1. Phylum Arthropoda

2. Phylum Arthropoda Protostome Eucoelomate Ecdyzoa Jointed Appendages
Thick, chitin exoskeleton
Tagmata – grouping/fusion of segments

3. Taxonomy of Artrhopods (Extant)
Phylum Arthropoda (Extant)
Subphylum Chelicerata
scorpions, spiders, horseshoe crabs
Subphylum Crustacea
Aquatic mandibulates
Subphylum Uniramia
Terrestrial mandibulates
Phylum Arthropoda (Extinct)
Subphylum Trilobita

4. Most Life on Earth is an Arthropod

5. SP Trilobita
Fig. 18.1

6. Subphylum Chelicerata
1st pr of appendages are chelicera
4 pr of walking appendages
No mandibles
No antennae
Tagmata: cephalothorax & abdomen
Fig. 18.CO

7. Fig

8. SP Chelicerata, Class Merostomata
Fig. 18.2a
Limulus limus – horseshoe crab

9. SP Chelicerata, Class Merostomata
Fig. 18.2b

10. SP Chelicerata, Class Pycnogonida
Fig. 18.3

11. SP Chelicerata, Class Arachnida, Order Araneae
Fig. 18.4

12. Aranean Anatomy
Fig. 18.5

13. Regional Poisonous Spiders
Lactrodectus mactans
Loxosceles reclusa

14. Brown Recluse Bite Victom

15. Golden Orb Spider/Garden Spider
Argiope aurantia
Tan Tarantula
Aphonopelma anax

16. Class Arachnida, Order Opiliones
Fig b

17. Class Arachnida, Order Solifugae
Eremobates sp

18. Class Arachnida, Order Amblypygi

19. Class Arachnida, Order Scorpiones
Paninus imperator (Emperor scorpion)

20. Lethally Poisonous Scorpions
Leiurus quinquestriatus
Centruroides exilicauda

21. Class Arachnida, Order Acari
Rhipicephalus sanguineus Brown dog tick
Dermacentor variabilis American dog tick
Rocky mountain spotted fever

22. Class Arachnida, Order Acari
Ixodes scapularis Deer tick
Lyme disease

23. Class Arachnida, Order Acari

24. Class Arachnida, Order Acari
Eutrombicula alfreddugesi Chigger
Sarcoptes scabiei scabies mite

25. Class Arachnida, Order Acari
Dermatophagoides spp
Dust mite
Fig