How do I accurately compare a new species of beetle to a known species of beetle?

To accurately compare a new beetle species to a known species, first, conduct a detailed morphological analysis, examining key features such as body shape, size, color, and the structure of antennae and legs. Utilize taxonomic keys and consult existing literature to identify distinguishing traits. Molecular techniques, like DNA barcoding, can also provide genetic comparisons to confirm species relationships. Finally, consider ecological and behavioral factors to further delineate differences and similarities.