Lecture 22 & 23

Question 1

What are Xiphosura

Answer 1

horseshoe crabs
-not related to crabs
-compund eyes
-long terminal spine
-larvae are planktonic

Question 2

What are Myriapoda

Answer 2

centipedes/millipedes
-3+ pairs of legs
-1 pair antennae

Question 3

What are Diplopoda

Answer 3

Millipedes
-two pairs of legs
-diple=double
-Detritivorous or herbivorous

Question 4

What are Chilopoda

Answer 4

Centipedes
-1 pair of legs per segment
-have poison claws

Question 5

What are Pancrustaceans (crustaceans)

Answer 5

Crabs, lobsters, shrimp

Question 6

Characteristics of crustaceans

Answer 6

-exoskeleton strengthened with calcium carbonate
-2 pairs antennae
-cephalothorax covered by carapace
-mandible for mouth

Question 7

How do crustaceans exchange gases

Answer 7

Aquatic: through gills
Terrestrial: tracheae

Question 8

Steps of Crustacean life style

Answer 8

-separate sexes
-sperm transfer via copulation
-females brood eggs until hatch

Question 9

What are hexapoda

Answer 9

6-legged arthropods
-class Insecta
-most diverse hexapods
-most species-rich of all animal groups

Question 10

What happens during incomplete metamorphosis of a hexapod

Answer 10

-juveniles (nymphs) share morphology & habitat with adult
-wings develop slowly

Question 11

What happens during complete metamorphosis of a hexapod

Answer 11

-wings develop all at once with stage called pupa
-juvenile always has a different morphology and ecology than adult

Question 12

Reproduction of hexapods

Answer 12

-all have seperate sex
-pterygote copulate, all others transfer sperm using a spermatophore