 In 2007, French palaeontologist Eric Buffetaut considered the teeth of "S. girardi" very similar to those of "Baryonyx" (and "S. cultridens") except for the stronger development of the ribs (lengthwise ridges) on the tooth crown, suggesting that the remains belonged to the same genus.Buffetaut agreed with Milner that the teeth of "S. cultridens" were almost identical to those of "B. walkeri", but with a ribbier surface.The former taxon might be a senior synonym of the latter (since it was published first), depending on whether the differences were within a taxon or between different ones.