Despite their limited temporal and spatial distribution, the generic diversity of the group was high, with five genera currently recognized12,14,15,16. They ranged from ~0.4 to ~2.0 m in adult body length and had a heavily built trunk covered by dorsal dermal ossicles and overlapping g...
During the lunge feeding of rorqual whales, food items are first captured with a large amount of water in a gular pouch, containing ventral groove blubber that stretches extensively49. This expansion of the gular pouch is associated with widening of the mandible through rotation of each ramus. ...