Squalus alsaticus (Andreae, 1892)

The small, highly distinct teeth of this species slant sharply toward the corners of the mouth, forming a continuous, razor-like cutting edge along the jaw. Like modern spiny dogfish sharks, this predator featured heavy, sharp defensive spines positioned right in front of its dorsal fins to protect it from larger apex predators. Finding these small teeth in the regional clay confirms a highly structured food web where these small, pack-hunting sharks cruised close to the muddy seafloor to hunt for bottom fish and small crabs.