Crustacea

Question 1

___ subphylum of arthropods

Answer 1

Second largest; ~67,000 species described

Question 2

Crustacea are ___ arthropods, few are ___

Answer 2

Dominant aquatic, terrestrial

Question 3

Closest related subphylum to ___, together form the clade ___

Answer 3

Insects and other hexapods, pancrustacea

Question 4

Crustacea are the only arthropod group with ___

Answer 4

2 pairs of antennae

Question 5

Most crustaceans have ___ and ___, and

Answer 5

Cephalothorax and abdomen, mandibles as mouthparts, carapace

Question 6

Carapace is a ___

Answer 6

Plate that covers the cephalothorax

Question 7

In some groups the carapace ___

Answer 7

Covers the entire body

Question 8

Crustacean ___ is reinforced with ___

Answer 8

Exoskeleton, calcium carbonate

Question 9

Crustaceans have ___ appendages

Answer 9

Biramous; 2 branches

Question 10

Crustaceans have ___ circulatory system

Answer 10

Open

Question 11

In Crustacean circulatory systems, ___ pumps ___ throughout the body

Answer 11

Dorsal heart, hemolymph (blood + interstitial fluid)

Question 12

Nervous system is similar to ___ but with more fusion of ganglia

Answer 12

Annelids

Question 13

Sensory organs are ___

Answer 13

Well-developed

Question 14

Statocyst

Answer 14

balance organ found in the antennae

Question 15

Compound eyes made up of ___

Answer 15

Ommatidia

Question 16

___ is the most diverse crustacean classs

Answer 16

Malacostraca; 20,000 species

Question 17

Malacostraca has ___ orders

Answer 17

4: Isopoda, Amphipoda, Euphausiacea, Decapoda

Question 18

Isopoda are the only crustaceans with ___

Answer 18

Fully terrestrial species

Question 19

Isopods are ___

Answer 19

Dorsoventrally flattened

Question 20

Isopods have no ___

Answer 20

Carapace

Question 21

Many Isopod species can ___

Answer 21

roll into a ball for protection

Question 22

Amphipods lack ___

Answer 22

A carapace

Question 23

Amphipods are ___

Answer 23

Laterally compressed

Question 24

Amphipods are typically ___

Answer 24

Marine, with some beach dwelling, freshwater, and parasitic species

Question 25

Euphausiacea

Answer 25

Krill

Question 26

Euphausiacea has ___ species but are important as ___

Answer 26

90, planktonic organisms

Question 27

Most Euphasuiacea are ___

Answer 27

Bioluminescent

Question 28

Euphausiacea are major part of the diets of ___ and of ___

Answer 28

fish, baleen whales

Question 29

Decapoda

Answer 29

Crabs, lobsters, crayfish and "true shrimp"

Question 30

Decapoda has ___ species

Answer 30

18,000

Question 31

Decapods have ___ pairs of walking legs

Answer 31

5

Question 32

Decapoda size range from ___ to ___

Answer 32

few mm, 4 meters

Question 33

Decapoda are ___

Answer 33

Economically important

Question 34

Numerous species of Decapoda are ___

Answer 34

Food sources

Question 35

Crabs have a variety of ___

Answer 35

forms

Question 36

Crabs are distinguished by a ___ and ___

Answer 36

Broad cephalothorax, reduced abdomen

Question 37

The crab body plan ___

Answer 37

Evolved multiple times outside of the "true crabs"

Question 38

Brachyura

Answer 38

True crabs

Question 39

Process of non-crab crustaceans independently evolving crab-like forms is known as ___

Answer 39

carcinization

Question 40

Hexapoda are the ___ group of arthropods

Answer 40

Most numerous

Question 41

Hexapoda have ___ walking legs

Answer 41

6

Question 42

All Hexapoda legs are ___

Answer 42

Uniramous

Question 43

Hexapoda have ___ tagmata

Answer 43

3: Head, Thorax, Abdomen

Question 44

Hexapoda have ___ classes

Answer 44

2: Entognatha, Insecta

Question 45

Insecta is the ___ group of animals

Answer 45

Largest

Question 46

Around ___ currently described species of Insecta

Answer 46

1.1 million

Question 47

Insecta are found in ___

Answer 47

Almost every habitat that supports life

Question 48

Few insecta are ___, some are ___

Answer 48

Truly marine, intertidal

Question 49

Study of insects is called ___

Answer 49

entomology

Question 50

Insects are the only ___ capable of ___

Answer 50

invertebrates, flight

Question 51

Insects usually have ___ of wings attached to the ___

Answer 51

2 pairs, thorax

Question 52

True flies have modified hindwings called ___ that aid in balance during flight

Answer 52

halteres

Question 53

Some insect groups have 1 or none ___

Answer 53

Pairs of wings

Question 54

Insecta head typically contains ___, ___, ___

Answer 54

1 pair of compund eyes, 1 pair of antennae, 3 ocelli

Question 55

Ocelli are ___

Answer 55

Simple light-detecting organs

Question 56

Insects ___ are modified for special purposes

Answer 56

legs

Question 57

Grasshoppers have ___ adapt for jumping

Answer 57

Hind legs

Question 58

Mantises have ___ adapted for grasping prey

Answer 58

Forelegs

Question 59

Insects have ___ diets

Answer 59

Varied

Question 60

Most insects feed on ___, some feed on ___ or ___

Answer 60

plants, dead animals, hunt other animals

Question 61

Many insects are ___

Answer 61

Parasitic

Question 62

Insect ___ are specialized depending on the diet

Answer 62

Mouthparts

Question 63

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