Egglarva (caterpillar)pupa (in chrysalis) adult 10 Arthropod Groups Subphylum Trilobitomorpha Class Trilobita- extinct trilobites Subphylum Chelicerata
Class Merostomata horseshoe crabs Class Arachnida- spiders, mites, etc. Subphylum Mandibulata Class Myriapoda- centipedes, millipedes Class Insecta- insects Class Crustacea- lobsters, crabs, etc. 11
Subphylum Trilobitomorpha Class TrilobitaTrilobites Successful for over 300 million years Extinct 540-200 MYA
One pair of antennae appendages 12 Subphylum Chelicerata
Chelicerae( fangs) No antenna No mandibles 4 pair of walking legs
1 pair of pedipalps 13 Class Merostomata Limulus (horseshoe crabs)
First fossils 445 MYA Lived before dinosaurs Segments-Carapace, abdomen and Telson Blood used by pharmaceutical
companies to test for endotoxins and pathogens http://shltrip.com/Horse shoe_Crab.html 14
15 pedipalps Walking legs Spines 16
10/13/2015 1. Find new seat, graded papers are at your seats. TURN IN horseshoe crab lab 2. A Tale of Two Species Horseshoe Crab Article w/ Guided Questions- Due Today BEFORE you leave 3. Class Arachnida Notes 4. Incredible World of Spiders Video w/
guided Questions 17 Class Arachnida
Spiders Scorpions Ticks Mites All Have book lungs
18 Class Arachnida Chelicerae (fangs) 1st pair of appendages around mouth- often with poison 4 pair of walking legs 2 body segments
(cephalothorax + abdomen) Except mites & ticks Most are predators Inject enzymes into prey Suck fluid into pharynx 19
Arachnid Body Regions Prosoma or Cephalothorax Ophisthosoma or Abdomen 20
Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Order Scorpionida Large pedipalps Abdominal stinger Photo (a) SS#11/PhotoDisc
21 Order Araneae Spiders Fangs with poison glands Silk glands
22 23 24 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Arachnid Book Lung 25 Dugesiella Tarantula 26
Latrodectus mactans Black widow spider Neurotoxin 27 Loxosceles reclusa Fiddle back spider
Brown recluse Brown Violin Necrotoxin 28
Loxosceles reclusa Necrosis of tissue 29 Day 3 30
Day 4 31 Day 5 32
Day 6 33 Day 9 34
Day 10 35 Order Acari Ticks Mites
Full tagmatation-all Body segments fused 36 Rocky Mountain Spotted Fever
Ticks are vector High fever Headache Muscle pain
Rash BEGINS ON EXTREMETIES 25% fatal without antibiotics 37
Dermacentor variabilis Dog tick Dermacentor andersoni Wood tick
38 39 Dermatophagoides Dust mite Allergies to fecal products 1 gram of dust holds
41 Order Opiliones One body segment Short fangs Myth- not most venomous
Daddy- long legs, harvestmen, opilioids http:// spiders.ucr.edu/da42 ddylonglegs.html Arthropod Groups
Subphylum Trilobitomorpha Class Trilobita- extinct trilobites Subphylum Chelicerata Class Merostomata horseshoe crabs Class Arachnida- spiders, mites, etc. Subphylum Mandibulata Class Myriapoda- centipedes, millipedes Class Insecta- insects
Class Crustacea- lobsters, crabs, etc. 43 Subphylum Mandibulata Class Myriapoda centipedes and millipedes Class Insecta
most diverse animal class flies, bees, beetles, ants, etc. Class Crustacea crabs, lobster, barnacles, copepod 44
Subphylum Mandibulata Two pair of antennae (anterior to feeding appendages) Third segment bear mandibles (jaws for chewing or grinding) Compound eye
45 Class Myriapoda many appendages Fewer than 10 to
hundreds of appendages Millipedes (mostly herbivorous + plain in color) Centipedes ( colorful, carnivorous)
46 Class Insecta Most biodiverse class of animals Only invert.s that can fly Distinctive head, thorax,
abdomen(3 body regions Typically three pair of legs (6) Have metamorphosis Oxygen goes directly into cells via spiracles 47
Class Crustacea Biramous appendagesseparate into two rays 3 pairs modified as mouth parts gills Naupliar larval stage Crabs, copepods,
crayfish, barnacles, lobster, shrimp, pill bugs 48 Class Crustacea: Pill Bug Only crustacean that is entirely terrestrial rollie pollies
49 50 51 Copepod
52 Barnacle Cirri Testis
Anus Penis Mouth Stomach Ovary Cement gland
53 Fig. 19.24a 54 55
Crayfish 56 57 58
1. Gonopods 2. Opening of vas deferens(duct for sperm release) 3. Opening of oviduct 4. Seminal
receptacle (opening used to accept sperm for fertilization) 59 Fig. 19.5 60
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