Transcript Phylum Arthropoda BIO 2215 Oklahoma City Community College Dennis Anderson Jointed Legs Number of species Mollusca Chordata Platyhelminthes Nematoda Arthropoda Porifera Annelida Echinodermata Sarcomastigophora Apicomplex Ciliophora.

Phylum Arthropoda
BIO 2215
Oklahoma City Community College
Dennis Anderson
1
Jointed Legs
2
Number of species
Mollusca
Chordata
Platyhelminthes
Nematoda
Arthropoda
Porifera
Annelida
Echinodermata
Sarcomastigophora
Apicomplex
Ciliophora
3
Characteristics of Arthopods
• Segmented, bilateral
body
• Jointed appendages
• Exoskeleton
• Open circulatory
system
• Ventral nerve cord
• Compound eyes
4
Arthropods
Most Successful Animals
•
•
•
•
Number of species
Diversity
Distribution
Longevity
5
Reasons for Success
• Versatile exoskeleton
• Segmentation
• Oxygen piped directly
to cells (terrestrial)
• Highly developed
sensory organs
• Complex behavior
• Metamorphosis
6
7
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.
8
Compound Eye
9
Metamorphosis
10
Monarch Butterfly
11
Uniramia
Echinodermata
Chelicerata
Vertebrata
Lophophores
Crustacea
Other Chordata
Arthropoda
Annelida
Hemichordata
Other
pseudocoelomates
Nematoda
Mesozoa
Sarcomastigophora
Ciliophora
Apicomplexa
Microspora
Mollusca
Nemertea
Platyhelminthes
Ctenophora
Cnidaria
Placozoa
Porifera
Myxozoa
12
Arthropod Groups
•
•
•
•
Subphylum Trilobita
Subphylum Crustacea
Subphylum Chelicerata
Subphylum Uniramia
13
Subphylum Trilobita
• Extinct
– 200 MYA
• One pair of antennae
• Biramous
appendages
14
Subphylum Chelicerata
•
•
•
•
•
Chelicerae
No antenna
No mandibles
4 pair of walking legs
1 pair of pedipalps
15
Class Merostomata
• Limulus
– Dates back to Triassic
– 245 MYA
• Carapace
• Telson
16
17
18
Class Arachnida
•
•
•
•
Spiders
Scorpions
Ticks
Mites
19
Class Arachnida
• 4 pair of legs
• 2 body segments
– Except mites & ticks
• Most are predators
– Inject enzymes into
prey
– Suck fluid into pharynx
20
Arachnid Body Regions
Prosoma or
Cephalothorax
Ophisthosoma or Abdomen
21
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Order Scorpionida
Large pedipalps
Abdominal stinger
Photo (a) © SS#11/PhotoDisc
22
Order Araneae
• Spiders
• Fangs with poison
glands
• Silk glands
23
24
25
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Arachnid Book Lung
26
Dugesiella
• Tarantula
27
Latrodectus mactans
• Black widow spider
• Neurotoxin
28
Loxosceles reclusa
• Fiddle back spider
– Brown recluse
– Brown
– Violin
• Necrotoxin
29
Loxosceles reclusa
• Necrosis of tissue
30
Day 3
31
Day 4
32
Day 5
33
Day 6
34
Day 9
35
Day 10
36
Order Acari
• Ticks
• Mites
• Body segments fused
37
Rocky Mountain Spotted Fever
•
•
•
•
•
Ticks are vector
High fever
Headache
Muscle pain
Rash
– BEGINS ON
EXTREMETIES
• 25% fatal without
antibiotics
38
Dermacentor variabilis
Dog tick
Dermacentor andersoni
Wood tick
39
40
Dermatophagoides
• Dust mite
• Allergies to fecal
products
• 1 gram of dust holds
250,000 droppings
41
Trombicula
• Chigger mite
• Larva feed on skin
• Dermatitis
42
Subphylum Crustacea
43
Subphylum Crustacea
• Two pair of antennae
• Biramous
appendages
44
45
46
Crayfish
47
48
49
Fig. 19.5
50
51
Fig. 19.7
52
Lobster
53
Shrimp
54
Crab
55
Pill Bug
56
57
58
Copepod
59
Barnacles
60
Barnacle
Cirri
Testis
Penis
Anus
Mouth
Stomach
Ovary
Cement gland
61
Fig. 19.24a
62
Subphylum Uniramia
• One pair of antennae
• Uniramous
appendages
63
Class Chilopoda
• One pair of legs per
body segment
• Poison fang
• Flattened bodies
• Carnivores
64
Class Diplopoda
• Two pair of
appendages per body
segment
• Cylindrical body
• Herbivores
65
The End
66