Fossil specimen of the lycophyte Stigmaria sp. from the Carboniferous of Illinois. Stigmaria is a rhizomorph, or root-like anchoring structure for ancient lycophyte trees. Note the helically arranged, circular rootlet scars. Specimen is from the Cornell University Paleobotanical Collection (CUPC), Ithaca, New York. Length of specimen is approximately 18.5 cm. Model by Emily Hauf.
Comments