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ARTHROPODSHOLT CH. 29
PG. 701-711
ARTHROPOD CHARACTERISTICS
Segmented body
ARTHROPOD CHARACTERISTICS
Segmented body Jointed appendages
ARTHROPOD CHARACTERISTICS
Segmented body Jointed appendages Hard external skeleton
ARTHROPOD CHARACTERISTICS
Segmented body Jointed appendages Hard external skeleton Most have open circulatory system
ARTHROPOD CHARACTERISTICS
Segmented body Jointed appendages Hard external skeleton Most have open circulatory system Many have wings
SEGMENTED BODY Individual body segments in larval stage
SEGMENTED BODY Individual body segments in larval stage Adults show 3 body segments
Head Thorax (chest) Abdomen SOME display CEPHALOTHORAX (head and
chest fused together)
JOINTED APPENDAGES APPENDAGE-structure that extends form
arthropod’s body wall
JOINTED APPENDAGES APPENDAGE-structure that extends form
arthropod’s body wall ARTHROPOD=“jointed foot”
EXOSKELETON EXOSKELETON-made of carbohydrate
CHITIN-thin/flexible Muscles attach Appendages attach
EXOSKELETON EXOSKELTON-made of carbohydrate
CHITIN-thin/flexible Muscles attach Appendages attach
WATERPROOF
EXOSKELETON EXOSKELTON-made of carbohydrate
CHITIN-thin/flexible Muscles attach Appendages attach
WATERPROOF PROTECTION
REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
TRACHEA-tubes there air travels from spiracles to bloodstream
REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
TRACHEA-tubes there air travels from spiracles to bloodstream
Aquatic arthropods breath with gills
REPSIRATION AND CIRCULATION
SPIRACLES-air enters body through these openings
TRACHEA-tubes there air travels from spiracles to bloodstream
Aquatic arthropods breath with gills OPEN CIRCULATORY SYSTEM
REPSIRATION AND CIRCULATION SPIRACLES-air enters body through these
openings TRACHEA-tubes there air travels from
spiracles to bloodstream Aquatic arthropods breath with gills OPEN CIRCULATORY SYSTEM Terrestrial arthropods breath with BOOK
LUNGS
FEEDING/DIGESTION/EXCRETION
Many mouthparts/appendages for taking in food
FEEDING/DIGESTION/EXCRETION
Many mouthparts/appendages for taking in food
MALPIGHIAN TUBULES-excretory system of arthropods-
FEEDING/DIGESTION/EXCRETION
Many mouthparts/appendages for taking in food
MALPIGHIAN TUBULES-excretory system of arthropods-
Waste leaves through anus
COMPOUND EYE Composed of thousands of individual visual
units
COMPOUND EYE Composed of thousands of individual visual
units SOME also have simple eyes (single
lenses)-see only light and dark, not images
LIFE CYCLE Most reproduce sexually
LIFE CYCLE Most reproduce sexually Usually internal fertilization
LIFE CYCLE Most reproduce sexually Usually internal fertilization Many have specialized reproductive organs
LIFE CYCLE Most reproduce sexually Usually internal fertilization Many have specialized reproductive organs MOLTING-shedding of exoskeleton to allow
for growth
GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla
ARTHROPODA)
GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla
ARTHROPODA) HEXAPOD-insects
GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla
ARTHROPODA) HEXAPOD-insects MYRIAPODA-millipeds/centipedes CRUSTACEA-lobsters/shrimp
GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla
ARTHROPODA) HEXAPOD-insects MYRIAPODA-millipeds/centipedes CRUSTACEA-lobsters/shrimp CHELICERATA-spiders
GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla
ARTHROPODA) HEXAPOD-insects MYRIAPODA-millipeds/centipedes CRUSTACEA-lobsters/shrimp CHELICERATA-spiders SEE PG. 705!!!
GROUPS OF ARTHROPODS 4 main groups (SUBPHYLA of phyla
ARTHROPODA) HEXAPOD-insects MYRIAPODA-millipeds/centipedes CRUSTACEA-lobsters/shrimp CHELICERATA-spiders SEE PG. 705!!!
SUCCESS OF ARTHROPODS More arthropods than all other animal
groups COMBINED
SUCCESS OF ARTHROPODS More arthropods than all other animal
groups COMBINED More than 5 million species identified (and
growing)
SUCCESS OF ARTHROPODS More arthropods than all other animal
groups COMBINED More than 5 million species identified (and
growing) Exoskeleton provides protection (land and
water)
SUCCESS OF ARTHROPODS More arthropods than all other animal
groups COMBINED More than 5 million species identified (and
growing) Exoskeleton provides protection (land and
water) Wide range of food sources and habitats
ARACHNIDS SUBPHYLUM CHELICERATA (spiders,
scorpions, mites, ticks and horseshoe crabs)
ARACHNIDS SUBPHYLUM CHELICERATA (spiders,
scorpions, mites, ticks and horseshoe crabs)
Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) Modified into pincers or fangs
ARACHNIDS SUBPHYLUM CHELICERATA (spiders,
scorpions, mites, ticks and horseshoe crabs) Have appendages called CHELICERAE (1st pair
of appendages specialized for feeding) Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS
ARACHNIDS SUBPHYLUM CHELICERATA (spiders,
scorpions, mites, ticks and horseshoe crabs) Have appendages called CHELICERAE (1st pair
of appendages specialized for feeding) Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS
ARACHNIDS SUBPHYLUM CHELICERATA (spiders,
scorpions, mites, ticks and horseshoe crabs) Have appendages called CHELICERAE (1st pair
of appendages specialized for feeding) Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey
4 pair of WALKING LEGS No antennae CEPHALOTHORAX (head chest)
ARACHNIDS SUBPHYLUM CHELICERATA (spiders, scorpions, mites,
ticks and horseshoe crabs) Have appendages called CHELICERAE (1st pair of
appendages specialized for feeding) Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey 4 pair of WALKING LEGS No antennae CEPHALOTHORAX (head chest) ABDOMEN (belly)
ARACHNIDS SUBPHYLUM CHELICERATA (spiders, scorpions, mites,
ticks and horseshoe crabs) Have appendages called CHELICERAE (1st pair of
appendages specialized for feeding) Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey 4 pair of WALKING LEGS No antennae CEPHALOTHORAX (head chest) ABDOMEN (belly) ARACHNIDS-largest class
ARACHNIDS SUBPHYLUM CHELICERATA (spiders, scorpions, mites,
ticks and horseshoe crabs) Have appendages called CHELICERAE (1st pair of
appendages specialized for feeding) Modified into pincers or fangs
PEDIPALPS-2nd pair of appendages-catch and handle prey 4 pair of WALKING LEGS No antennae CEPHALOTHORAX (head chest) ABDOMEN (belly) ARACHNIDS-largest class
CLASS ARACHNIDA All (except some mites) are carnivores
CLASS ARACHNIDA All (except some mites) are carnivores Most terrestrial
CLASS ARACHNIDA All (except some mites) are carnivores Most terrestrial Don’t have jaws (consume only liquid food)
CLASS ARACHNIDA All (except some mites) are carnivores Most terrestrial Don’t have jaws (consume only liquid food) Enzymes turn prey into liquid (see pg. 710-
711)
CLASS ARACHNIDA All (except some mites) are carnivores Most terrestrial Don’t have jaws (consume only liquid food) Enzymes turn prey into liquid (see pg. 710-
711) Most do more good than harm (predators of
insects)
SPIDERS Chelicerae of spiders modified into fangs
SPIDERS Chelicerae of spiders modified into fangs Poison glands secrete toxins
(kills/paralyzes prey)
SPIDERS Chelicerae of spiders modified into fangs Poison glands secrete toxins
(kills/paralyzes prey) 2 poisonous species in US
BLACK WIDOW BROWN RECLUSE
SPIDERS Chelicerae of spiders modified into fangs Poison glands secrete toxins
(kills/paralyzes prey) 2 poisonous species in US
