Download presentation
Presentation is loading. Please wait.
1
Phylum Arthropoda
2
Jointed Legs
3
Number of species Mollusca Chordata Platyhelminthes Nematoda
Arthropoda Porifera Annelida Echinodermata Sarcomastigophora Apicomplex Ciliophora
4
Characteristics of Arthopods
Segmented, bilateral body Jointed appendages Exoskeleton Open circulatory system Ventral nerve cord Compound eyes
5
Arthropods Most Successful Animals
Number of species Diversity Distribution Longevity
6
Reasons for Success Versatile exoskeleton Segmentation
Oxygen piped directly to cells (terrestrial) Highly developed sensory organs Complex behavior Metamorphosis
7
Fig
8
Modifications of Exoskeleton
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Modifications of Exoskeleton From A Life of Invertebrates, Copyright © 1979, W. D. Russell-Hunter.
9
Compound Eye
10
Metamorphosis
11
Monarch Butterfly
12
Echinodermata Uniramia Chelicerata Vertebrata Crustacea Other Chordata
Lophophores Crustacea Other Chordata Arthropoda Annelida Hemichordata Mollusca Other pseudocoelomates Nemertea Platyhelminthes Nematoda Ctenophora Cnidaria Mesozoa Placozoa Sarcomastigophora Ciliophora Porifera Apicomplexa Microspora Myxozoa
13
Arthropod Groups Subphylum Trilobita Subphylum Crustacea
Subphylum Chelicerata Subphylum Uniramia
14
Subphylum Trilobita Extinct One pair of antennae Biramous appendages
200 MYA One pair of antennae Biramous appendages
15
Subphylum Chelicerata
Chelicerae No antenna No mandibles 4 pair of walking legs 1 pair of pedipalps
16
Class Merostomata Limulus Carapace Telson Dates back to Triassic
245 MYA Carapace Telson
17
Fig. 18.2a
18
Fig. 18.2b
19
Class Arachnida Spiders Scorpions Ticks Mites
20
Class Arachnida 4 pair of legs 2 body segments Most are predators
Except mites & ticks Most are predators Inject enzymes into prey Suck fluid into pharynx
21
Arachnid Body Regions Prosoma or Cephalothorax Ophisthosoma or Abdomen
22
Order Scorpionida Large pedipalps Abdominal stinger
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Order Scorpionida Large pedipalps Abdominal stinger Photo (a) © SS#11/PhotoDisc
23
Order Araneae Spiders Fangs with poison glands Silk glands
24
Fig. 18.4
25
Fig. 18.5
26
Copyright © The McGraw-Hill Companies, Inc
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Arachnid Book Lung
27
Dugesiella Tarantula
28
Latrodectus mactans Black widow spider Neurotoxin
29
Loxosceles reclusa Fiddle back spider Necrotoxin Brown recluse Brown
Violin Necrotoxin
30
Loxosceles reclusa Necrosis of tissue
31
Day 3
32
Day 4
33
Day 5
34
Day 6
35
Day 9
36
Day 10
37
Order Acari Ticks Mites Body segments fused
38
Rocky Mountain Spotted Fever
Ticks are vector High fever Headache Muscle pain Rash BEGINS ON EXTREMETIES 25% fatal without antibiotics
39
Dermacentor variabilis
Dog tick Dermacentor andersoni Wood tick
40
Fig
41
Dermatophagoides Dust mite Allergies to fecal products
1 gram of dust holds 250,000 droppings
42
Trombicula Chigger mite Larva feed on skin Dermatitis
43
Subphylum Crustacea
44
Subphylum Crustacea Two pair of antennae Biramous appendages
45
Fig. 19.3
46
Fig. 19.1
47
Crayfish
48
Fig. 19.2a
49
Fig. 19.2b
50
Fig. 19.5 Fig. 19.5
51
Fig. 19.6
52
Fig. 19.7 Fig. 19.7
53
Lobster
54
Shrimp
55
Crab
56
Pill Bug
57
Fig c
58
Fig c
59
Copepod
60
Barnacles
61
Barnacle Cirri Testis Penis Anus Mouth Stomach Ovary Cement gland
62
Fig a Fig a
63
Subphylum Uniramia One pair of antennae Uniramous appendages
64
Class Chilopoda One pair of legs per body segment Poison fang
Flattened bodies Carnivores
65
Class Diplopoda Two pair of appendages per body segment
Cylindrical body Herbivores
66
The End
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.