Eight

Number of pairs of antennae

Isopoda

Flashes bioluminescent signals specific to species

These structure is another name for a tail of a crustacean

Body regions

These substances are secreted for communication, especially to attract mates.

Asteroidea

After a complex mating ritual, male places web sacs of sperm into female seminal receptacles with his pedipalps

This structure in echinoderms is the opening to the water-vascular system

1983

These are holes in the thorax and abdomen that lead to trachea.

Diplopoda

All members of this phylum have external fertilization and free swimming larvae

This structure in sea urchins has 5 teeth and is used for feeding

These structures, also found in insects, are used for excretion

This is the kind of metamorphosis that butterflies have.

Cephalochordate

The fertile king and queen fly away to start a new colony and then lose their wings

This structure in female grasshoppers allows them to bury their eggs

This is the structure spiders use to breathe

This means their mouthparts are not contained

Thecostraca

In this group of insects the female secretes a pheromone that can be picked up by a male over a great distance

This structure in chordates is modified into part of the vertebral column in vertebrates