Microstructure (IMAGE) American Museum of Natural History Caption Archaeopteryx bone microstructure shows flattened and parallel bone cells, or osteocyte lacunae. Credit Gregory Erickson Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.