Arthropoda

Question 1

What animals are included in arthropods

Answer 1

invertebrates
crabs, spiders, scorpion, shrimp

Question 2

General characteristics of arthropods

Answer 2

• JOINTED APPENDAGES eg legs, antennae , mouthparts
• segmented body covered in chitin exoskeleton
• Each segment has walking legs and they are repetitive segments
• open circulatory system
• nerve system- ganglia

Question 3

Role of genus myriapoda

Answer 3

• centipedes and millipedes
• play a role in forested regions
• they are of importance to understand animal evolution (seen early in history)
• dependence on stable conditions and don’t rlly migrate

Question 4

Where do you find genus scolopendra

Answer 4

*centipedes found in tropics/warmer climate
* can exceed 30cm
* active predators
* bite with venom causing swelling
* scolopendra cingulata in Mediterranean

Question 5

Features of genus crustacea

Answer 5

*lobsters, crabs, crayfish, shrimp, copepods, barnacles
* 2 pairs antennae, pair of mandibles, eyes on stalks usually
* Crustaceans are key players in water food webs

Question 6

genus cyclops is the intermediate hosts for what parasites

Answer 6

Drancunculus medenesis (nematode)
Diphyllobothrium latum ( cestode)

Question 7

how many legs do class arachnids have
structure of spider very brief

Answer 7

spiders, scorpions, ticks, mites
4 pairs of legs (8)

spiders has cephelothorax which has chelicera (like fangs) which have poison glands

pedipalps have hairs and help catch prey

Question 8

What is the common name for Latrodectus tredecimgutattus
how many spots
where do they make their webs
are their bites dangerous

Answer 8

Mediterranean black widow spider

13 red spots

webs on land not on trees

bite dangerous but not fatal, causes calcium influx

Question 9

What do the pedipalps on scorpions form into

Answer 9

pincers

Question 10

Leiurus quinquestriatus common name

Answer 10

palestine yelloiw scorpion, deathstalker

sting extremely painfu;

peptide chlorotoxin part of venom