Jammalia

Jammalia (commonly referred to as jammals) are a class under Xenochordata and are distinguished by their similarities to mammals of Earth (class Mammalia), in that they give live birth and make milk, but they are different from Slammalia and Whammalia due to the fact that they have the ability to jam, that being a special form of dancing in which a jammal repeatedly slams its feet against the ground in attempt to cause the ground to shake or at the very least make noise. They are named after the word jam.