Mytilus rodrigueziid'Orbigny, 1842d, p. 646 [1846], pl. 85, figs. 9-11 [1842] [Basis of the current name] Type Locality: Not stated [Rio Negro; Bahia de San-Blas (d'Orbigny 1846)] Range: 34°S to 42°S; 64°W to 50°W Depth: 0 to 25 m Maximum Reported Size: 46 mm Distribution: Argentina: Buenos Aires, Rio Negro References: d'Orbigny (1846) M