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ARTHROPODA
Gk. “arthros”– joint + “podos”– footGk. “arthros”– joint + “podos”– foot
VARIETY
Hermit Crab
Fairy Shrimp
Centipede
Horseshoe
Crab
Size
Color
Shape
Method of Movement
Jointed Legs
Exoskeleton
Segmented Body
Distinct Head
Compound Eyes (most cases)
• Common throughout marine, freshwater, terrestrial, and even aerial environments
• Common throughout marine, freshwater, terrestrial, and even aerial environments
GENERAL CHARACTERISTICS
Characteristics of Arthropods Segmented Jointed appendages Hard external skeleton 3 parts-head, thorax, abdomen
(arachnids exception) Exoskeleton-hard, external skeleton
made of chitin Molting- shed old exoskeleton and
secrete a larger one, very vulnerable after molting
• Complete digestive tract (mandible-chewing
or proboscis- sucking) with a dorsal heart and a ventral nervous system
• Respiration through gills, trachea, book lungs or body surface
• Sensory organs include antennae and hairs, simple and compound eye
• Reproduces (mostly sexually), one to several larval stage
• Complete digestive tract (mandible-chewing
or proboscis- sucking) with a dorsal heart and a ventral nervous system
• Respiration through gills, trachea, book lungs or body surface
• Sensory organs include antennae and hairs, simple and compound eye
• Reproduces (mostly sexually), one to several larval stage
• The muscle system is more or less assisted by hydraulics originated from the blood pressure created by the heart
• Respiration through gills, trachea, book lungs or body surface
• With open circulatory system. Haemolymph that contains haemocyanin, a copper-based oxygen-carrying protein
• The muscle system is more or less assisted by hydraulics originated from the blood pressure created by the heart
• Respiration through gills, trachea, book lungs or body surface
• With open circulatory system. Haemolymph that contains haemocyanin, a copper-based oxygen-carrying protein
Body parts
Ganglia-clusters of nerve cells along a nerve cord
Compound eyes-may facets each with their own lenses, some have single lenses and some have both
Spiracles-holes in the exoskeleton that allow gas exchange (book lungs in arachnids)
Trachea-chitin lined tubes in spiracles
Four SUBPHYLA of Arthropods Trilobita – thought to be the oldest
arthropods Chelicerata – two part body and
mouthparts called chelicerae Crustacea – hard exoskeleton, two
pairs of antennae, mouthparts called mandibles
Uniramia – contains more species than all other groups of animals alive today
SUBPHYLUM - Trilobites
• CLASS TRILOBITA – Trilobites
SUBPHYLUM CHELICERATA
• CLASS ARACHNIDA – Spiders, Scorpions, Ticks
• CLASS MEROSTOMATA – Horseshoe crabs
• CLASS PYCNOGONIDA – Sea spiders
SUBPHYLUM - Trilobites
• CLASS TRILOBITA – Trilobites
SUBPHYLUM CHELICERATA
• CLASS ARACHNIDA – Spiders, Scorpions, Ticks
• CLASS MEROSTOMATA – Horseshoe crabs
• CLASS PYCNOGONIDA – Sea spiders
REPRESENTATIVE ORGANISMS: REPRESENTATIVE ORGANISMS:
SUBPHYLUM UNIRAMIA
• CLASS CHILOPODA – Centipedes
• CLASS DIPLOPODA - Millipedes
• CLASS INSECTA – Insects
• Class Branchiopoda – Brine shrimp
SUBPHYLUM UNIRAMIA
• CLASS CHILOPODA – Centipedes
• CLASS DIPLOPODA - Millipedes
• CLASS INSECTA – Insects
• Class Branchiopoda – Brine shrimp
• CLASS CEPHALOCARIDA – Horseshoe shrimp
• CLASS MAXILLOPODA – Barnacles, andFish lice
• CLASS MALACOSTRATA – Lobsters, Crabs, and Shrimps
• CLASS CEPHALOCARIDA – Horseshoe shrimp
• CLASS MAXILLOPODA – Barnacles, andFish lice
• CLASS MALACOSTRATA – Lobsters, Crabs, and Shrimps
CLASS CRUSTACEA Lobsters, Crabs and Shrimps
CLASS CRUSTACEA Lobsters, Crabs and Shrimps
American lobster
Homanus americanus
American lobster
Homanus americanus
Blue crabCallinectes
sapidus
Blue crabCallinectes
sapidus
CLASS INSECTAAnts, Beetles and Bugs
CLASS INSECTAAnts, Beetles and Bugs
ORDER HYMENOPTERA
Fire antSolenopsis
invicta
ORDER HYMENOPTERA
Fire antSolenopsis
invicta
ORDER ORTHOPTERAMigrating locust
Locusta migratoria
ORDER ORTHOPTERAMigrating locust
Locusta migratoria
ORDER COLEOPTERAWeevil
ORDER COLEOPTERAWeevil
BeetleBeetle
MAJOR PARTS OF AN INSECTMAJOR PARTS OF AN INSECT
Insects that have piercing and sucking mouthparts are called BUGS while BEETLES are insects distinguished as those having forewings modified into hard wing cases that cover and protect the hind wings and abdomen!
