Amplexus

Amplexus (Latin "embrace") is a form of pseudocopulation in which a male amphibian or limulid grasps a female with his front legs as part of the mating process. At the same time or with some time delay, he fertilizes the female eggs with fluid containing sperm. Fossil evidence also suggests that a certain Cambrian form of euthycarcinoid (an extinct arthropod) may also have mated by amplexus.