CLASSES OF ARTHROPOD

S

Meristomata HORSESHOE CRAB

CHARACTERISTICS

1. 2 body parts – cephalothorax and abdomen.

2. Long pointed tail

3. 5 pairs of walking legs with pincers.

Arachnida

SPIDERS TICKS

SCORPIONS

CHARACTERISTICS

1. 2 body parts – Cephalothorax

and abdomen

2. 4 pairs of walking legs.

3. Fangs with poison glands (chelicerae), and pedipalps

4. Spinnerets and web making ability.

DiplopodaCharacteristics1. Repeating segments in

body.2. 2 pairs of legs per

segment. MILLIPEDES

Chilopoda

Characteristics1.Repeated segments.

2.1 pair antennae3.1 pair of legs

per segment.

CENTIPEDES

Crustacea

CRABS

SOWBUGS

SHRIMPLOBSTERBARNACLES

Characteristics

1. 2 body parts – cephalothorax and

abdomen

2. Many paired appendages

A. At least 5 pairs of walking legs.

B. Chelipeds – Food getting and defense.

C. Swimmerets for protecting eggs.

D. Uropod for fast getaway.

E. 2 pairs of antennae

F. Many mouth parts.

Insecta

Characteristics

1. 3 body parts – head thorax abdomen

2. 3 pairs of walking legs.

3. 1 or 2 pairs of wings.4. 1 pair of antennae.5. Most undergo metamorphosis