Sub - Phylum Chelicerata

1
Sub - Phylum Chelicerata
Class Arachnida

• Arthropods without mandibles and antennae.
• Have 6 pairs of appendages
• Including
• 4 Pairs of walking legs
• One pair of fanglike mouth parts (chelicerae)
• One pair of pedipalps
• 2 Body sections
• Cephalothorax
• Abdomen

2
Chelicerates
3
Cephalothorax
Abdomen
1
2
6
4
3
9
5
8
555
Fanglike chelicera
5
7
4
Functions

• Chelicerae contain fangs used to stab and
  paralyze prey with venom.
• Pedipalps grab prey
• Spinnerets Organs that contain silk glands,
  force silk through these.
• Book lungs Used for respiration (O2 enters
  through the spiracle.

5
Functions continue

• Malpighian tubules For excretion of metabolic
• wastes.

• Chelicerate groups
• Horsehoe crabs
• Sea spiders
• Arachnids include spiders, scorpions, mites,
• ticks and chiggers.

• Adaptations shared by arachnids
• Waterproof cuticle
• Book lungs
• Malpighian tubules
• Spiracles

6

• Types of arachnids
• Spiders
• Mites
• Ticks
• Chiggers
• Scorpions