ch 22: crustacea Flashcards
1
Q
6 feat of crustaceans
A
- great diversity of body plan
- mostly aquatic
- head w/ up to 5 pairs of appendages incl mandibles and 2 pairs of antennae
- compound eyes
- biramous appendages
- nauplis larvae w/ 3 pairs of appendages and 1 medial eye
2
Q
class malacostraca (5)
A
- crabs
- lobsters
- shrimp
- isopods
- amphipods
3
Q
how many pairs of antennae do crustaceans have?
A
2
4
Q
malacostraca morphological diversity
A
some taxa have many segments and many pairs of appendages
5
Q
malacostraca features (2)
A
- head and thorax usually fused and covered by a carapace
- many spp have chromatophores
6
Q
order decapoda (3)
A
- lobsters
- shrimps
- crabs
7
Q
what other order is also called decapoda
A
squids, cuttlefishes (mollusca, cephalopoda)
8
Q
order amphipoda
A
sand fleas
9
Q
order isopoda
A
wood bugs
10
Q
decapoda characteristics (2)
A
- cuticle hardened by calcification
- carapace fused w/ dorsum but not w/ sides
11
Q
abdominal appendages in decapods (2)
A
- 5 pairs of swimmerets
- 1 pair of uropods
12
Q
decapod chelae (3)
A
- used for defense
- tearing/crushing prey
- asymm
13
Q
how many walking legs do decapods have?
A
5, posterior
14
Q
decapod other walking leg functs (3)
A
- grasping/passing food
- digging
- carrying sensory bristles
15
Q
lobster life cycle (3)
A
- no larval form
- direct development
- parental care
