it is image of pentremites radiate, the diagram in the image is of spindle shape from upside and narrow to downside, vintage line drawing or engraving

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Size: 2222px × 5000px
Photo credit: © Patrick Guenette / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: age, ancient, art, black, carboniferous, drawing, early, engraved, engraving, form, geology, illustration, life, line, paleozoic, pentremites, pyriformis, radiate, vector, vectors, vintage, white