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Fish: Protodus jexi Woodward
BackFish: Protodus jexi Woodward. Devonian. Campbellton, New Brunswick. Collector: R.F. Miller, 2001. New Brunswick Museum (NBMG 11983). Image width 7 mm. The shark known as Protodus jexi is known only from fossil teeth. The tooth shape is triangular, with a shallow groove down the side.