ARTHROPODS“Jointed-legs”

ARTHROPODS

Chitinous exoskeletonPaired of jointed appendagesGrowth accompanied by ecdysis or moltingOpen circulatory systemVentral nervous systemComplete digestive tractMetamorphosis

TYPES OF ARTHROPODS

Arachnids CrustaceansChilopodsDiplopodsInsects

ARACHNIDS

Black Widow

The female black widow is one of the most poisonous creatures with venom more potent than coral snakes, cobras or rattlesnakes. However her bite is rarely fatal in humans. Why not?

ARACHNIDS

Eight pairs of appendagesLack antennaeLack mandiblesDivided into prosoma (cephalothorax) and

opisthosoma (abdomen)Gas exchange through book gills

BOOK GILLS

CRUSTACEANS

CRUSTACEANS

The head has two compound eyes, two pairs of antennae, and three pairs of mouthparts.

A pair of green glands excrete wastes near the base of antennae.

The abdominal segments have swimmerets (swimming legs)

The sexes are separate. Eggs are attached to the swimmerets (swimming legs) of the female. The first pair is enlarged in the male (it is used to pass sperm to the female).

The tail is fan-shaped, and ends in uropods and a telson. Open circulatory systemVentral nervous system

CHILOPODS

CENTIPEDES

1 pair of legs per body segment1 pair of poison claws/fangs underneath the

headAntennae presentSimple eyesCarnivorous

DIPLOPODS

2 pairs of legs per body segment, although some juveniles may posses only 1 pair per segment

Simple eyes if present, although many have no eyes1 pair of antennaeChewing mouthpartsHerbivores and Scavengers

MILLIPEDES

INSECTS

A body divided into three parts (head, thorax and abdomen)

Three pairs of legs Usually one pair of antennae and a pair of compound

eyes (a few exceptions to these characteristics are found)

Usually two pairs of wings (absent in many insects such as lice, fleas, ants; flies have one pair of wings)

INSECTS

A body divided into three parts (head, thorax and abdomen)

Three pairs of legs Usually one pair of antennae and a pair of compound

eyes (a few exceptions to these characteristics are found)

Usually two pairs of wings (absent in many insects such as lice, fleas, ants; flies have one pair of wings)

INSECT

Hydrena ateneo

Source: http://www.philstar.com/headlines/2013/09/08/1185551/new-beetle-species-found-ateneo-campus

SOURCE

http://www.ento.csiro.au/