For years, paleontologists thought this ancient salmon was like a saber-toothed cat, but now facial reconstruction offers a brand new look.
Oncorhynchus rastrosus.When paleontologists announced the discovery of the largest salmon to have ever lived in 1972, they thought they had found the aquatic equivalent of theThe eight-foot-long fish was believed to have hadjutting down from its upper jaw. But now, a new reconstruction has fundamentally altered the face of this iconic fish, proposing instead that its impressive teeth stuck out sideways from its snout—like a warthog.
This study, by Philadelphia College of Osteopathic Medicine paleoecologist Kerin Claeson and colleagues, now finds that the fish’s famous teeth stuck out sideways like tusks.Refining what the fish looked like rested on both new fossil finds and a reanalysis of theto be described half a century ago. Among the earliest finds, the part of the jaws holding the prominent teeth were disarticulated from the rest of the skull.
Finding the spikes on different salmon sexes came as a surprise to the researchers. “When I talked to the collectors of the 2014 fossils, they kept finding fossils in close proximity in such a way they were likely breeding pairs, which both possessed the enormous spikes,” Claeson says. All spike-toothed salmon started to go through skull changes as they approached adulthood, each fish growing the iconic spikes.
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