Insects that have piercing and sucking mouthparts are called BUGS while BEETLES are insects distinguished as those having forewings modified into hard wing cases that cover and protect the hind wings and abdomen!
CLASS ARACHNIDA Spiders, Ticks and Scorpions
CLASS ARACHNIDA Spiders, Ticks and Scorpions
Wolf spiderLycosa tarentula
Wolf spiderLycosa tarentula
The Goliath Bird-eating tarantula (Theraphosa
blondi) But can grow as much as 1 ft in diameter!
The Goliath Bird-eating tarantula (Theraphosa
blondi) But can grow as much as 1 ft in diameter!
CLASS MEROSTOMATA Horseshoe crabs
CLASS MEROSTOMATA Horseshoe crabs
CLASS CHILOPODA Centipedes
CLASS CHILOPODA Centipedes
Peruvian GiantPeruvian Giant
CLASS DIPLOPODA Millipedes
CLASS DIPLOPODA Millipedes
Harpaphe haydeniana Harpaphe haydeniana
CLASS TRILOBITA Trilobites
CLASS TRILOBITA Trilobites
LIFE CYCLES OF SOME INSECTS
LIFE CYCLES OF SOME INSECTS
LIFE CYCLE OF A DRAGONFLY(CLASS INSECTA ORDER ODONATA)
LIFE CYCLE OF A DRAGONFLY(CLASS INSECTA ORDER ODONATA)
LIFE CYCLE OF A FRUIT FLY
(CLASS INSECTA ORDER DIPTERA)LIFE CYCLE OF A FRUIT FLY
(CLASS INSECTA ORDER DIPTERA)
LIFE CYCLE OF A BUTTERFLY
(CLASS INSECTA ORDER LEPIDOPTERA)LIFE CYCLE OF A BUTTERFLY
(CLASS INSECTA ORDER LEPIDOPTERA)
(Larva) Caterpillar
(Pupa) Chrysalis
LIFE CYCLE OF A GRASSHOPPER
(CLASS INSECTA ORDER ORTHOPTERA)LIFE CYCLE OF A GRASSHOPPER
(CLASS INSECTA ORDER ORTHOPTERA)
MIMICRY AND CAMOUFLAGEMIMICRY AND CAMOUFLAGE
Mimicry - take on the appearance of (another animal or plant) in order to deter predators
Camouflage - the natural coloring or form of an animal which enables it to blend in with its surroundings
Mimicry - take on the appearance of (another animal or plant) in order to deter predators
Camouflage - the natural coloring or form of an animal which enables it to blend in with its surroundings
ECOLOGICAL IMPORTANCEECOLOGICAL IMPORTANCE
• Serve as food source for both animals and humans
• Aid in the propagation of plant species by means of cross-pollination
• Control the population of some harmful organisms
• Some act as scavengers or saprotrophs
• Serve as food source for both animals and humans
• Aid in the propagation of plant species by means of cross-pollination
• Control the population of some harmful organisms
• Some act as scavengers or saprotrophs