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Title: Annularia Fossil
Caption: Annularia is the scientific name for the leaves of the horsetail genus Calamites. Annularia consists of delicate rosettes of leaflets, which can be oval or lance-shaped, depending on the species. This genus occurs in Carboniferous strata in North America, Europe and Asia.
Credit: Album / Science Source / BIOPHOTO ASSOCIATES
Image size: 5104 × 3424 px | 50.0 MB
Print size: 43.2 × 29.0 cm | 2009.4 × 1348.0 in (300 dpi)