National d'Histoire Naturelle, Paris, and allegedly collected by von Mueller in Victoria may have been confused with A. striolata. Clinal variation was demonstrated, and a possible relationship with current speeds is discussed.