4. Arthropods Flashcards
(20 cards)
Which appendages replace jaws in Chelicerates?
Chelicerae
How many pairs of antennae do Myriapods have?
one
What subphylum do horseshoe crabs belong to?
Chelicerata
How many pairs of walking legs do organisms from the subphylum hexapoda have?
six
What is the exoskeleton of the horseshoe crab made from
chitin
Name the tagmata found in organisms from belonging to subphylum Myriapoda
Head / Trunk
Name the tagmata found in organisms belonging to subphylum crustacea
Cephalothorax / Abdomen
Name the two chambers of the stomach of crayfish
Cardiac stomach / Pyloric stomach
Name the tagmata found in organisms from subphylum hexapoda
Head / Thorax / Abdomen
What is the role of tympana
It is used for hearing
What is the role of gill bailer
Draw water, thus oxygen into the gill chamber
What is the role of the telson in the horseshoe crab
used for anchoring in sand, ploughing through sand, and righting when flipped over
What is the role of the pedipalps in the male horseshoe crab
Used to hold onto the female during reproduction
What is the role of spinnerets
makes silk for making webs
What is the role of pleopods
They are used to transfer sperm cells to the female
Name 3 different appendages found in the cephalothorax of the crayfish
Antennae / Walking legs / Chelipeds
Name 2 specimen from todays lab that have a telson
Crayfish
Horseshoe crab
Name specimen from today’s lab that has book lungs
Garden Spider
Define tagmata
Distinct functional body units.
Name 2 characteristics that generally make spiders sexual dimorphic
Size - Male are smaller
Pedipalps in male have evolved to be used for transferring sperm into female epigyne.
