It was a widespread genus, with fossils found in the Middle East (S. atavus, S. karakensis), North Africa (S. leptodon), Europe (S. leptodon), and North America (S. fanninensis, S. pettersi, S. priscus). While it had a long rostrum with large denticles similar to sawfishes and sawsharks, its closest living relatives are actually skates.
It was a widespread genus found in the Middle East (S. atavus, S. karakensis), North Africa (S. leptodon), Europe (S. leptodon), and North America (S. fanninensis, S. pettersi, S. priscus). Its fossils show it had a long snout with large teeth akin to sawfishes and sawsharks, yet its closest living relatives are skates.