Protorchestia lakei, new species (Amphipoda: Talitridae), from Maatsuyker Island, Tasmania, with a key to the genus and notes on the diversity of Tasmanian Talitridae

The genus Protorchestia Bousfield (Amphipoda: Talitridae) is recorded in Tasmania for the first time, and a new species. P. lakei, is described. A key to the 3 known species of Protorchestia is provided, and the diversity of Tasmanian Talitridae is described in terms of Bousfield's informal classification.