Stanleycaris

Stanleycaris ("Stanley's shrimp") is an extinctgenus of hurdiidradiodont from the Cambrian (Stage 3 to Miaolingian). The type species is Stanleycaris hirpex. Stanleycaris was described from the Stephen Formation near the Stanley Glacier and Burgess Shale locality of Canada, as well as Wheeler Formation of United States. A second species, S. qingjiangensis, is known from the Qingjiang biota of China. The genus was characterized by the rake-like frontal appendages with robust inner spines.