Archive image from page 111 of The Cyathaspididae; a family of. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates cyathaspididaefa135deni Year: 1964 Fig. 138. Americaspis americana, slab of Landisburg sandstone from near Andersonburg, Pennsylvania, with impressions of numerous shields; CNHM, PF3321 (X 1/4).

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