Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Diversity of Life > Decapoda > Flashcards

Decapoda Flashcards

1
Q

What order to the Crustaceans belong to?

A

Decapoda.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the key features that contributed to the success of arthropods?

A

Muscles attached to inside of rigid exoskeletons
Segmentation: each segment has muscles that operate it and its appendages
Crustaceans grouped by number of segments in each body region (head, thorax, abdomen)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What type of feeding do crustaceans exhibit?

A

Filter feeding, scavenging, predation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What ancient group of arthropods do crustaceans belong to?

A

Mandibulates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What defines Mandibulates?

A

Arthropods with jaws, mandibles for chewing, biting and holding. Also have paired antennae (includes hexapods, myriapods)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What makes Chelicerates differ?

A

Lack jaws, two pairs of appendages modified to mouthparts (includes spiders, mites, scorpions)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What regions can crustaceans be divided into?

A

2/3, either head, thorax and abdomen or the head and thorax are fused together (Cephalothorax)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What other features are common of crustaceans?

A

Chitinous exoskeleton hardened by calcium carbonate and a carapace which is a fold of exoskeleton that extends over the head head and thorax region.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the functions of the two pairs of antennae?

A

Large - taste, touch, smell

Small - taste, touch, balance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the crustacean body form?

A

Pair of mandibles and two pairs of maxillae on the head, pair of stalked compound eyes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How are crustacean appendages specialised?

A

claws for protection, antennae for sensing, pereiopods for walking, pleopods for swimming, mandible for food capture, uropod as tail.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How are crustaceans’ limbs biramous?

A

It branches into two.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define the class Malacostraca?

A

Harder, heavy plates in larger crustaceans due to calcareous deposits in addition to chitin, carapace covers much/all of the cephalothorax (includes Decapoda, Isopoda, Euphausiacea)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is Decapoda comprised of?

A

Crabs, lobsters, shrimp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is Isopoda comprised of?

A

Pillbug

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are Euphausiacea?

A

Krill

17
Q

What is the typical body plan of a Malacostraca?

A

Usually have a head with 5 fused segments, a thorax with 8 segments and an abdomen with 6 segments.

18
Q

What is the function of the maxillipeds?

A

Help hold food.

19
Q

Give an overview of crustacean reproduction?

A

Sexual, internal fertilisation, mating directly after female moults, brood eggs in brood chambers, in brood sacs attached to the abdomen (In decapods eggs are carried in pleopods), after hatching, young are released as larvae or a juveniles.

20
Q

Define characteristics common of true crabs?

A

10 legs, 1st pair are claws (Chelae), abdomen small and typically broad cephalothorax, sexual dimorphism (male V-shape abdomen, female U-shape).

21
Q

Give an overview of the crab lifecycle?

A

Female with eggs > zoea (free swimming offshore) > megaflops (larvae move inshore) > juvenile (bottom dwelling inshore) > adult crab (inshore) > migrate offshore to brood eggs.

22
Q

what does the Christmas Island Crab show?

A

Endemic to Xmas and Cocos Islands, mass migrations to breed.

23
Q

What is the Nauplius stage?

A

A larval stage with no evident segmentation, single eye at front of head, only 3 pairs of appendages that all aid in swimming.

24
Q

Give an overview of the Shrimp life cycle?

A

Egg > Nauphilus (swims with antennae) > Protozoea (uses antennae but develops a carapace and some thoracic limbs) > miss > positiarval stage > adult.

25
Q

What are common characteristics of Euphausiaceae (Krill)?

A

Distinctive carapace, filter feeder (diatoms and planktons), bioluminescent (light producing organ called the photophore), eggs hatch as nauplii.

26
Q

Define characteristics of Isopods?

A

Dorsoventrically flattened, lack a carapace, have sessile compound eyes, mouthparts for grinding and masticating, females carry young in pouch, only true terrestrial crustaceans.

27
Q

What belong to the order Cirripedia?

A

Barnacles

28
Q

Give some common characteristics of barnacles?

A

Sessile, attach to surface, have cirri, suspension feeding, hermaphroditic, sexual reproduction.

29
Q

Give an overview of the barnacle life cycle?

A

Larval release, 6 nauplius stages, moults to cypris (larva with bivalve carapace), settles and metamorphosises.

Diversity of Life (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions