ARTHROPODS HOLT 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)