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Fish: Cyathaspis acadica (Matthew)
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Fish: Cyathaspis acadica (Matthew). Silurian. Nerepis, New Brunswick. Collector: G.F. Matthew, c. 1885. New Brunswick Museum (NBMG 3072). Image width (left) 8 cm. Heterostracans are extinct jawless fish. The front of the body covered with bony plates is preserved in the specimen from New Brunswick. George Matthew described this fossil specimen in 1886, the first of its kind known from North America.

