1) Animal order 2) Suborder mysticeti 
A suborder of the Order Cetacea, containing baleen whales only.
Mysticeti is the baleen whale family of mammals of the order Cetacea. They are named after the baleen plates that are present. The family includes the Blue Whale and Minke Whale.
[n] - baleen whales: right whales
mysticeti Any whale of the suborder Mysticeti, as finback and humpback whales, characterized by a symmetrical skull, paired blowholes, and rows of baleen plates for feeding on plankton.
suborder Mysticeti noun baleen whales: right whales; rorquals; blue whales; humpbacks
See Baleen Whale.