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PHYLUM ARTHROPODA

PRESENTED BY FARKHUNDA NAZ DADC. PHYLUM ARTHROPODA. CLASSIFICATION DEFINITION THE ARTHROPODS GENERAL CHARACTERISTICS 3 SUB PHYLUMS SUBPHYLUM CHELICERATA CLASS MEROSTOMATA CLASS ARACHNIDA SUB PHYLUM UNIRAMIA CLASS CHILOPODA CLASS DIPLOPODA CLASS INSECTA SUB PHYLUM CRUSTACEA

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PHYLUM ARTHROPODA

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  1. PRESENTED BY FARKHUNDA NAZ DADC PHYLUM ARTHROPODA

  2. CLASSIFICATION DEFINITION THE ARTHROPODS GENERAL CHARACTERISTICS 3 SUB PHYLUMS SUBPHYLUM CHELICERATA CLASS MEROSTOMATA CLASS ARACHNIDA SUB PHYLUM UNIRAMIA CLASS CHILOPODA CLASS DIPLOPODA CLASS INSECTA SUB PHYLUM CRUSTACEA EXAMPLES CONTENTS

  3. KINGDOM: ANIMALIA SUB KINGDOM:INVERTEBRATA PHYLUM :ARTHROPODA(JOINTED LEGS) CLASS 1:MEROSTOMATA(horse shoe shape carapace) CLASS 2:ARACHNIDA (book lungs) CLASS 3: CRUSTACEA (with carapace) CLASS 4: MYRIAPODA (many legs) CLASS 5: INSECTA Or Hexapoda (six legs) CLASSIFICATION

  4. PICTURE

  5. Ar`throp´o`dan. pl.1.(Zool.) A large division of Articulata, embracing all those that have jointed legs. It includes Insects, Arachnida,andCrustacea.Webster's Revised Unabridged Dictionary, published 1913 by C. & G. Merriam Co. DEFINITION

  6. The Arthropods Most successful animal group ever to live Consists of over 1 million named species, 2 of every 3 animals are arthropods. ~ 1018 individuals. Inhabit all ecosystems THE ARTHROPODS

  7. The phylum is divided into six classes

  8. All have a hard exoskeleton • Composed of protein and chitin • Allows for great variation in function - biological "swiss army knives" • Must molt as they grow • Limits their size • Have well developed body segments and appendages • Have well developed sensory organs including true eyes and antennae • Have open circulatory systems & special gas exchange organs GENERAL CHARACTERISTICS

  9. Subphylum Chilicerata (arachnids, horseshoe crabs & sea spiders) Divided into 3 classes; Arachnida, Merostomata & Pycnogonida Body divided into 2 regions Abdomen Cephalothorax (fused head & thorax) Lack jaws Have 6 appendages & no antennae First appendages form chilicerae (frequently fangs) 3 SUB PHYLUMS

  10. THE CHELICERATES

  11. Very diverse class Most species parasitic or predatory Many possess book lungs for gas exchange Spiders are able to produce a strong polymer - silk Chilicera in form of fangs Class Arachnida (Spiders, Scorpions, Ticks & Mites)

  12. EXAMPLES

  13. Ancient group of species Changed little over 350 million years Aquatic, mostly found on Atlantic & gulf coasts of United States. Class Merostomata - Horseshoe crabs

  14. HORSESHOE CRAB

  15. The Horse Shoe CrabsClass XiphoneuraPhylum ArthropodaKingdom Animalia

  16. Class Insecta (insects) Class Chilopoda (Centipedes) Class Diplopoda (Millipedes) Classes Chiopoda & Diplopoda Millipedes (diplopoda) are segmented worm-like animals Have 2 pairs of legs per segment Primarily herbivores & decomposers Centipedes (Chilopoda) Usually terrestrial carnivores Have 1 pair of antennae Are often poisonous, using modified front claws to immobilize prey Subphylum Uniramia: 3 classes

  17. CLASS CHILOPODA----- CLASS DIPLOPODA

  18. Far & away the most diverse of animal groups More types of insects alone than all other animal groups combined Inhabit all terrestrial & freshwater ecosystems. Success largely attributed to coevolution with flowering plants. Class Insecta (The Insects)

  19. Insects have 6 legs 3 body parts Head Thorax Abdomen Most insects have wings, however in many species these are vestigal Have advanced excretory system composed of malphygian tubules Exchange gasses through a complex tracheal system Body Plan:

  20. COMPOUND EYES • Have complex compound eye which is usually extremely sensitive to motion and allows 3600 vision

  21. MOUTHPARTS • Have specialized jaws/mouthparts suited to their ecological niche

  22. Incomplete metamorphosis • Larva similar to adult, with differing body proportions • Undergoes a series of molts resulting in adult phenotype metamorphosis - 2 types

  23. Complete metamorphosis Larva is very unlike adult phenotype Envelopes self in a coccoon or chrysalis where body breaks-down and reforms into adult form. Complete metamorphosis

  24. Includes crabs, lobsters, crayfish, shrimp, krill & barnacles Over 40,000 species Appendages are often highly specialized Gas exchange is usually through gills Many species taste delicious in butter Subphylum Crustacea

  25. CLASS CRUSTACEA

  26. SpiderClass ArachnidaPhylum ArthropodaKingdom Animalia

  27. ScorpionClass ArachnidaPhylum ArthropodaKingdom Animalia

  28. www.google.com www.wikipedia.com www.suite101.com rEFERENCES

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