(1) In the morphological domain, examples of novelties include the origin of feathers, new cusp patterns in mammalian teeth and altered numbers of antennule segments in copepod crustaceans.(2) To do this, it samples the environment as frequently as seven times a second with flicks of its ‘nose ‘- two whiplike appendages, or antennules , in front of its eyes.’(3) A nauplius consists of the first three cephalic segments and the appendages belonging to those segments, the antennules , antennae, and mandibles.(4) Like many crabs, lobsters, and other crustaceans, stomatopods flick their antennules, probably to increase the velocity of their antennules relative to the surrounding fluid and reduce the boundary layer thickness.(5) The presence of urine increases olfactory sampling through antennules flicking during fights.
