Fossils can tell scientists a lot about an animal such as their morphology, their environment, and where to place them in the tree of life. One thing though that’s very difficult to observe in the fossil record is an animal’s reproductive behavior. It takes a very uniquely preserved fossil to reveal the secrets behind reproductive strategies in some of the earliest complex animals.
Click here for original story, Clasper appendages discovered in mid-Cambrian trilobite show horseshoe crab-like mating behavior
Source: Phys.org