BLACK WIDOW BROWN RECLUSE
SPINNERETS-appendages at end of abdomen-secrete sticky silk strands
BROWN RECLUSE
BLACK WIDOW
BLACK WIDOW VIDEO
SCORIONS/MITES/TICKS SCORPIONS-segmented abdomen
ending in venomous stinger Grasping pincers-seizing food and sexual
reproduction
SCORIONS/MITES/TICKS SCORPIONS-segmented abdomen
ending in venomous stinger Grasping pincers-seizing food and sexual
reproduction MITES/TICKS-head, thorax and abdomen
fused into single unsegmented body Most not harmful Can spread viral/fungal infections (ex. Lyme’s
disease)
SCORIONS/MITES/TICKS SCORPIONS-segmented abdomen ending in
venomous stinger Grasping pincers-seizing food and sexual reproduction
MITES/TICKS-head, thorax and abdomen fused into single unsegmented body Most not harmful Can spread viral/fungal infections (ex. Lyme’s disease)
HORSESHOE CRAB- Ancient group of invertebrates (400 million years)
SUBPHYLUM CRUSTACEA Most marine, some fresh water
SUBPHYLUM CRUSTACEA Most marine, some fresh water CEPHALOTHORAX (head chest) and
ABDOMEN
SUBPHYLUM CRUSTACEA Most marine, some fresh water CEPHALOTHORAX (head chest) and
ABDOMEN Appendages on abdomen
SUBPHYLUM CRUSTACEA Most marine, some fresh water CEPHALOTHORAX (head chest) and
ABDOMEN Appendages on abdomen Have mandibles for feeding and two
antennae
SUBPHYLUM CRUSTACEA Most marine, some fresh water CEPHALOTHORAX (head chest) and
ABDOMEN Appendages on abdomen Have mandibles for feeding and two
antennae Breathe with gills
SUBPHYLUM CRUSTACEA Most marine, some fresh water CEPHALOTHORAX (head chest) and ABDOMEN Appendages on abdomen Have mandibles for feeding and two antennae Breathe with gills CARAPACE-exoskeleton of cephalothorax
SUBPHYLUM CRUSTACEA Most marine, some fresh water CEPHALOTHORAX (head chest) and ABDOMEN Appendages on abdomen Have mandibles for feeding and two antennae Breathe with gills CARAPACE-exoskeleton of cephalothorax NAUPLIUS-larval form (molts to become adult)
TERRESTRIAL CRUSTACEANS Sand fleas, isopods, land crabs (only
PARTIALLY adapted for land-tied to ocean)
AQUATIC CRUSTACEANS Fairy shrimp, water fleas, copepods (most
abundant multicelled food source), krill, barnacles (sessile),
AQUATIC CRUSTACEANS Fairy shrimp, water fleas, copepods (most
abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs)
AQUATIC CRUSTACEANS Fairy shrimp, water fleas, copepods (most
abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs) CARAPACE-’hood’ over cephalothorax
AQUATIC CRUSTACEANS Fairy shrimp, water fleas, copepods (most
abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs) CARAPACE-’hood’ over cephalothorax LARVA=nauplius (MOLTS several times to allow
for growth)
AQUATIC CRUSTACEANS Fairy shrimp, water fleas, copepods (most
abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs) CARAPACE-’hood’ over cephalothorax LARVA=nauplius (MOLTS several times to allow for
growth) FOOD CHAIN-fairy shrimp, water fleas, krill
AQUATIC CRUSTACEANS Fairy shrimp, water fleas, copepods (most
abundant multicelled food source), krill, barnacles (sessile),
DECAPODS-crayfish, crabs, lobsters (5 pair legs) CARAPACE-’hood’ over cephalothorax LARVA=nauplius (MOLTS several times to allow for
growth) FOOD CHAIN-fairy shrimp, water fleas, krill SESSILE-barnacles
DECAPODS LARGEST GROUP OF CRUSTACEANS
CHELIPEDS-pinchers
DECAPODS LARGEST GROUP OF CRUSTACEANS
Shrimp, crayfish, crab, lobsters CHELIPEDS-pinchers SWIMMERETS-swimming legs on ventral
abdomen
DECAPODS LARGEST GROUP OF CRUSTACEANS
Shrimp, crayfish, crab, lobsters CHELIPEDS-pinchers SWIMMERETS-swimming legs on ventral abdomen UROPOD-flattened tail on posterior end (swim
backwards)