ecdysozoa Flashcards
1
Q
ecydysozoa
A
perform ecdysis / shedding of the skin
2
Q
arthropoda phylum
4
A
- most successful and abundant
- 3/4 of all living species
- jointed feet
- legs and some have wings
3
Q
subphylum trilopita
6
A
- ancient arthropods
- they are cute and look like those egyptian bugs
- extinct for ~ 250million yrs
- exoskeleton
- fused segments
- branched appendages
4
Q
subphylum chelicerata
A
- first pair of appendages – used for feeding
- lack mandibles and antennae
- chelicerea used for feeding
ex. horseshoe crabs, arachnids, and sea spiders
5
Q
class merostomata
A
- from subphylum chelicerata
- book gills
- morphologically unchanged
- larger ferns
ex. horseshoe crab
6
Q
horseshoe crab anatomy
A
- simple eye on top of their head
- compound eye on each side
- telson - tail for mobility
- cephalothorax
- pedipalp - longest legs on male
- book gills to breath (in abdomen)
carapace - shell-looking structure
7
Q
class arachnida
A
- phylum chelicerata
- gas exchange through book lungs or tracheal tubes
- chelicerae was modified to fangs
ex. spiders, ticks, mites
8
Q
spiders vs insects
A
spiders have 2 body regions + 8 legs
insects have 3 body regions + 6 legs
9
Q
subphylum crustacea
7
A
- covered by carapace
- two segments
- exoskeleton !!
- gills
- antennae - touch and taste
- several legs
- biramous appendages (each leg has 2 joints)
ex. isopods, crabs, shrimps, lobsters, barnacles
10
Q
crayfish anatomy
7
A
- antennule - small antenna near the mouth
- antenna - longer antenna
- carapace - neck-like structure
- claw
- walking legs
- swimmerets - smaller legs in the abdomen
- telson - leg
11
Q
uropod
A
in the tail of the crayfish
12
Q
rostrum
A
near the eyes of the crayfish
13
Q
gonads
A
rep. organ
yellow ish, in the carapace
crayfish
14
Q
mandibular muscle
A
after the eyes of a crayfish
15
Q
gastric mill
A
found inside the stomach of a CRAYFISH
looks like teeth
are used to grind food
