LAB: Arthropods Flashcards Preview

Biology 2 > LAB: Arthropods > Flashcards

Flashcards in LAB: Arthropods Deck (12)
Loading flashcards...
1

​Arthropods

  • Segmented
  • Jointed appendages
  • Body segments fused into tagma
  • exoskeleton of chitin
  • Ecdysis

 

 

 

2

​Phylum

Arthropoda

3

Trilobites

  • an early arthropod
  • thought to be first arthropod

4

​Chelicerates

  • Horseshoe crabs, spiders, ticks, scorpions

5

Horseshoe crab

  • Two tagmata:
    • Cephalothorax + abdomen
  • Chelicerae - 1st pair of feeding appendages
  • Pedipalps - 2nd pair of feeding appendages
  • No antennae

6

Spiders

  • chelicerae modified into fangs

7

Ticks

  • Parasitic chelicerates
  • vector of  Lyme's Disease

8

​Scorpions

  • pedipalps modified into pincers

9

Crustaceans

  • Crabs, shrimp, crayfish and barnacles

10

​Myriapods

  • Centipedes and millipedes
    • predators - herbivores/detritivores

11

Hexapods

  • Insects
  • Most diverse group of arthropods
  • 3 Tagmata: Head + Thorax + abdomen
  • 3 pair of walking legs
  • Wings

 

  • Incomplete metamorphism -  larvae resembles adult but is much smaller
  • Complete metamorphism - dramatic changes between stages. Ex. butterfly

12

Crayfish ANATOMY