Falcatus | The Prehistoric Unicorn Sharks

One of the least often thought of parts of a shark’s anatomy is the fin – specifically the dorsal fin. That sounds contradictory considering it’s the dorsal fin that breaks the surface of the water when movies want to villainize the sea puppies, but it’s usually the mouth, the colors, and the behavior that is focused on in shark discussions. At least, I assume so if you’re in those social circles. I wish I were. Anyway, despite all that, there was once an entire group of cartilaginous shark relatives that developed the most elaborate and interesting fins and spines to ever breach the surface of the water, and one of the most unusual examples of this group is the adorably diminutive Falcatus!
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✅ RESEARCH ✅
Lund, Richard; Melton, William G., Jr. (1982). "A new actinopterygian fish from the Mississippian Bear Gulch Limestone of Montana". Palaeontology. 25 (3): 485–498.

The morphology of Falcatus falcatus (St. John and Worthen), a Mississippian stethacanthid chondrichthyan from the Bear Gulch Limestone of Montana. Journal of Vertebrate Paleontology 5(1):1-19.

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